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.


254: If you wanted to ask a nearby vessel if he had a doctor on board, you would hoist the flag signal __________.


389: On a vessel of 9,000 tons displacement, compute the reduction in metacentric height due to free surface in a hold having free water on the tank tops. The hold is 20 feet long and 30 feet wide. The reduction in metacentric height is __________.


412: To get low-velocity fog from an all-purpose nozzle, you would __________.


563: Which item is of the most use in getting a lifeboat away from a moving ship?

    N a. The falls
    Y b. Boat hook
    N c. Boat painter
    N d. Sea painter

580: Freeboard is measured from the upper edge of the __________.

    N a. bulwark
    Y b. deck line
    N c. gunwale bar
    N d. sheer strake

672: A foam-type portable fire extinguisher is most useful in fighting a fire in __________.

    N a. generators
    Y b. oil drums
    N c. the bridge controls
    N d. combustible metals

716: The required amount of water for each person in a lifeboat on an oceangoing vessel, on an international voyage, is __________.

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

750: The center of flotation of a vessel is __________.

    N a. the center of volume of the immersed portion of the vessel
    Y b. the center of gravity of the water plane
    N c. that point at which all the vertical downward forces of weight are considered to be concentrated
    N d. that point at which all the vertical upward forces of buoyancy are considered to be concentrated

829: A fire starting by spontaneous combustion can be expected in which condition?

    N a. Paints, varnish, or other liquid flammables are stowed in a dry stores locker.
    N b. Inert cargoes such as pig iron are loaded in a wet condition.
    Y c. Oily rags are stowed in a metal pail.
    N d. Clean mattresses are stored in contact with an electric light bulb.

925: The center of flotation of a vessel is the geometric center of the __________.

    N a. underwater volume
    N b. above water volume
    N c. amidships section
    Y d. waterplane area

1093: On small passenger vessels, which device(s) must be fitted to a fuel line's tank connection?

    N a. A fuel strainer
    Y b. A shut-off valve
    N c. A tubular glass gauge to indicate the fuel level
    N d. All of the above

1152: Hand tillers are only accepted as an auxiliary means of steering if __________.

    N a. they are at least 6 feet long
    N b. they are not operated through a reduction gear
    Y c. they are found satisfactory by the cognizant OCMI
    N d. Both A and C above

1156: Which statement is TRUE concerning the testing of the line-throwing appliance?

    N a. It shall be fired at least once in every three months.
    Y b. A drill in its use shall be held once in every 3 months.
    N c. Drills shall be held quarterly and it shall be fired annually.
    N d. No drills are required.

1210: The tricing pendants should be released __________.

    N a. before the gripes are removed
    N b. before loading the passengers
    Y c. after loading the passengers
    N d. after the boat is afloat

1223: The survival craft carried aboard a commercial fishing vessel must safely accommodate __________.

    Y a. all of the people aboard
    N b. the number of people required by the certificate of inspection
    N c. the entire crew
    N d. None of the above are correct.

1264: The operating cord on an inflatable liferaft should be renewed by __________.

    N a. removing the top half of the shell, cutting the line at its source, and renewing completely
    N b. cutting the line where it enters the case and replacing that portion
    N c. leaving the original line and tying another one to it so the two lines will take the strain
    Y d. an approved servicing facility ashore

1273: In launching a covered lifeboat, what would safely lower the lifeboat from inside the lifeboat cabin?

    N a. Frapping line
    N b. Tricing line
    N c. Rottmer release
    Y d. Winch remote control wire

1351: While operating off the coast of Greece, a seaman is injured. What indicator should be in the preamble of a radio telegram asking for medical advice from a Greek station?

    Y a. RADIO MEDICAL
    N b. DH MEDICO
    N c. MEDICO ELLAS
    N d. MAYDAY

1415: You are reading the draft marks in illustration D032DG. The water level forward is at the top of the 8, and the mean water level aft is at the top of the 8. What is the mean draft?

    Y a. 8'06"
    N b. 8'03"
    N c. 8'00"
    N d. 7'06"

1442: If the cause of severe list or trim is off-center ballast, counterflooding into empty tanks will __________.

    N a. increase the righting moment
    N b. increase the righting arm
    N c. increase list or trim
    Y d. decrease list or trim

1493: A new liferaft has been installed on your vessel. The operating cord should be __________.

    Y a. attached to the raft stowage cradle or to a secure object nearby with a weak link
    N b. checked to see that it's unattached
    N c. coiled neatly on the raft container
    N d. faked on deck and lead through a chock

1619: A conscious victim who has suffered a blow to the head has symptoms that indicate the possibility of concussion. If the patient feels no indication of neck or spine injury, recommended treatment would include __________.

    N a. turning the victim's head to the side to keep his airway open
    N b. positioning the victim so the head is lower than the body
    N c. giving the victim water if he is thirsty, but no food
    Y d. elevating the head and shoulders slightly with a pillow

1639: What entry would NOT be shown on the V line of an AMVER report?

