USCG Safety: Master's License

This is an interactive test. Read each question and select the proper answer by clicking on the appropriate answer. If a "Y" appears, your choice is correct. If a "N" appears, more study may be in order.


13: Your liferaft is to leeward of a fire on the water and riding to its sea anchor. You should FIRST __________.


57: The minimum concentration of a vapor in air which can form an explosive mixture is called the __________.


61: You are towing a 1000 gross ton gasoline tank barge. The barge is NOT gas free. Regulations say that the cargo tank hatches, ullage holes, and Butterworth plates on the barge may remain open without flame screens __________.


101: On a vessel of 10,000 tons displacement, compute the reduction in metacentric height due to free surface in a hold having free water on the tank top. The hold is 40 feet long and 50 feet wide. The reduction in metacentric height is __________.

    N a. 1.1 feet
    Y b. 1.2 feet
    N c. 1.3 feet
    N d. 1.5 feet

156: The Coast Guard determines how many passengers are permitted on a "T-Boat" by applying the __________.

    N a. "Length of Rail" criteria, allowing 30 inches of rail space along the vessel's sides and transom for each passenger
    N b. "Deck Area" criteria that permits one passenger for every 10 square feet of deck space available for passenger use
    N c. "Fixed Seating" criteria that allocates 18 inches of space for each passenger to rest his/her buttocks upon
    Y d. Any or a combination of the above criteria

307: Your ship is returning to New Orleans from a foreign voyage and carrying a bulk cargo of anhydrous ammonia. You must notify the Captain of the Port, New Orleans, __________.

    Y a. at least 96 hours before entering port
    N b. if you are not participating in the USMER system
    N c. only if you have a hazardous condition aboard
    N d. only if your arrival will vary more than six hours from your ETA reported to AMVER

662: Foam extinguishes a fire mainly by __________.

    N a. cooling
    N b. chemical action
    Y c. smothering
    N d. inerting the air

685: The operator of each vessel engaged in a vessel-to-vessel oil transfer operation must keep a signed copy of the declaration of inspection for __________.

    N a. 10 days
    Y b. 1 month
    N c. 6 months
    N d. 1 year

769: A life float on a fishing vessel must be equipped with __________.

    Y a. a painter
    N b. red smoke flares
    N c. a jackknife
    N d. a signal mirror

781: How is the external flotation bladder of an immersion suit inflated?

    N a. It is inflated by a small CO2 bottle that is automatically tripped when the front zipper is at the top of the zipper track.
    N b. It is inflated by a small CO2 bottle that is manually tripped.
    Y c. It is inflated by blowing through an inflation tube.
    N d. It inflates by sea water bleeding into the flotation bladder and reacting with a chemical therein.

844: If a crew member that was ill has died, which code should your message contain?

    N a. MPO
    Y b. MPR
    N c. MPK
    N d. MPJ

1219: 46 CFR Subchapter T requires that rigid plastic or other nonmetallic piping __________.

    N a. only be used in non-vital systems
    N b. not be used in gasoline or diesel fuel systems
    N c. have approved metallic fittings and cutoff valves where it penetrates a watertight deck or bulkhead
    Y d. All of the above

1224: In order to retrieve an inflatable liferaft and place it on deck, you should heave on the __________.

    N a. lifelines
    N b. righting strap
    N c. sea anchor
    Y d. towing bridle

1233: The owner, agent, Master or person-in-charge of a small passenger vessel involved in a marine casualty is NOT required to notify the Coast Guard in cases where there is __________.

    N a. property damage less than $25,000
    N b. no injury which requires more than first aid treatment
    N c. death or injury to a shipyard worker or harbor worker not resulting from the vessel casualty
    Y d. All of the above

1317: The most effective way of applying carbon dioxide from a portable extinguisher to a fire is by __________.

    N a. forming a cloud cover over the flames
    Y b. directing the gas at the base of the flames in a slow sweeping motion
    N c. discharging the carbon dioxide into the heart of the flames
    N d. bouncing the discharge off an adjacent bulkhead just above the burning surface

1354: If the hydrostatic release mechanism for an inflatable liferaft is not periodically serviced and becomes inoperative, it will NOT __________.

