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Q170 Practice Quiz
Deck General and Safety. The real paper is 50 questions and you need 35 correct (70%) to pass. There are 278 questions here. Take a mock exam weighted the way the paper is, or drill one topic. Every answer links to the material that settles it.
All 278 questions
Grouped by topic, heaviest first. Click a question to see its answer and the material behind it.
Fire Prevention and Firefighting
27 questions · 22% of the paper
What is required in addition to the heat, fuel, and oxygen of the fire triangle to have a fire?
- Electricity
- Pressure
- Smoke
- Chain reaction ← correct
Where would spontaneous combustion most likely to occur?
- In dirty swabs and cleaning gear
- In rags soaked in linseed oil ← correct
- In partially loaded fuel tanks
- In overloaded electrical circuits
Spontaneous ignition can result from __________.
- worn electrical wires on power tools
- an unprotected drop-light bulb
- careless disposal or storage of material ← correct
- smoking in bed
Fire extinguishing agents used on class C fires must have which characteristic?
- Non-conducting ← correct
- Non-toxic
- Able to absorb heat
- Water based
Which extinguishing agent is/are suitable to combat a class B fire in an engine compartment?
- Carbon dioxide
- Dry chemical
- Foam
- All of the above ← correct
If heavy smoke is coming from the paint locker, what should be the FIRST firefighting response?
- Release the CO2 flooding system
- Secure the ventilation ← correct
- Open the door to evaluate the extent of the fire
- Enter and use a portable extinguisher
CO2 mainly extinguishes a fire by which of the following?
- Smothering ← correct
- Chemical action
- Cooling
- All of the above
Which is an advantage of an ABC dry chemical over a carbon dioxide extinguisher?
- Less damage to electrical components
- Greater multipurpose extinguishing ability ← correct
- Lack of toxicity
- Burn-back protection
What is NOT listed on the metallic name plate that is required to be attached to hand portable fire extinguishers according to uninspected vessel regulations?
- An identifying mark of the actual manufacturer
- The name of the item
- The rated capacity in gallons, quarts, or pounds
- The hydrostatic test date of the cylinder ← correct
According to uninspected vessel regulations, what is the minimum number of portable fire extinguishers required on board a 45-foot motorboat built in 2017 having a fixed fire system on board?
- 1 5-B
- 2 5-B ← correct
- 3 5-B
- 4 5-B
How does good housekeeping prevent fires on a vessel?
- Improving personnel qualifications
- Eliminating trip hazards
- Eliminating potential fuel sources ← correct
- Allowing better access in an emergency
Which extinguishing agent is most likely to allow reflash as a result of not cooling the fuel below its ignition temperature?
- CO2 ← correct
- Water stream
- Water spray
- Foam
Removing which will extinguish a fire?
- Nitrogen
- Carbon dioxide
- Sodium
- Oxygen ← correct
Which statement is TRUE concerning the application of foam on an oil fire?
- It cools the surface of the liquid.
- It gives protection to fire fighting personnel against the heat of the fire.
- It forms a smothering blanket on the surface of the oil. ← correct
- It should be used at the same time a solid stream of water is being applied.
Foam-type portable fire extinguishers are most useful in combating fires involving __________.
- solid materials such as wood or bales of fiber
- flammable liquids ← correct
- electrical equipment
- metallic solids
The extinguishing agent most likely to allow reignition of a fire is __________.
- carbon dioxide ← correct
- foam
- water fog
- water stream
What would be the most effective agent to use to extinguish a fire in drums of flammable liquids stowed on the weather deck of a vessel?
- Carbon dioxide
- Foam ← correct
- Steam
- Water fog
Some spaces protected by fixed carbon dioxide systems are required to have audible alarms that begin sounding prior to the discharge of CO2. This time delay must be at least __________.
- 20 seconds ← correct
- 40 seconds
- one minute
- two minutes
A cabinet or space containing the controls or valves for the fixed firefighting system must be __________.
- posted with instructions on the operation of the system ← correct
- ventilated and equipped with explosion-proof switches
- painted with red and black diagonal stripes
- equipped with a battery powered source of emergency lighting
All vessels not required to have a power driven fire pump shall carry __________. (small passenger vessel regulations)
- a suitable, detachable pump usable for fire fighting purposes
- at least three 2-1/2 gallon fire buckets ← correct
- an emergency hand fire and bilge pump
- not less than three hand fire pumps
Which statement is TRUE concerning fire hose on a small passenger vessel?
- Fire hose shall be at least 3/4" outside diameter.
- One length of fire hose shall be provided for every two fire hydrants.
- All fittings on hoses shall be of steel or other ferrous metal.
- A length of hose with nozzle attached shall be attached to each fire hydrant at all times. ← correct
A length of fire hose shall be __________. (small passenger vessel regulations)
- attached to each fire hydrant at all times ← correct
- equipped with a rotary sprinkler head
- marked with the lot number and wholesale price
- not more than 10 feet in length
If your vessel is required to have a fire ax on board, where should it be located? (small passenger vessel regulations)
- In or adjacent to the primary operating station ← correct
- In below-decks passenger accommodations
- Just outside the engine room access
- In the galley near the stove
Before releasing the CO2 into the space, the alarm for a fixed CO2 system must sound for at least __________.
- 20 seconds ← correct
- 30 seconds
- 40 seconds
- 60 seconds
The straight stream capability of an all-purpose nozzle is used in fighting a class A fire to __________.
- shield fire fighters from radiant heat
- break up burning material ← correct
- get the most water possible on the fire
- drive heat and smoke ahead of the fire fighters
In battery charging rooms, exhaust ventilation should be provided __________.
- at the lowest point
- near the batteries
- at the highest point ← correct
- only when charging is in progress
A galley grease fire on the stove may be extinguished using_______.
- water
- foam
- the range hood extinguishing system ← correct
- fire dampers
Vessel Maneuvering and Handling
21 questions · 14% of the paper
Which is a predictable result of a vessel nearing a bank or edge of a steep banked channel?
- The vessel will be drawn bodily into the bank unless the engines are stopped
- The bow sheers toward the bank
- The stern is drawn to the bank as the bow sheers off ← correct
- The vessel continues in a straight line, but with greatly reduced maneuverability
You are making a sharp turn in a channel and using a buoy four points on the bow to gauge your rate of turn. If you observe the buoy moving forward relative to you, what should you do?
- Increase speed
- Increase the rate of turn
- Decrease the rate of turn ← correct
- Maintain a constant rate of turn
You are docking a vessel. When are the wind and current most favorable in this situation?
- When they are crossing your course, both in the same direction
- When they are both setting you on the pier
- When they are both parallel to the pier from ahead ← correct
- When they are crossing your course, in opposite directions to the other
After casting off moorings at a mooring buoy in calm weather, which action should you take?
- Go half ahead on the engines and put the rudder hard right
- Go half ahead on the engines and pass upstream of the buoy
- Go full ahead on the engine(s)
- Back away a few lengths to clear the buoy and then go ahead on the engines ← correct
When is the effect of wind on exposed areas of the vessel most noticeable?
