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.


23: Your ship is sinking rapidly. A container containing an inflatable liferaft has bobbed to the surface upon functioning of the hydrostatic release. Which action should you take?


62: The deck water seal of the inert gas system __________.


79: A squeeze-grip type carbon dioxide portable fire extinguisher has been partially discharged. It should be __________.


141: Which emergency is required to be covered at the required periodic drills on a fishing vessel?

    Y a. Recovering an individual from the water
    N b. Steering casualty
    N c. Emergency towing
    N d. Loss of propulsion power

300: In the small passenger vessel regulations a coastwise route is defined as one that is __________.

    N a. not more than 50 statute miles from shore in the Gulf of Mexico
    N b. on ocean waters more than 200 nautical miles from shore in the Gulf of Alaska
    N c. not more than 20 statute miles from the nearest safe harbor in the Pacific Ocean
    Y d. not more than 20 nautical miles offshore in the ocean

356: The number of pounds of carbon dioxide required for each cargo space on a cargo vessel is equal to __________.

    N a. the gross volume of the space in cubic feet divided by 100
    N b. one pound of CO2 per cubic foot of space
    N c. one pound of CO2 per square foot of deck area
    Y d. the gross volume of the space in cubic feet divided by 30

460: A vessel of not more than 65 feet in length must have a collision bulkhead if it carries more than __________.

    N a. 6 passengers
    N b. 12 passengers
    N c. 36 passengers
    Y d. 49 passengers

542: Before inserting a low-velocity fog applicator into an all-purpose nozzle, you must __________. (D004SA )

    N a. install the high-velocity nozzle tip
    N b. move the handle to position 2
    N c. move the handle to position 1
    Y d. remove the high-velocity nozzle tip

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

636: What is required by regulations concerning the stowage of lifeboats on cargo vessels?

    Y a. Each lifeboat must have a launching appliance.
    N b. Launching appliances must be of the gravity type.
    N c. There may not be more than two launching appliances on the same deck.
    N d. All of the above

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

757: Which tank vessel must carry a signaling lamp?

    N a. A 1,000 GT tanker on a coastwise voyage
    Y b. A 200 GT tanker on an international voyage
    N c. A 300 GT tanker on an intercoastal voyage
    N d. All of the above

786: Which statement is TRUE concerning distress signals in a lifeboat?

    Y a. Hand held flares and orange smoke signals are required.
    N b. If hand-held rocket-propelled parachute flares are provided, they are the only distress signals required.
    N c. Two hand-held smoke signals shall be provided.
    N d. A Very pistol with twelve flares is required.

808: A fire in a pile of canvas is classified as class __________.

    Y a. A
    N b. B
    N c. C
    N d. D

1044: What is the lifesaving signal for "You are seen - Assistance will be given as soon as possible"?

    N a. Green star rocket
    N b. Red star rocket
    Y c. Orange smoke signal
    N d. Horizontal motion of a flag

1192: Which statement is TRUE concerning the oxygen indicator?

    N a. Exposure to flue gas has no effect on the instrument.
    N b. Only one level of the tested space need be sampled by the instrument.
    Y c. Prolonged exposure to CO2 can result in false readings.
    N d. The instrument can detect hydrogen gas.

1216: After launching, an inflatable raft should be kept dry inside by __________.

    N a. opening the automatic drain plugs
    N b. draining the water pockets
    N c. using the electric bilge pump
    Y d. using the bailers and cellulose sponge

1265: The Master of a small passenger vessel must conduct sufficient drills and give sufficient instruction as necessary __________.

    N a. At each crew change
    N b. Every week
    N c. Every month
    Y d. To ensure that all crew members are familiar with their duties during emergencies

1402: When using carbon dioxide to fight a fire on a bulkhead, the CO2 should be applied __________.

    Y a. first to the bottom of the flaming area, sweeping from side to side, and following the flames upward
    N b. in a circular motion from the middle of the bulkhead outward
    N c. to the top of the flaming area, sweeping from side to side, and working toward the bottom
    N d. in an up-and-down motion from one side of the bulkhead to the other

1569: Which list is NOT required to be provided as part of the appendices of the Shipboard Oil Pollution Emergency Plan?

    N a. A list of agencies or officials of Coastal State Administrators responsible for receiving and processing incident reports.
    N b. A list of agencies or officials in regularly visited ports.
    N c. A list specifying who will be responsible for informing the parties listed and the priority in which they must be notified.
    Y d. A list of personnel duty assignments.

1791: Where is the GMDSS Radio Logbook kept aboard ship?

    N a. Attached to the Deck Logbook
    Y b. At the principal radio operating location
    N c. In the Chief Mate's office
    N d. In the Master's office

1887: When amendments are made to the Shipboard Oil Pollution Emergency Plan, the revisions must be submitted to the Coast Guard __________.