    N a. NONE
    N b. NURSE
    N c. MD
    Y d. DOCTOR

1717: An inert gas system on a tanker should be used to __________.

    N a. prevent the generation of flammable or combustible gas in tanks
    N b. blow out cargo lines to prevent the build up of gas concentrations
    Y c. dilute tank atmospheres to keep gas concentrations below the lower explosive limit
    N d. prevent fires in the pumproom by continually displacing flammable vapors

1758: A flooded leg on a liftboat would adversely affect the vessel's stability underway by __________.

    N a. increasing the righting moment
    N b. decreasing the vessel's displacement
    N c. increasing the reserve buoyancy
    Y d. shifting the CG (center of gravity) off center

1975: On a commercial fishing vessel, a wearable personal flotation device must be marked with the name of the __________.

    N a. vessel
    N b. assigned individual
    N c. owner of the device
    Y d. Any of the above

1991: It is the responsibility of the person in charge to __________.

    N a. revise the operating manual when rig personnel change
    Y b. be fully aware of the provisions in the operating manual
    N c. maintain the rig's construction portfolio
    N d. All of the above

2046: Your drafts are: FWD 5'-11", AFT 6'-11". From past experience, you know that the vessel will increase her draft 1 inch for every 7 tons loaded. There is rig water on board and 16 tons of deck cargo. How many more tons of cargo can be loaded and still maintain the same trim? (D037DG )

    N a. 8 tons
    N b. 12 tons
    N c. 10 tons
    Y d. 14 tons

2299: The first treatment given to a person overcome by benzene vapor should be to __________.

    Y a. remove them to fresh air
    N b. flush their face with water for about 5 minutes
    N c. stand them up and walk them around
    N d. remove their clothing and wrap them in blankets

2594: 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 3 hold floods, the vessel will sink if the permeability exceeds what percent?

    N a. 64
    N b. 68
    N c. 72
    Y d. 78

2666: Your vessel's drafts are: FWD 18'-09", AFT 20'-05"; and the KG is 23.8 feet. Use the selected stability curves in the blue pages of the Stability Data Reference Book to determine the righting arm at 15° inclination.

    Y a. 0.7 foot
    N b. 1.0 feet
    N c. 1.7 feet
    N d. 3.8 feet

2706: Your vessel's drafts are: FWD 15'-09", AFT 16'-08"; and the KG is 23.6 feet. Use the selected stability curves in the blue pages of the Stability Data Reference Book to determine the angle of list if the center of gravity is shifted 0.9 foot off the centerline.

    Y a. 15°
    N b. 18°
    N c. 21°
    N d. 24°

2721: You are at the helm of a schooner-rigged sailing vessel under sail on the port tack, on a beam reach, with all appropriate sails set and properly trimmed. You are instructed to "bear off quickly". To utilize your sails to assist with the turn, you should __________.

    N a. slack the foresail sheet
    N b. slack the fore-staysail sheet
    N c. slack the jib sheet
    Y d. slack the main sheet

2779: Error may be introduced into a magnetic compass by __________.

    N a. making a structural change to the vessel
    N b. a short circuit near the compass
    N c. belt buckles
    Y d. All of the above

3292: Upon completion of fueling a gasoline driven vessel it is necessary to __________.

    N a. keep ports, doors, windows, and hatches closed
    N b. start engines immediately
    Y c. ventilate before starting engine
    N d. None of the above

3444: The nautical term "lee shore" refers to the __________.

    Y a. shore on the lee side of the vessel
    N b. shore that is in the lee
    N c. western shore of the Lesser Antilles
    N d. shore in a harbor of refuge

3460: How should the letter "T" be pronounced when spoken on the radiotelephone?

    N a. TEE
    N b. TA HO
    Y c. TANG GO
    N d. TU TU

3663: Before deballasting to survival draft in the event of predicted heavy weather, the DEEP DRILLER Operations Manual recommends that the mooring lines be slacked __________.

    N a. 10 feet
    Y b. 20 feet
    N c. 30 feet
    N d. 40 feet

3916: If an inflatable liferaft inflates upside down, you can right it by __________.

    N a. pushing up on one side
    Y b. standing on the CO2 bottle, holding the bottom straps, and throwing your weight backwards
    N c. getting at least three or four men to push down on the side containing the CO2 cylinder
    N d. doing nothing; it will right itself after the canopy supports inflate

3929: What is one of the FIRST things you would do on boarding an inflatable liferaft?

    N a. Open equipment pack.
    N b. Post a lookout.
    N c. Issue anti-seasickness medicine.
    Y d. Pick up other survivors.

3948: While adrift in an inflatable liferaft in hot, tropical weather __________.

    N a. the canopy should be deflated so that it will not block cooling breezes
    N b. the pressure valve may be periodically opened to prevent excessive air pressure
    Y c. deflating the floor panels may help to cool personnel
    N d. the entrance curtains should never be opened

4008: You are preparing to load fuel oil on a vessel of 300 gross tons constructed after June 30, 1974. Before loading, you must check that the fuel oil tank vents __________.