- When turning
- When going full ahead
- When backing ← correct
- When going slow ahead
The possibility of wake damage can be reduced by following which action?
- Slow down when passing moored vessels ← correct
- Alternate engine speeds
- Apply rudder in both port and starboard directions
- Passing close aboard to the moored vessel
While proceeding up a narrow waterway you observe a vessel berthed in the river with slack mooring lines. Which is the most prudent action to take FIRST?
- Contact the moored vessel
- Reduce the speed of your vessel ← correct
- Give 5 short blasts on the whistle
- Call the US Coast Guard
The distance that a vessel travels from the time that the order to put engines full astern until the vessel is dead in the water is known as __________.
- advance
- head reach ← correct
- surge
- transfer
When heading on a course, you put your rudder hard over. The distance traveled parallel to the direction of the original course from where you put your rudder over to any point on the turning circle is known as __________.
- advance ← correct
- head reach
- tactical diameter
- transfer
The distance gained in the direction of the original course when you are making a turn is known as __________.
- advance ← correct
- drift
- tactical diameter
- transfer
As the propeller turns, voids are formed on the trailing and leading edges of the propeller blades causing a loss of propulsive efficiency, pitting of the blades, and vibration. These voids are known as __________.
- advance
- cavitation ← correct
- edging
- slip
Generally, you can best keep a vessel under steering control when the vessel has __________.
- headway ← correct
- sternway
- no way on, with engines stopped
- no way on, with engines full ahead
The effect known as "bank cushion" acts in which of the following ways on a single-screw vessel proceeding along a narrow channel?
- It forces the bow away from the bank. ← correct
- It forces the stern away from the bank.
- It forces the entire vessel away from the bank.
- It heels the vessel toward the bank.
A vessel traveling down a narrow channel, especially if the draft is nearly equal to the depth of the water, may set off the nearer side. This effect is known as __________.
- smelling the bottom
- squatting
- bank suction
- bank cushion ← correct
Your vessel is proceeding along a narrow channel. The effect called bank cushion has which effect on the vessel?
- Forces the bow away from the bank ← correct
- Forces the stern away from the bank
- Forces the entire vessel bodily away from the bank
- Decreases the draft at the bow
You notice that your speed has decreased, the stern of your vessel has settled into the water, and your rudder is sluggish in responding. The MOST likely cause is __________.
- mechanical problems with the steering gear
- shallow water ← correct
- loss of lubricating oil in the engine
- current
A vessel proceeding along the bank of a river or channel has the tendency to __________.
- continue in line with the bank
- hug the bank
- sheer away from the bank ← correct
- increase speed
A wedge of water building up between the bow and nearer bank which forces the bow out and away describes __________.
- bank cushion ← correct
- bank suction
- combined effect
- bend effect
When a vessel is swinging from side to side off course due to quartering seas, the vessel is __________.
- broaching
- pitchpoling
- rolling
- yawing ← correct
On a vessel with a single propeller, transverse force has the most effect on the vessel when the engine is put __________.
- full ahead
- full astern ← correct
- half ahead
- slow astern
You are approaching a steamer that is broken down and are preparing to take her in tow. BEFORE positioning your vessel to pass the towline, you must __________.
- compare the rate of drift between the ships ← correct
- install chafing gear on the towline
- secure the bitter end of the towing hawser to prevent loss if the tow is slipped
- have traveling lizards rigged to guide the towline while it is paid- out
Marlinspike Seamanship
31 questions · 10% of the paper
How is a safety shackle identified?
- The design of the pin ← correct
- The certification stamp
- The shape
- The color code
Which term describes the rope which is rove through a tail block to be used with a bosun's chair?
- Strop
- Gantline ← correct
- Life line
- Whip
Which factor is most likely to impair the strength and durability of synthetic line?
- Dry rot
- Washing with mild soap
- Sunlight ← correct
- Mildew
Which letter in illustration D030DG below represents a plain whipping?
This question is asked against Coast Guard illustration D030DG, which we cannot reproduce — the examination drawings are adapted from copyrighted works. To work it you need the illustration in front of you.
- J ← correct
- V
- E
- F
Which of the following describes a fid?
- A sharp pointed crowbar used to unlay wire rope
- A mallet used when splicing wire rope
- A tapered wooden pin used when splicing heavy rope ← correct
- A tapered steel pin used to separate wire rope
The amount of force a tug can exert on a stationary pull is called its __________.
- brake horsepower
- indicated horsepower
- shaft horsepower
- bollard pull ← correct
Which type of fiber towing hawser is preferred for towing astern?
- Manila
- Polypropylene
- Nylon ← correct
- Dacron
The "lay" of a line refers to __________.
- its normal location of stowage
- the direction of twist in the strands ← correct
- the manner in which it is coiled
- the manner in which it is rigged
Right-laid line should be coiled __________.
- clockwise ← correct
- counterclockwise
- either clockwise or counterclockwise
- on a reel
The strongest of the natural fibers is __________.
- cotton
- hemp
- manila ← correct
- sisal
In the manufacture of line, plant fibers are twisted together to form __________.
- cable
- line
- strands
- yarns ← correct
Nylon line can be dangerous because it __________.
- breaks down when wet
- kinks when wet
- is not elastic
- stretches ← correct
Which line would be least likely to kink?
- Braided ← correct
- Left-handed laid
- Right-handed laid
- Straight laid
Compared to manila line, size for size, nylon line __________.
- has less strength than manila line
- has more strength than manila line ← correct
- is equivalent to manila line
- will rot quicker than manila line
Which type of line will stretch the most when under strain?
- Polypropylene
- Dacron
- Nylon ← correct
- Manila
Under identical load conditions, nylon, when compared with natural fiber line, will stretch __________.
- less and have less strength
- more and have less strength
- more and have greater strength ← correct
- less and have greater strength
Two mooring lines may be placed on the same bollard and either one cast off first if __________.
- the eye of the second line is dipped ← correct
- the mooring lines are doubled
- the bollard has two horns
- one of the lines is a breast line
The size of wire rope is determined by the __________.
- number of strands
- number of wires in each strand
- circumference
- diameter ← correct
Which splice should you use in order to make a permanent loop in a line?
- Back splice
- Eye splice ← correct
- Long splice
- Short splice
If a mooring line should part while you are tying up at a dock, you should make a temporary eye by tying a __________.
- becket bend
- clove hitch
- bowline ← correct
- square knot
Which material makes the strongest mooring line?
- Sisal
- Manila
- Nylon ← correct
- Polyproylene
You need to make a fixed loop at the end of a line in order to use the line as a mooring line. You have insufficient time to make a splice. Which knot should you use?
- Clove Hitch
- Fisherman's Bend
- Bowline ← correct
- Round-turn and two half hitches
The disadvantage of using three strand nylon line for towing is its __________.
- inherent weakness
- tendency to rot if left damp
- danger to crew if it parts ← correct
- strength and shock absorbing abilities
When a line is subject to wear where it passes through a mooring chock, it should be __________.