    N a. set the water lights on immersion
    N b. release the dye-marker from the liferaft
    Y c. free the liferaft from a sinking vessel
    N d. break the seal on the carbon dioxide cylinder

1480: You are on a supply run to an offshore drilling rig. On board is the cargo listed. What is the height above the main deck of the center of gravity of the cargo? ST-0039

    N a. 2.23 feet
    N b. 1.93 feet
    N c. 1.82 feet
    Y d. 1.38 feet

1665: Which statement about stowing spare hose is TRUE?

    Y a. Fold the hose so that the male coupling is about 4 feet from the female coupling, then roll it up.
    N b. Roll the hose starting at the female end.
    N c. Roll the hose starting at the male end.
    N d. Fold the hose into lengths about 6 feet long and then lash the folds together.

2131: When a person is in shock, their skin will be __________.

    N a. warm and dry
    N b. warm and damp
    N c. cold and dry
    Y d. cold and damp

2337: Sideways movement of the mast is resisted by the __________.

    Y a. shrouds
    N b. halyards
    N c. sheets
    N d. forestay

2505: The helicopter deck of a MODU must be marked with the units identification, appropriate aiming circles, and a continuous line on the perimeter which is __________.

    N a. 8 inches wide
    Y b. 16 inches wide
    N c. 24 inches wide
    N d. 32 inches wide

2513: The maximum number of personnel allowed on a personnel transfer basket is __________.

    N a. 2
    N b. 3
    Y c. 4
    N d. 5

2525: The SS AMERICAN MARINER is ready to sail with the load shown. Use the white pages of The Stability Data Reference Book to determine the available GM. ST-0068

    N a. Available GM 5.26 ft
    N b. Available GM 4.24 ft
    Y c. Available GM 4.11 ft
    N d. Available GM 4.01 ft

2530: Regulations require that cargo pumprooms on tank barges (constructed in 1965) carrying grades B or C liquid cargoes have power ventilation systems which can completely change the air in __________.

    N a. 1 minute
    Y b. 3 minutes
    N c. 5 minutes
    N d. 10 minutes

2674: Use the floodable length curve in Section 1, the blue pages, of the Stability Data Reference Book. If the curve represents 45 percent permeability and number 2 hold floods, the vessel will sink if the permeability exceeds what percent?

    N a. 76
    Y b. 67
    N c. 60
    N d. 52

2844: Your vessel's drafts are: FWD 27'-06", AFT 28'-02"; and the KG is 23.1 feet. Use the selected stability curves in the blue pages of the Stability Data Reference Book to determine the righting arm at 37° inclination if the center of gravity is 1.8 feet off center.

    Y a. 0.4 foot
    N b. 1.4 feet
    N c. 1.8 feet
    N d. 2.6 feet

3014: Using the information in Section 1, the blue pages, of the Stability Data Reference Book, determine the danger angle for permanent list if the KG is 21.8 feet and the drafts are: FWD 19'-05", AFT 20'-01".

    N a. 52°
    N b. 45°
    N c. 31°
    Y d. 26°

3269: What is the purpose of the liferaft's hydrostatic release?

    Y a. To release raft automatically as the ship sinks
    N b. To inflate the raft automatically
    N c. To test rafts hydrostatically
    N d. None of the above

3293: Your sailing vessel is docked during a storm and is in continuous motion. If a mooring line parts due to vessel motion, it will most likely do so __________.

    N a. where it is made fast on the vessel
    N b. midway between the vessel and the dock
    N c. at the eye
    Y d. at the chock

3336: Which statement is TRUE concerning gasoline vapors on board a vessel?

    Y a. They are heavier than air and will settle in the lowest part of the vessel.
    N b. They are lighter than air and will settle in the highest part of the vessel.
    N c. They should be vented into the engine to improve combustion.
    N d. They should be vented into the wheelhouse.

3347: The DEEP DRILLER is level at a draft of 60 feet in calm water. What is the value of the righting moment?