    N a. are not obstructed by on-deck cargo
    N b. have a fire extinguisher within the immediate area
    Y c. have containment capacity for at least one half barrel
    N d. are opened and the flame screen replaced

4245: The maximum load line draft for the COASTAL DRILLER is __________.

    N a. 12 feet 8 inches
    N b. 11 feet 7.2 inches
    Y c. 10 feet 10.5 inches
    N d. 10 feet 8.8 inches

5061: During a move to a new location, a jack-up drilling unit with personnel on board is towed through a heavy rainstorm. What signal must be sounded by the drilling rig when visibility is restricted?

    N a. One prolonged blast
    N b. Two prolonged blasts
    N c. One prolonged and two short blasts
    Y d. One prolonged and three short blasts

5733: Given the same water depth and mooring tension, the length of the ground cable of a 19 pound/foot wire rope mooring line in comparison to a 90 pound/foot mooring chain will be __________.

    Y a. shorter
    N b. identical
    N c. longer
    N d. indeterminable

5934: You are wearing a breathing apparatus inside a tank. How many tugs on the lifeline should you give to indicate that you need help?

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

5951: Control valves of a CO2 system may be located within the protected space when __________.

    N a. it is impractical to locate them outside
    N b. there is also a control valve outside
    Y c. the CO2 cylinders are also in the space
    N d. an automatic heat-sensing trip is installed

6037: When testing fire hoses on offshore drilling units, each hose must be subjected to a test pressure of at least __________.

    Y a. 100 psi
    N b. 110 psi
    N c. 120 psi
    N d. 150 psi

6555: The chemicals in sacks aboard MODU's are palletized to reduce __________.

    Y a. labor in loading and handling
    N b. pilferage
    N c. marking and labeling
    N d. contamination

6858: A hydraulic accumulator is designed to __________.

    Y a. store fluid under pressure
    N b. act as a fluid reservoir
    N c. provide overpressure relief
    N d. replenish fluid to a system

7373: When a semisubmersible rig under tow experiences pounding on the forward transverse brace, the surest way to alleviate the condition would be to __________.

    N a. adjust the length of the tow line
    N b. have the tug slow down
    Y c. ballast down
    N d. change course

7601: At all angles of inclination, the true measure of a vessel's stability is the __________.

    N a. metacentric height
    N b. displacement
    Y c. righting moment
    N d. inclining moment

8121: While at operating draft, the DEEP DRILLER suffers flooding in the port pump room. Both port bilge pumps are inadequate to dewater the pump room. You may supplement the bilge pumps with the __________.

    N a. starboard ballast pump and crossover system
    N b. port ballast pump
    N c. port saltwater service pump
    Y d. port drill water pump

8345: For H2S detection, sensitized tapes indicate H2S presence by means of discoloration of an exposed spot on the tape. The shade of the color on the spot depends upon the concentration of H2S and __________.

    N a. air temperature at the time of the exposure
    N b. air pressure at the time of the exposure
    N c. humidity at the time of exposure
    Y d. duration of the exposure

8665: The DEEP DRILLER, while loaded as shown in the Sample Load Form #5 (Survival) loads an additional 137.88 long tons. The resulting trim by the stern is 2 feet and the list to port is 3 feet. What is the draft at the port forward draft mark?

    N a. 45 feet 6 inches
    N b. 46 feet 0 inches
    Y c. 46 feet 6 inches
    N d. 47 feet 0 inches

8665: The DEEP DRILLER, while loaded as shown in the Sample Load Form #5 (Survival) loads an additional 137.88 long tons. The resulting trim by the stern is 2 feet and the list to port is 3 feet. What is the draft at the port forward draft mark?

    N a. 45 feet 6 inches
    N b. 46 feet 0 inches
    Y c. 46 feet 6 inches
    N d. 47 feet 0 inches

8707: The DEEP DRILLER is loaded as shown in Sample Load Form #4 (Drilling). If port valves 24 and 2 are mistakenly opened, the change in inclination will be increasing trim by the __________.

    Y a. bow with port list
    N b. bow
    N c. stern
    N d. stern with starboard list

8883: The DEEP DRILLER is loaded as shown in the Sample Load Form #1 (Transit). Additional deck load may be placed aboard. If the maximum permissible deck load were placed in the pipe racks at a VCG of 130 feet, the KG increases __________.

    N a. 1.43 feet
    N b. 1.89 feet
    Y c. 2.23 feet
    N d. 2.43 feet

9362: You are releasing carbon dioxide gas (CO2) into an engine compartment to extinguish a fire. The CO2 will be most effective if the __________.

    N a. compartment is closed and ventilators are opened
    N b. compartment is left open to the air
    Y c. compartment is closed and airtight
    N d. air flow to the compartment is increased with blowers

9373: If heavy smoke is coming from the paint locker, the FIRST firefighting response should be to __________.

    N a. release the CO2 flooding system
    N b. open the door to evaluate the extent of the fire
    N c. enter and use a portable extinguisher
    Y d. secure the ventilation