- wormed, parceled, and served
- wrapped with heavy tape
- wrapped with chafing gear ← correct
- wrapped in leather
Which term describes a part of a natural fiber line?
- Lacings
- Lays
- Strands ← correct
- Twines
Which term describes a part of a natural fiber line?
- Twines
- Fibers ← correct
- Lays
- Lacings
Which term describes a part of a natural fiber line?
- Yarns ← correct
- Twines
- Lacings
- Lays
What is used to prevent wear on towlines that bear on hard surfaces?
- Chafing gear ← correct
- Chocks
- Grease
- Boots
The line with the most stretch is __________.
- manila
- nylon ← correct
- polypropylene
- dacron
The knot at the end of the heaving line used to pass the towing hawser is called a __________.
- monkey's fist ← correct
- ball or baseball knot
- heaving knot
- three strand Turk's head
On small sailing vessels, the PRIMARY reason for using nylon in a combination chain-nylon anchor line is to __________.
- provide elasticity ← correct
- increase the strength
- reduce the cost
- reduce the weight
Anchoring, Mooring, Berthing and Unberthing
34 questions · 8% of the paper
Which lines primary function is to reduce the fore and aft motion of a docked vessel?
- The bow and stern lines ← correct
- The breast lines
- The quarter breast lines
- The bow cross spring lines
Which method of adjusting mooring lines is MOST useful for leaving a boat free to rise and fall with the tide?
- Crossing the spring lines ← correct
- Slacking bow and stern lines
- Slacking all forward running lines while keeping all after running lines taut
- Doubling up on spring or breast lines
Which type of bottom is best suited for holding an anchor of a small boat?
- Mud and clay ← correct
- Rocky
- Sandy
- Gravel
Which is TRUE when you pay out more anchor cable?
- This action decreases the swing of your vessel while at anchor
- This action will decrease the holding power of your anchor
- This action will increase the holding power of your anchor ← correct
- This action will increase the possibility that your vessel will drag anchor
A metal object on the pier resembling a tree stump and made to receive mooring lines is a __________.
- bight
- bollard ← correct
- chock
- camel
When underway and proceeding ahead, as the speed increases, the pivot point tends to __________.
- move aft
- move forward ← correct
- move lower
- remain stationary
The pivoting point of a fully loaded vessel with normal trim proceeding ahead at sea speed is __________.
- right at the bow
- one-third the length of the vessel from the bow ← correct
- one-half the length of the vessel from the bow
- two-thirds the length of the vessel from the bow
The distance a vessel moves at right angles to the original course, when a turn of 180° has been completed, is called the __________.
- advance
- pivoting point
- tactical diameter ← correct
- kick
The holding capability of an anchor is primarily determined by the __________.
- shape of the anchor
- stowage of the anchor on board
- anchor's ability to dig in ← correct
- size of the vessel and its draft
A chain bridle is used when towing astern because it __________.
- is easy to connect
- provides an effective catenary and absorbs shock due to its weight ← correct
- makes rigging a swivel unnecessary
- prevents the tow from yawing by the drag of the chains in a seaway
A natural fiber rope can be ruined by dampness because it may __________.
- rot ← correct
- shrink
- stretch
- unlay
A metal eye spliced into a wire is called a __________.
- cyclops
- fish eye
- thimble ← correct
- chip
The holding capabilities of an anchor are determined PRIMARILY by the __________.
- design of the anchor
- weight of the anchor
- scope of the anchor chain ← correct
- size of the vessel
What should you do to a line to prevent fraying where it passes over the side of the vessel?
- Worm that part of the line.
- Splice that part of the line.
- Cover it with chafing gear. ← correct
- Install a cleat.
When anchored, increasing the scope of the anchor chain normally serves to __________.
- prevent fouling of the anchor
- decrease swing of the vessel
- prevent dragging of the anchor ← correct
- reduce strain on the windlass
A Danforth lightweight anchor does NOT hold well in which type of bottom?
- Mud
- Grass ← correct
- Sand
- Clay
A post on a dock or wharf used to secure mooring lines or hawsers is called a __________.
- bitt
- bollard ← correct
- cleat
- capstan
The best method of protecting that portion of a fiber anchor line nearest the anchor from chafing on the bottom is by __________.
- using a small scope ratio
- replacing that portion with a short length of chain ← correct
- using a hockle to keep that portion of the anchor line off the bottom
- using a synthetic line
The major components which determine the length of catenary in a deployed anchor cable are water depth, cable tension, and __________.
- environmental forces
- bottom conditions
- cable weight ← correct
- water density
Which line is two-stranded, left-handed small stuff?
- Houseline
- Marline ← correct
- Ratline
- Lagline
Which type of bottom is best suited for holding an anchor of a small boat?
- Mud and clay ← correct
- Rocky
- Sandy
- Gravel
Angular motion about the vertical axis of a vessel is called __________.
- yaw ← correct
- surge
- sway
- roll
Tugs sometimes shackle a length of chain in the towline in order to __________.
- take the wear should the towline drag bottom
- assure that if the towline is overstressed it will part close to the bridle
- prevent the towline from whipping should it part
- put spring in the towline ← correct
Yawing is angular motion of the vessel about what axis?
- Longitudinal
- Transverse
- Vertical ← correct
- Centerline
The distance between the waterline of a vessel and the main deck is called __________.
- draft
- freeboard ← correct
- buoyancy
- camber
Forces within a vessel have caused a difference between the starboard and port drafts. This difference is called __________.
- list ← correct
- heel
- trim
- flotation
When a sea anchor for a survival craft is properly rigged, it will __________.
- completely stop the survival craft from drifting
- help to prevent broaching ← correct
- prevent the survival craft from pitching
- prevent the survival craft from rolling
In a combination chain and wire rope mooring system, the chain is deployed at the anchor end of the line to __________.
- increase fatigue life
- eliminate the need for mooring buoys
- prevent the anchor from fouling
- increase the catenary ← correct
The difference between the starboard and port drafts caused by shifting a weight transversely is __________.
- list ← correct
- heel
- trim
- flotation
A wind has caused a difference between drafts starboard and port. This difference is __________.
- list
- heel ← correct
- trim
- flotation
The difference between the starboard and port drafts due to wind or seas is called __________.
- list
- heel ← correct
- trim
- flotation
With no environmental forces, the center of gravity of an inclined vessel is vertically aligned with the __________.
- longitudinal centerline
- center of flotation
- original vertical centerline
- center of buoyancy ← correct
In the absence of external forces, the center of buoyancy of an inclined vessel is vertically aligned directly below the __________.
- center of gravity ← correct
- amidships station
- center of flotation
- geometric center of the waterplane area
With no environmental forces, the center of gravity of an inclined vessel is vertically aligned directly above the __________.
- longitudinal centerline
- center of buoyancy ← correct
- original vertical centerline
- center of flotation
Lifesaving and Survival
37 questions · 8% of the paper
When a ship is abandoned and there are several liferafts in the water, which task must be done to aid in your rescue?
- Transfer all the injured to one raft
- Transfer all supplies to one raft and post a guard
- Separate the rafts by drifting away to increase chances of detection
- Secure the rafts together to keep them from drifting apart ← correct
Life jackets should be marked with which item?