    N a. 18,118 foot-tons
    N b. 9,059 foot-tons
    N c. 4,529 foot-tons
    Y d. 0 foot-tons

3352: Which personal lifesaving device(s) is(are) approved for use on a towboat 150 feet in length? (Uninspected Vessel Regulations)

    Y a. Life preserver
    N b. Buoyant vest or cushion
    N c. Special purpose safety device
    N d. All of the above

3409: To launch a liferaft by hand, you should __________.

    N a. cut the casing bands, throw the raft over the side and it will inflate by itself
    N b. detach the operating cord, throw the liferaft over the side and it will then inflate
    N c. cut the casing bands, throw the raft over the side and pull the operating cord
    Y d. throw the liferaft over the side and pull the operating cord

3547: The SS AMERICAN MARINER is ready to sail with the load shown. Use the white pages of The Stability Data Reference Book to determine the available GM. ST-0139

    Y a. Available GM 3.5 ft
    N b. Available GM 3.9 ft
    N c. Available GM 4.3 ft
    N d. Available GM 4.8 ft

3594: After having activated the emergency position indicating radio beacon, you should __________.

    N a. turn it off for 5 minutes every half-hour
    N b. turn it off and on at 5 minute intervals
    N c. turn it off during daylight hours
    Y d. leave it on continuously

3760: Symptoms of sea sickness include __________.

    N a. fever and thirst
    Y b. nausea and dizziness
    N c. stomach cramps and diarrhea
    N d. reddening of skin and hives

3780: One of the first actions to be taken by survivors when they have boarded an inflatable liferaft is to __________.

    N a. stream the sea anchor
    Y b. take an anti-seasickness pill
    N c. open the pressure relief valve
    N d. drink at least one can of water

3848: Each personal flotation device light on an OSV that has a non-replacement power source must be replaced __________.

    N a. every six months after initial installation
    N b. every 12 months after initial installation
    N c. every 24 months after initial installation
    Y d. on or before the expiration date of the power source

3873: On the DEEP DRILLER, among the starboard-side valves to open when deballasting from ballast tank 8S is valve __________.

    N a. 7
    N b. 8
    Y c. 17
    N d. 18

3875: The breaking strength of the service lines of the rockets used with an impulse-projected, rocket type line throwing appliances is __________.

    N a. 300 lbs
    Y b. 500 lbs
    N c. 1000 lbs
    N d. 1500 lbs

4006: The SS AMERICAN MARINER arrived in port with drafts of: FWD 18'-06", AFT 20'-10". Cargo was loaded and discharged as indicated. Use sheet 2 in the white pages of the Stability Data Reference Book to determine the final drafts. ST-0152

    N a. FWD 18'-11", AFT 20'-02"
    N b. FWD 19'-01", AFT 20'-00"
    N c. FWD 19'-03", AFT 19'-10"
    Y d. FWD 19'-05", AFT 19'-08"

4049: The owner or Master of a towing vessel shall ensure that all tests and inspections of gear take place and are logged ___________ .

    N a. on each watch, immediately before being relieved
    Y b. before embarking on a voyage of more than 24 hours
    N c. daily, at 1200 local zone time
    N d. weekly, before 0000 Sunday

4140: In an electro-hydraulic steering system, rudder movement is maintained in close synchronization with the steering wheel position by means of the __________.

    N a. trick wheel
    Y b. follow-up control
    N c. six-way valve
    N d. Rapson slide

4173: The DEEP DRILLER, loaded as shown in the Sample Load Form #4 (Drilling), discharges all the cement in the P-Tanks. See Table 7. What is the change in KG?

    N a. 0.24 foot downward
    Y b. 0.49 foot downward
    N c. 0.88 foot downward
    N d. 1.02 feet downward

4187: The DEEP DRILLER is drilling at 60 feet draft at a corrected KG of 54.0 feet. Ballast added or discharged to remain at a constant draft is at a VCG of 10 feet. How much non-liquid load would have to be removed from an average height of 130 feet above the keel to meet the maximum allowable KG at a draft of 60 feet for winds greater than 70 knots?