- The vessel's name ← correct
- The vessel's home port
- The maximum weight allowed
- The stowage space assigned
Which is TRUE concerning the stowage of life jackets?
- They must be stowed in readily accessible locations ← correct
- They are required to be stowed in messrooms
- They are required to be stowed in a central location
- They are always locked in watertight containers
If you are required to jump from any height from your vessel when should the external flotation bladder of an immersion suit be inflated?
- After entry into the water ← correct
- Only after four hours in the water
- Only after two hours in the water
- Before entry into the water
Which type of EPIRB must each ocean-going ship carry?
- Class A
- Class B
- Class C
- Category 1 ← correct
The vessel's Emergency Position Indicating Radio beacon (EPIRB) must be tested __________.
- weekly
- monthly ← correct
- every 2 months
- every 3 months
The Master shall insure that the Emergency Position Indicating Radio beacon (EPIRB) is __________.
- secured inside the wheelhouse
- tested annually
- tested monthly ← correct
- secured in the emergency locker
On small passenger vessels if an item of lifesaving equipment is carried but not required __________.
- the equipment must be approved by the Commandant ← correct
- it must be removed from the vessel as excess equipment
- it may remain aboard the vessel as excess equipment regardless of its condition
- it must be destroyed in the presence of a marine inspector
For the purposes of distress signaling, small passenger vessels that operate on runs of more than 30 minutes duration on lakes, bays and sounds, and river routes must carry __________.
- A radiotelephone
- Three hand red flare distress signals, and three hand orange smoke distress signals ← correct
- A "Very" pistol and flare kit
- An approved noise- making device
Ring life buoys used aboard a small passenger vessels on oceans or coastwise routes are required to be what color?
- White
- White or international orange
- Orange ← correct
- Any highly visible color easily seen from the air
The color of rockets, shells, or rocket parachute flares used to indicate that the vessel is in distress and requires immediate assistance is __________.
- white
- green
- red ← correct
- yellow
Life preservers must be marked with the __________.
- stowage space assigned
- vessel's name ← correct
- vessel's home port
- maximum weight allowed
The life jackets on all vessels shall be __________.
- inspected weekly
- worn at all times
- readily available ← correct
- tested yearly
Required lifesaving equipment on existing vessels may be continued in use on the vessel if __________.
- kept on board no more than 2 years
- inspected and serviced every 6 months
- destroyed if more than 5 years old
- maintained in good and serviceable condition ← correct
The operating cord on an inflatable liferaft should be renewed by __________.
- removing the top half of the shell, cutting the line at its source, and renewing completely
- cutting the line where it enters the case and replacing that portion
- leaving the original line and tying another one to it so the two lines will take the strain
- an approved servicing facility ashore ← correct
According to the "T-Boat" regulations, the permanent marks placed on each side of a vessel forward, aft, and amidships to indicate the maximum allowable draft and trim are called __________.
- loading marks ← correct
- the air draft
- depth marks
- Plimsoll marks
On vessels subject to the provisions of 46 CFR Subchapter T, life jackets shall be __________.
- kept locked up at all times when underway
- stored in convenient places throughout the accommodation spaces ← correct
- inaccessible to passengers
- on the topmost deck of the vessel at all times
On vessels on an international voyage, each inflatable liferaft shall have a carrying capacity of not less than __________.
- 50 percent of all persons on board
- 75 percent of all persons on board
- 6 persons ← correct
- 10 persons
Which approved lifesaving device is required for each person on board a motor vessel carrying passengers?
- Buoyant cushion
- Buoyant vest
- Life jacket ← correct
- Ring life buoy
Which lifesaving equipment must be tested monthly?
- Inflatable PFD's
- EPIRB ← correct
- Hydrostatic releases
- Dated batteries
Distress flares and smoke signals are not required on vessels operating on short runs. A "short run" is limited to __________. (small passenger vessel regulation)
- water of less than 20 feet in depth
- where land is always in sight
- no more than 5 miles
- about 30 minutes away from the dock ← correct
Life jackets should be marked with the __________.
- maximum weight allowed
- stowage space assigned
- vessel's home port
- vessel's name ← correct
What equipment must be on a life float? (small passenger vessel regulations)
- Two paddles, a light, painter, lifeline and pendants ← correct
- Water-light, painter, and signal mirror
- Water-light and painter only
- Two paddles, painter, and six red flares
Aboard small passenger vessels the number of childrens' life jackets carried must be at least what percentage of the total number of persons aboard?
- 4%
- 7.5%
- 10% ← correct
- 15%
Which equipment is not required for a life float? (small passenger vessel regulations)
- Paddles
- Light
- Painter
- Compass ← correct
Life floats and buoyant apparatus may be stowed in tiers, one above the other, to a height of not more than __________. (small passenger vessel regulations)
- 3 feet
- 4 feet ← correct
- 5 feet
- 6 feet
All life jackets carried on board small passenger vessels are required to be marked __________. (small passenger vessel regulations)
- with the vessel's name ← correct
- with the vessel's official number
- with the maximum weight to be held by the life preserver
- with the maximum serviceable life of the life preserver
Which of the devices listed will prevent an inflated liferaft from being pulled under by a vessel which sinks in water over 100 feet deep?
- The hydrostatic release
- A shear pin
- A rottmer release
- A weak link in the painter ← correct
A vessel carrying passengers for hire shall have on board an approved life jacket __________. (small passenger vessel regulations)
- for every passenger on board
- for every person on board, plus 10% childrens' life jackets ← correct
- for every person on board, plus 10% additional on upper deck in box
- or buoyant cushion for every person on board plus 10% for children
If your vessel is certificated to carry 10 persons, including both adults and children, how many life jackets are you required to carry on board? (small passenger vessel regulations)
- 11 adult
- 10 adult and 1 child ← correct
- 10 adult and 5 child
- 10 adult
Non-required lifesaving equipment carried as additional equipment aboard small passenger vessels __________.
- must be removed when carrying passengers
- must be approved by the Commandant ← correct
- may be substituted for not more than 5% of the required lifejackets
- may be carried regardless of approval or condition, if in excess of required lifesaving equipment
The painter of the inflatable liferaft has a length of __________.
- 25 feet
- 100 feet ← correct
- 200 feet
- 400 feet
Inflatable liferafts on vessels on an international voyage must be able to carry at least __________.
- 2 persons
- 4 persons
- 6 persons ← correct
- 8 persons
Which vessel is required to carry a Category I, 406 MHz EPIRB installed to automatically float free and activate? (small passenger vessel regulations)
- A vessel operating within 3 miles from the coastline in the Gulf of Mexico.
- A vessel operating on the ocean within 5 miles from the coastline.
- A vessel operating beyond 3 miles from the coastline of the Great Lakes. ← correct
- A vessel operating exclusively on inland waters.
Where must the draft marks be placed on a small passenger vessel?
- On each side of the stem
- Near the stern post or rudder post
- At each end of the vessel ← correct
- On each side, amidships
The EPIRB on board your vessel is required to be tested __________.
- weekly
- monthly ← correct
- quarterly
- yearly
Life floats must be equipped with __________. (small passenger vessel regulations)
- a sea anchor
- a signal mirror
- an EPIRB
- paddles ← correct
Heavy Weather Operations
3 questions · 6% of the paper
Which term defines when a boat turns broadside to heavy seas and winds, thus exposing the boat to the danger of capsizing?
- Trimmed
- Yawed
- Broached ← correct
- Pitchpoled
What is meant by the term "broaching to"?
- Having the vessel head toward the sea
- Having the vessel filled with water
- Running before a sea
- Being turned broadside to the sea ← correct
When making way in heavy seas you notice that your vessel's screw is being lifted clear of the water and racing. Which action will correct the situation?
- Decrease the vessel's speed ← correct
- Shift more weight forward
- Increase the vessel's speed
- Shift the rudder back and forth several times
Watchkeeping
7 questions · 6% of the paper
You are on watch at anchor awaiting berthing orders. Which statement is TRUE?
- The holding power of the anchor should be recorded once per watch
- While at anchor, check the vessel's position frequently ← correct
- The pilot came aboard, turn on the running lights and secure the cargo lights
- Be prepared to slack the lines at high water
When is a lookout permitted to leave his station?
- 15 minutes before the end of the watch
- Only when properly relieved ← correct
- At the end of the watch
- At any time
You are a watchstanding mate and have come to the bridge to relieve the watch. After reviewing the chart and having been briefed by the off-going mate, you are now ready to affect the relief. Which of the following is exemplary of the statement that would officially transfer the watch?
- You say to the mate going off watch, "Destination New York, course 283°, speed 16 knots."
- The mate being relieved says, "All in apparent good order, course 068° per gyro, 075° per standard."
- The mate being relieved says, "You now have the watch, course 147°, speed 15 knots."
- You say to the mate going off watch, "I relieve you, course 321° per gyro, 316° per standard." ← correct
On board small passenger vessels, how often shall the Master test the steering gear?
- Once a week
- Once a month
- Every 72 operating hours while underway
- Before getting underway for the day's operations ← correct
Aboard small passenger vessels the steering gear, signaling whistle, controls, and communication system shall be tested by the Master __________.
- once a week
- before getting underway for the day's operation ← correct
- at every inspection and reinspection
- at least once in every 48 hours
Your vessel has a gasoline engine and a mechanical exhaust ventilation system. BEFORE starting the engine, the exhaust blower should be run long enough to __________.
- warm up the exhaust blower motor
- provide a proper supply of fresh air for the engine(s)
- see the system is in good operating condition
- insure at least one complete change of air in the compartments concerned ← correct
A passenger vessel is required to have a supervised patrol when __________.
- there are passengers berthed on board ← correct
- navigating in excess of eight hours
- the vessel has substantial wood in its construction
- there is no automatic fire-detection system installed
Vessel Power Plants and Electrical
25 questions · 6% of the paper
If a gasoline engine turns over freely but will not start, the cause is generally __________.
- a defective ignition system ← correct
- low lube oil level
- too heavy a load
- weak valve springs
The carburetor is placed on the engine to perform which function?
- To distribute the gasoline
- To properly lubricate the engine
- To assist in priming the cylinders
- To mix the fuel and air ← correct
How can the accumulation of dangerous fumes generated by the storage batteries be prevented?
- By natural or mechanical ventilation ← correct
- Covering the batteries in a nonconducting, solid enclosure
- Mounting the batteries in a position as high as possible
- Securing the batteries to vibration reducing mounting brackets
Outlets in gasoline fuel lines are __________.
- prohibited ← correct
- permitted for draining fuel from lines
- permitted for drawing fuel samples
- permitted for bleeding air from lines
On small passenger vessels what device must you install under carburetors, other than the downdraft type, to allow ready removal of fuel leakage?
- A drip collector ← correct
- A funnel and a tin can
- A sponge
- Suitable absorbent material
Gasoline fuel tanks on small passenger vessels must be installed __________.
- independent of the hull ← correct
- on a level higher than the engine
- in a cool and insulated place
- so the fuel line to the engine leads from a shut-off valve at the bottom of the tank
If it is impractical to use the fill line to sound the fuel tank, then the tank should be fitted with __________. (Small Passenger Vessel Regulations)
- a separate sounding tube or an installed marine type fuel gauge ← correct
- An extra five gallon tank for reserve fuel
- A good air vent of sufficient diameter
- A glass tube to visually observe the fuel
A gasoline fuel tank vent on a small passenger vessel should terminate __________.
- As close to the deck plates as possible
- Below the waterline to eliminate the accumulation of explosive vapors
- Midway between the fuel tank and the engine
- On the hull exterior as high above the waterline as practicable and remote from any hull opening ← correct
On small passenger vessels, fuel lines may be made of __________.
- plastic, rubber, or seamless steel tubing
- stainless steel, iron, or brass
- copper, plastic, stainless steel, or galvanized iron
- annealed tubing of copper, nickel-copper, or copper nickel ← correct
Aboard small passenger vessels, which material may be used for diesel fuel line installations but not for gasoline fuel lines?
- Annealed copper tubing
- Nickel-copper tubing
- Copper-nickel tubing
- Seamless steel pipe or tubing ← correct
On small passenger vessels, what type of devices are required at both the tank and engine connections of all internal combustion engine fuel lines?
- Clean out plates
- Fuel gauges
- Drain valves
- Shut-off valves ← correct
On small passenger vessels, drains or outlets for drawing off diesel fuel from water traps or strainers __________.
- must be located at the lowest portion of the tank
- must have only a gravity-forced flow
- must be extended to an external area of the hull
- are permitted ← correct
According to 46 CFR Subchapter T, rigid plastic and other nonmetallic piping materials __________.
- may replace metal pipe or tubing in any installation
- may not be used on inspected vessels
- may only be used in non-vital systems ← correct
- are preferable to steel pipe
Lead-acid batteries used aboard "T-Boats" must have terminal connections that are __________.
- the spring slip style
- a permanent type ← correct
- located so as to be easily greased
- temporarily clamped on the top of the battery
According to 46 CFR Subchapter T, where practicable carburetor drip collectors should drain to __________.
- the engine air intakes ← correct
- the fuel tanks
- a separate pipe leading to the bilges
- a suitable absorbant material
On small passenger vessels which type of internal combustion engine carburetor does not require a drip collector?
- Updraft
- Two barrel
- Four barrel
- Downdraft ← correct
The accumulation of dangerous fumes generated by the storage batteries is best prevented by __________.
- covering the batteries in a nonconducting, solid enclosure
- mounting the batteries in a position as high as possible
- natural or mechanical ventilation ← correct
- securing the batteries to vibration reducing mounting brackets
A device fitted over the discharge opening on a relief valve consisting of one or two woven wire fabrics is called a flame __________.