    N a. 1283 long tons
    N b. 817 long tons
    N c. 679 long tons
    Y d. 302 long tons

4252: Which statement about immersion suits is TRUE?

    N a. The suit's oil resistance is such that it will be serviceable and be usable after exposure to gasoline or mineral spirits without needing to be specially treated.
    N b. The suit seals in body heat and provides protection against hypothermia indefinitely.
    N c. The suit is flameproof and provides protection to the wearer while swimming through burning oil.
    Y d. The suit must, without assistance, turn an unconscious person's mouth clear of the water within 5 seconds.

4637: How much drill water should be transferred from tanks #23 and #24 to tank #1 to level the COASTAL DRILLER, in transit at a draft of 10 feet 6 inches, if the total longitudinal moments are 1,700,000 ft-kips?

    N a. 438 kips
    Y b. 451 kips
    N c. 521 kips
    N d. 537 kips

5388: The most likely location for a liquid cargo fire to occur on a tanker would be __________.

    Y a. in the pumproom
    N b. at the vent header
    N c. at the main deck manifold
    N d. the midships house

5565: What is the bow type anchor shackle primarily used for?

    N a. Chain to chain connections
    N b. Chain to anchor connections
    N c. Kenter link to anchor connections
    Y d. Wire rope connections

6003: The minimum number of portable C-II fire extinguishers required on the drill floor of a MODU is __________.

    N a. 1
    Y b. 2
    N c. 3
    N d. 4

6022: You are in a tank wearing a breathing apparatus and you desire to return topside. How many tugs of the lifeline mean "Take up slack"?

    N a. 1
    N b. 2
    Y c. 3
    N d. 4

6275: During a storm, the mooring line on a MODU should be long enough so that the angle between the anchor shank and the ocean floor is __________.

    Y a. 0°
    N b. 30°
    N c. 60°
    N d. 90°

7023: Heat exhaustion is caused by excessive __________.

    N a. loss of body temperature
    Y b. loss of water and salt from the body
    N c. gain in body temperature
    N d. intake of water when working or exercising

7105: Combustible gas indicators measure the presence of combustible gas as a percentage of the __________.

    N a. flash point
    N b. upper explosive limit
    Y c. lower explosive limit
    N d. fire point

7129: 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 __________.

    N a. 15 seconds
    Y b. 20 seconds
    N c. 45 seconds
    N d. 90 seconds

7647: The abbreviation GM is used to represent the __________.

    N a. height of the metacenter
    N b. righting arm
    N c. righting moment
    Y d. metacentric height

8833: A jack-up level at 12.5 feet draft transfers 100 kips of drill water from a tank with a TCG of -30 feet to a starboard tank with a TCG of 70 feet. The resulting starboard draft is 13 feet. The moment required to change list one inch (MCL1") is __________.

    N a. 667 foot-kips
    Y b. 833 foot-kips
    N c. 1,400 foot-kips
    N d. 1,667 foot-kips

8997: Aboard a vessel, multiplying a load's weight by the distance of the load's center of gravity from the centerline results in the load's __________.

    N a. TCG
    Y b. transverse moment
    N c. righting moment
    N d. transverse free surface moment

9101: Recharging a previously used cartridge-operated dry-chemical extinguisher is accomplished by __________.

    N a. authorized fire equipment servicing personnel only
    Y b. replacing the propellant cartridge and refilling with powder
    N c. puncturing the cartridge seal after installation
    N d. recharging the cartridge and refilling it with powder

9235: The longitudinal free surface moments of a drilling mud pit aboard a MODU displacing 24,000 long tons in sea water is 1,200 ft-long tons. If the sounding level in the mud pit is reduced from 8 to 6 feet and the mud weight increases from 10 to 12 lbs/gallon, what is the new FSML for the mud pit?

    N a. 750 ft-long tons
    N b. 1,000 ft-long tons
    Y c. 1,440 ft-long tons
    N d. 1,920 ft-long tons