- stopper
- screen ← correct
- filter
- restrictor
If a vessel is not equipped with an automatically- activated emergency lighting system, the vessel must be __________. (small passenger vessel regulations)
- operated only in daylight hours
- provided with gasoline or kerosene lights
- equipped with luminous tape markings on emergency equipment
- equipped with individual battery- powered lights ← correct
It is recommended that drip collectors required on all updraft carburetors be drained by __________. (small passenger vessel regulations)
- a device to automatically return all drip to the engine air intakes ← correct
- no means whatsoever
- a separate pipe leading to the bilges
- a pump leading to a point outside the hull
Air-cooled radiators for gasoline propulsion engine cooling __________. (small passenger vessel regulations)
- must be approved for marine use
- must have a double fan installation
- must be filled with fresh water
- are permitted on vessels less than 65 feet carrying not more than 12 passengers ← correct
What is required for a dry exhaust pipe? (small passenger vessel regulations)
- Noncombustible hangers and supports ← correct
- Insulation from combustible material
- An automatic damper
- A rain spray and spray cap
Gasoline fuel tank vents should terminate __________.
- in the engine compartment
- in the fuel tank space
- above or outside the hull ← correct
- at the most convenient location
You discover a leak in the fuel line to the engine. You should FIRST __________.
- activate the CO2 system
- make a temporary repair with canvas or tape
- start the bilge pump
- close the fuel valve at the tank ← correct
Which device is required in the fuel supply line at the engine?
- Flow meter
- Shut-off valve ← correct
- Pressure gauge
- Filter
Radiotelephone Communications
24 questions · 6% of the paper
What is maximum power allowed by the FCC for VHF-FM radio transmissions?
- 1 watt
- 5 watts
- 15 watts
- 25 watts ← correct
If you know that the vessel you are about to call on the VHF radio maintains a radio watch on both the working and the calling frequencies, which frequency should you call on?
- Calling frequency
- Working frequency ← correct
- Distress frequency
- Urgency frequency
What is the average range of vessel-to-vessel VHF-FM radio communications?
- 15 to 20 miles ← correct
- 60 to 90 miles
- 90 to 120 miles
- 120 to 150 miles
The national distress, safety, and calling frequency is channel __________.
- 13
- 16 ← correct
- 18
- 22
A ship's radiotelephone station license is issued by the __________.
- U.S. Coast Guard
- Federal Communications Commission ← correct
- Radio Technical Commission for Marine Services
- Maritime Mobile Service Commission
A message warning of a tropical storm should be sent as a(n) __________.
- routine message
- urgent message
- distress message
- safety message ← correct
A message giving warning of a hurricane should have which prefix when sent by radiotelephone?
- Pan-Pan (3 times)
- Securite Securite Securite ← correct
- TTT TTT TTT
- No special prefix
The Coast Guard broadcasts routine weather reports on channel __________.
- 13
- 9A
- 22A ← correct
- 44
If you wished to transmit a message by voice concerning the safety of navigation, you would preface it by the word __________.
- Mayday
- Pan-pan
- Securite ← correct
- Safety
You hear on the radiotelephone the word "Securite" spoken three times. This indicates that __________.
- a message about the safety of navigation will follow ← correct
- a message of an urgent nature about the safety of a ship will follow
- the sender is in distress and requests immediate assistance
- you should secure your radiotelephone
The radiotelephone safety message urgently concerned with safety of a person would be prefixed by the word __________.
- Mayday
- Pan ← correct
- Safety
- Interco
Your vessel has been damaged and is taking on water, but you do not require immediate assistance. You would preface a message advising other vessels of your situation with __________.
- Mayday-Mayday- Mayday
- Pan-Pan (3 times) ← correct
- Securite-Securite- Securite
- SOS-SOS-SOS
In radiotelephone communications, the prefix PAN- PAN indicates that __________.
- a ship is threatened by grave and imminent danger and requests immediate assistance
- a calling station has an urgent message about the safety of a person ← correct
- the message following the prefix will be about the safety of navigation
- the message following is a meteorological warning
Under the "Vessel Bridge-to-Bridge Radiotelephone Act", the maximum power of all transmitters used shall be not more than __________.
- 25 watts ← correct
- 50 watts
- 75 watts
- 100 watts
What is the normal operating power for ship-to-ship communications on channel 13?
- 1 watt or less ← correct
- 5 watts
- 10 watts
- 20 watts
A Coast Guard radiotelephone message about an aid to navigation that is off station is preceded by the word __________.
- "PAN-PAN"
- "MAYDAY"
- "SOS"
- "SECURITY" ← correct
Which word is an international distress signal when transmitted by radiotelephone?
- Securite
- Mayday ← correct
- Breaker
- Pan
What is the minimum size power-driven vessel, not engaged in towing, required to comply with the vessel bridge-to-bridge radiotelephone regulations?
- 50 meters
- 25 meters
- 20 meters ← correct
- 12 meters
You see an iceberg that has not been reported. What kind of radio message do you transmit to warn others?
- Safety message ← correct
- Urgency message
- Distress message
- Routine message
What is the calling and distress frequency on a single side band (SSB) marine radiotelephone?
- 1492 kHz
- 1892 kHz
- 2082 kHz
- 2182 kHz ← correct
What is maximum power allowed by the FCC for VHF- FM radio transmissions?
- One watt
- Five watts
- 15 watts
- 25 watts ← correct
The radiotelephone urgency signal is __________.
- mayday
- pan pan ← correct
- securite
- seelonce feenee
Which towing vessels are NOT required to have an internal communication system between the engine room and the operating station?
- Twin-screw vessels that have operating station control for both engines ← correct
- Vessels on limited routes
- Fleet boats making or breaking tows
- Vessels serving a single company or facility
You receive a call from the U.S. Coast Guard addressed to all stations. The call begins with the words "Pan-Pan" (3 times). Which type of emergency signal would this be?
- Safety signal
- Urgency signal ← correct
- Distress signal
- Red alert signal
Maritime Law, Certificates and Documents
29 questions · 4% of the paper
Which is the requirement for the name and hailing port of a documented commercial vessel?
- It is required to be marked on the stern with the name of the vessel marked on both bows ← correct
- It is required to be marked on the keel, stern, and both bows
- It is required to be marked on both bows and on the keel
- It is not required to be marked anywhere on the vessel
What is the period of validity of a Merchant Mariner Credential?
- 2 years
- 1 year
- 5 years ← correct
- 3 years
The lowest temperature at which a liquid will give off sufficient vapors to form a flammable mixture with air is known as the __________.
- fire point
- flash point ← correct
- lower explosive limit
- threshold limit value
Holes in the bulwark, which allow deck water to drain into the sea, are __________.
- doggers
- fidleys
- freeing ports ← correct
- swash ports
Which document lists all the lifesaving equipment required for a vessel?
- Certificate of Inspection ← correct
- American Bureau of Shipping Classification Certificate
- International Convention for the Safety of Life at Sea Certificate
- Certificate of Registry
All U.S. Flag vessels engaged in foreign trade are required to have a(n) __________.
- enrollment
- license
- registry ← correct
- sea letter
The official number of a documented vessel is __________.
- not required to be marked anywhere on the vessel
- required to be permanently marked on the vessel's structure ← correct
- required to be painted on the vessel's stern
- required to be painted on the vessel's bow
The name and hailing port of a documented commercial vessel is __________.
- not required to be marked anywhere on the vessel
- required to be marked on both bows and on the keel
- required to be marked on the stern with the name of the vessel marked on both bows ← correct
- required to be marked on the keel, stern, and both bows
You are in port A in the United States, and your Certificate of Inspection has expired. You wish to go to port B in the United States for repairs and to complete the inspection. If the Officer-in-Charge Marine Inspection deems it safe, he may issue a __________.
- Certificate of Seaworthiness
- Limited Certificate of Inspection
- Temporary Certificate of Inspection
- Permit to Proceed ← correct
Your vessel has completed an inspection for certification and is issued a temporary certificate. This __________.
- expires six months after it is issued
- must be exchanged for a regular Certificate of Inspection before going foreign or out of state
- has the full force of a regular Certificate of Inspection ← correct
- must be posted in the vicinity of the officers' licenses
Which document shows the minimum required crew a vessel must have to navigate from one port in the United States to another?
- Articles
- Certificate of Inspection ← correct
- Crew List
- Register
Your vessel has completed an inspection for certification and is issued a Temporary Certificate of Inspection. The Temporary Certificate __________.
- has the full force of the regular Certificate of Inspection ← correct
- expires six months after it is issued
- must be exchanged for a regular Certificate of Inspection within 3 months
- is retained in the custody of the Master
You are signing on crew members. The minimum number of people required aboard, and the qualifications of each, is listed on the __________.
- Crew list
- Certificate of Inspection ← correct
- Articles of Agreement
- fo'c'sle card
To determine the number of portable fire extinguishers required on an inspected vessel, you should check the __________.
- hot work permit
- Certificate of Inspection ← correct
- Safety of Life at Sea Certificate
- Muster List ("Station Bill")
You are signing on a crew. You can determine the minimum number and qualifications of the crew that you are required to carry by consulting which document?
- Crew list
- Certificate of Inspection ← correct
- Articles of Agreement
- fo'c'sle card
Before welding in a tank that has carried petroleum products, the tank must be certified by __________.
- the Coast Guard
- the American Bureau of Shipping
- the shipyard fire department
- a certified marine chemist ← correct
In weighing CO2 cylinders, they must be recharged if weight loss exceeds __________.
- 10% of weight of full bottle
- 15% of weight of full bottle
- 20% of weight of charge
- 10% of weight of charge ← correct
In the small passenger vessel regulations a coastwise route is defined as one that is __________.
- not more than 50 statute miles from shore in the Gulf of Mexico
- on ocean waters more than 200 nautical miles from shore in the Gulf of Alaska
- not more than 20 statute miles from the nearest safe harbor in the Pacific Ocean
- not more than 20 nautical miles offshore in the ocean ← correct
The maximum number of passengers a "T-Boat" may carry __________.
- is stated on the vessel's Certificate of Inspection ← correct
- is the number authorized in the Navigation Rules
- depends on the number of lifejackets you carry
- is the number authorized by your license
A damaged "T-Boat" that is unable to meet the requirements of its Certificate of Inspection but is able to travel to a shipyard under its own power should __________.
- make the trip only after obtaining a "Permit to Proceed to Another Port for Repair", Form CG-948 ← correct
- get underway as soon as possible
- hire a tug and pilot instead
- request an Expiration Certificate if the vessel displays a tendency to sink
How do you know how many passengers you may carry? (small passenger vessel regulations)
- As many as possible
- The amount on the Certificate of Inspection ← correct
- Use your own judgment
- No more than 40 passengers
A small passenger vessel engaging in international voyages must be dry docked at least once every __________.
- 6 months
- 12 months ← correct
- 36 months
- 60 months
Whenever practicable, the Certificate of Inspection must be posted __________. (small passenger vessel regulations)
- as high as feasible in the pilot house
- near the area where passengers embark
- in any location desired
- in a conspicuous place where it will most likely be observed by the passengers ← correct
The Certificate of Inspection issued to a vessel carrying more than six passengers must be __________. (small passenger vessel regulations)
- posted on board under glass, if practical ← correct
- posted on the dock where passengers are embarked
- retained at the owner's principal place of business
- kept on file by the Collector of Customs
When a vessel is not in compliance with its Certificate of Inspection, which certificate may be issued to allow its movement to a repair facility? (small passenger vessel regulations)
- Change of Employment
- Permit to Proceed ← correct
- Application for Inspection
- Temporary Certificate of Inspection
Which document will describe lifesaving equipment located aboard your vessel?
- Muster List ("Station Bill")
- Certificate of Inspection ← correct
- Forecastle Card
- Clearance Papers
The inspection of small passenger vessels of 60 feet in length carrying more than twelve persons on an international voyage is required by the Coast Guard __________. (small passenger vessel regulations)
- once every 6 months
- once every year ← correct
- once every 2 years with a minimum of one reinspection during that period
- once every 3 years with a minimum of two reinspections during that period
The distance between the bottom of the hull and the waterline is called __________.
- tonnage
- reserve buoyancy
- draft ← correct
- freeboard
For an upright vessel, draft is the vertical distance between the keel and the __________.
- waterline ← correct
- freeboard deck
- Plimsoll mark
- amidships section
Pollution Prevention and Sanitation
5 questions · 4% of the paper
Which method requires prior approval to be used when cleaning up an oil spill?
- Sorbent booms
- Suction equipment
- Chemical agents ← correct
- Skimmers
The Federal Water Pollution Control Act requires the person in charge of a vessel to immediately notify the Coast Guard as soon as he knows of any oil discharge. Failure to notify the Coast Guard can lead to a monetary fine and imprisonment up to what duration?
- 5 years ← correct
- 3 years
- 2 years
- 1 years
Which type of marine sanitation device (MSD) is used solely for the storage of sewage and flush water at ambient air pressure and temperature?
- Type I
- Type II
- Type III ← correct
- Type IV
If you fail to notify the Coast Guard of an oil spill, you may be imprisoned up to __________.
- 1 year
- 2 years
- 3 years
- 5 years ← correct
The Federal Water Pollution Control Act requires the person in charge of a vessel to immediately notify the Coast Guard as soon as he knows of any oil discharge. Failure to notify the Coast Guard can lead to a monetary fine and imprisonment up to __________.
- 5 years ← correct
- 3 years
- 2 years
- 1 years
Man Overboard
6 questions · 2% of the paper
On a small boat, if someone fell overboard and you did not know over which side the person fell, which action should you take?
- Immediately reverse the engines
- Increase speed to full to get the vessel away from the person
- First put the rudder hard over in either direction
- Stop the propellers from turning and throw a ring buoy over the side ← correct
You are doing a Williamson turn. Your vessel has swung about 60° from the original course heading. You should __________.
- put the rudder amidships and check the swing
- stop the engines and prepare to maneuver to pick up the man in the water
- shift your rudder ← correct
- increase to maximum speed
In a Williamson turn, the rudder is put over full until the __________.
- vessel has turned 90°From her original course
- vessel has turned 60°From her original course ← correct
- vessel is on a reciprocal course
- emergency turn signal sounds
The biggest problem you generally encounter while towing a single tow astern is __________.
- the catenary dragging on the bottom
- swamping of the tow
- the tow tending to dive
- yaw ← correct
You are in a tank wearing the self-contained breathing apparatus and you desire to return topside. How many tugs of the lifeline mean to take up the slack?
- One
- Two
- Three ← correct
- Four
What is the spoken emergency signal for a "man overboard" on the VHF radio?
- Man Overboard
- Security
- Mayday
- Pan-Pan ← correct
Emergency Towing
17 questions · 2% of the paper
The vessel shown in illustration D025DG has broken down and you are going to take her in tow. The wind is coming from her starboard beam. You are making more leeway than she. Where should you position your vessel when you start running lines?
This question is asked against Coast Guard illustration D025DG, which we cannot reproduce — the examination drawings are adapted from copyrighted works. To work it you need the illustration in front of you.
- A ← correct
- B
- C
- D
The best line for towing small vessels is __________.
- three strand nylon
- double-braided nylon ← correct
- polypropylene
- manila
A term used to describe the dip in a towline that acts as a shock absorber is __________.
- catenary ← correct
- step
- shock dip
- bight
A towing vessel should be on the crest of a wave at the same time as its tow and in the trough at the same time. The term used to describe this is __________.
- tow strain
- catenary length
- being in step ← correct
- Williamson's Tow
A monkey fist is found on a __________.
- heaving line ← correct
- lead line
- manrope
- mooring line
In towing it is desirable for the tug and the tow to ride wave crests simultaneously because __________.
- shock loading on the tow line is reduced ← correct
- towing speed is improved
- the tow is more visible from the tug
- the catenary of the towline is reduced
Chafing gear is used to _________.
- increase mechanical advantage on a towing recovery wheel
- eliminate yawing of disabled tow
- protect towlines from wearing down against edges of vessel ← correct
- connects towline to trailer eye of disabled tow
When towing another vessel, the length of the towing line should be __________.
- as long as possible
- as short as possible under the circumstances and not over two wave lengths
- such that one vessel will be on a crest while the other is in a trough
- such that the vessels will be in step ← correct
A safety shackle is identified by its __________.
- shape
- pin ← correct
- certification stamp
- color code
The effect of ocean current is usually more evident on a tug and tow than on a tug navigating independently because the __________.
- speed of the tug and tow is less ← correct
- towline catches the current
- current causes yawing
- current will offset the tow
Under the forces of its own weight, the suspended length of line will fall into a shape known as a __________.
- polygon
- holding arc
- catenary curve ← correct
- parabolic curve
Catenary as applied to tow lines denotes the __________.
- dip of the line ← correct
- stretch of the line
- strain on the line
- length of the line
The lead of a tow bridle is usually redirected with a __________.
- bollard
- chock ← correct
- pad eye
- devil's claw
A tow that veers to the side on the end of the towline is said to __________.
- yaw ← correct
- surge
- sway
- swing
When a two-leg sling is used to lift a load, a sling 40 feet long is better than one of 30 feet because the __________.
- tension in the sling legs is less ← correct
- load can be lifted higher
- sling will be easier to attach
- sling will be easier to remove
The choice of length of tow bridle legs is governed by the __________.
- expected towing forces
- capability of retrieving gear
- freeboard of the unit being towed
- need to reduce yaw ← correct
When towing another vessel astern, the length of the towline should be __________.
- as long as possible
- such that one vessel will be on a crest while the other is in a trough
- such that the vessels will be "in step" ← correct
- not over two wave lengths in seas up to 10 feet
Distress and Special Signals
8 questions · 2% of the paper
Which visual distress signal is acceptable for daylight use only?
- Hand-held red flare
- Red aerial pyrotechnic flare
- Self-contained rocket-propelled parachute red flare
- Hand-held orange smoke distress flare ← correct
A vessel in distress should send by radio telephone the two tone alarm signal followed immediately by the __________.
- distress position
- spoken words "Mayday, Mayday, Mayday" ← correct
- ship's name
- ship's call letters
You are underway in the Gulf of Mexico when you hear a distress message over the VHF radio. The position of the sender is about 20 miles south of Galveston, TX, and you are about 80 miles ESE of Galveston. What action should you take?
- Immediately acknowledge receipt of the distress message
- Defer acknowledgment for a short interval so that a coast station may acknowledge receipt ← correct
- Do not acknowledge receipt until other ships nearer to the distress have acknowledged
- Do not acknowledge receipt because you are too far away to take action
What is the international distress frequency for radiotelephones?
- 500 kHz
- 1347 kHz
- 2182 kHz ← correct
- 2738 kHz
Messages concerning weather conditions transmitted by radiotelephone are preceded by __________.
- MAYDAY
- PAN-PAN
- SECURITE ← correct
- SOS
What should you do if you have transmitted a distress call a number of times on channel 16 and have received no reply?
- Repeat the message using any other channel on which you might attract attention. ← correct
- Key the microphone several times before transmitting again.
- Turn up the volume on the receiver before transmitting again.
- Report the problem to the head electrician.
You are underway in mid-ocean, when you hear a distress message over the VHF radio. The position of the sender is 20 miles away. What action should you take?
- Immediately acknowledge receipt of the distress message. ← correct
- Defer acknowledgment for a short interval so that a coast station may acknowledge receipt.
- Do not acknowledge receipt until other ships nearer to the distress have acknowledged.
- Do not acknowledge because you are too far away to take action.
What is the spoken emergency signal for a distress signal over a VHF radio?
- Red Alert
- Security
- Mayday ← correct
- Pan
Emergency Procedures
4 questions
You are trying to rescue survivors from a wrecked vessel on fire. You should approach __________.
- to leeward of the wrecked vessel
- at a speed of at most one-half that of the wrecked vessel
- at a speed of at least that of the wrecked vessel
- to windward of the wrecked vessel ← correct
One of your crew members falls overboard from the starboard side. You should IMMEDIATELY __________.
- apply left rudder
- throw the crew member a life preserver ← correct
- begin backing your engines
- position your vessel to windward and begin recovery
On a small boat, if someone fell overboard and you did not know over which side the person fell, you should __________.
- immediately reverse the engines
- stop the propellers from turning and throw a ring buoy over the side ← correct
- increase speed to full to get the vessel away from the person
- first put the rudder hard over in either direction
What must be mounted at a small passenger vessel's operating station for use by the Master and crew?
- Emergency Instructions ← correct
- A tide table for the area
- Instructions on artificial respiration
- The location of the first aid kit
Practice only — this is not a Coast Guard examination and passing it certifies nothing. Questions marked as real examination questions are from the National Maritime Center's current sample examination for Q170. The rest are from the Coast Guard's own examination bank as it stood before it was withdrawn, each kept only after its answer was checked against the current regulation or Coast Guard publication named beneath it; questions the current material could not settle were left out.