    N a. one month before the anniversary date of the plan
    N b. six months before the end of the approval period
    Y c. and cannot be implemented without approval
    N d. and can be implemented without immediate approval as long as final approval is received within six months of submission

2039: You have approximately 14 tons of fish on deck. What will be the shift in the center of gravity after you shift the fish to the fish hold, a vertical distance of 6 feet? (total displacement is 210 tons)

    N a. 0.2 foot
    N b. 0.3 foot
    Y c. 0.4 foot
    N d. 0.5 foot

2184: Your vessel is damaged and is listing to port. The rolling period is short. There is sufficient freeboard so that deck edge submersion is not a problem. What corrective action should be taken FIRST in regard to the vessel's stability?

    N a. Press up any slack double-bottom tanks to eliminate free surface
    N b. Flood any empty double-bottom tanks to add weight low and down
    N c. Jettison topside weights to reduce KG and KB
    Y d. Shift any off-center weights from port to starboard

2307: Why does a centrifugal bilge pump require priming?

    N a. To lubricate shaft seals
    Y b. Lack of ability to lift water level to impellers
    N c. Head pressure must equal discharge pressure
    N d. To overcome resistance of water in the discharge line

2316: The flammable limits for motor gasoline are __________.

    N a. 5.3% to 7% mixture in air
    N b. 0.9% to 5.9% mixture in air
    Y c. 1.4% to 7.6% mixture in air
    N d. 2.5% to 12.8% mixture in air

2370: According to the Chemical Data Guide, the flammable limits of ethylene oxide are __________.

    N a. 1.85 - 48.0%
    Y b. 2 - 100%
    N c. 2.7 - 34%
    N d. 1.9 - 88.0%

2520: According to the Chemical Data Guide, which material is not compatible with vinylidene chloride (inhibited)?

    N a. Aluminum
    N b. Nickel
    Y c. Copper or copper alloys
    N d. Stainless steel

2537: Which statement(s) is(are) TRUE regarding heaving-to?

    N a. A sloop will heave to with her jib and mainsail aback.
    N b. A ketch will heave to with her jib and mizzen aback.
    Y c. A yawl will heave to with her jib aback, main sheet eased, and her mizzen sheeted in.
    N d. All of the above are correct.

2582: When the height of the metacenter is the same as the height of the center of gravity, the metacentric height is equal to __________.

    N a. the height of the metacenter
    N b. the height of the center of gravity
    N c. half the height of the metacenter
    Y d. zero

2728: Your vessel's drafts are: FWD 14'-00", AFT 14'-08"; and the KG is 25.8 feet. Use the selected stability curves in the blue pages of the Stability Data Reference Book to determine the remaining righting arm at 30° inclination if the center of gravity is 1.5 feet off the centerline.

    Y a. 0.6 foot
    N b. 1.3 feet
    N c. 1.9 feet
    N d. 2.9 feet

2834: 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 remaining righting arm at 60° inclination if the center of gravity is 2.4 feet off the centerline.

    N a. 2.4 feet
    N b. 1.8 feet
    Y c. 0.5 foot
    N d. 0.2 foot

2900: You have loaded a deck cargo, and the vessel has assumed a 7° list due to negative GM. Your salt water drafts are: FWD 17'-00", AFT 17'-04". If you then load 825 tons of cargo in the lower holds (VCG 11 feet) and take on 500 tons of bunkers (VCG 2.5 feet), what is the final GM? (Use the reference material in Section 1, the blue pages, of the Stability Data Reference Book)

    N a. 0.8 foot
    N b. 1.0 foot
    Y c. 1.7 feet
    N d. 2.3 feet

2924: 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 22.4 feet and the drafts are: FWD 15'-03", AFT 15'-09".

    Y a. 25°
    N b. 33°
    N c. 48°
    N d. 72°

3033: The effects of free surface on initial stability depend upon the dimensions of the surface of the free liquids and the __________.

    N a. volume of liquid in the tank
    Y b. volume of displacement of the vessel
    N c. location of the tank in the vessel
    N d. height of the center of gravity of the vessel

3060: A vessel's drafts are: FWD 19'-00", AFT 17'-02". How much more cargo can be loaded to have the vessel down to the freeboard draft? (Use the information in Section 1, the blue pages, of the Stability Data Reference Book)

    N a. 5928 tons
    N b. 6016 tons
    Y c. 6149 tons
    N d. 6242 tons

3258: Assuming that the recommended hatch loading sequence is followed, how many long tons of iron ore may be loaded through hatch No. 20 while using a single belt loader to arrive at a desired mean keel draft of 24'-10"? (Use the Guidance Manual for Loading M.V. GRAND HAVEN.)

    N a. 1540 tons
    N b. 1590 tons
    Y c. 1645 tons
    N d. 1670 tons

3696: The equipment required to remove an on-deck oil spill on a barge transferring oil must either be carried on board or __________.

    N a. on a tug standing by
    Y b. available by contract with the shore facility
    N c. kept at the shoreside hose connection during transfer
    N d. kept in a protected shoreside location readily accessible

3925: Among the valves that must be opened on the DEEP DRILLER to pump bilge water out of the port pump room using both bilge pumps is valve __________.

    N a. 26
    N b. 28
    N c. 36
    Y d. 41

3927: What pump may be used to supplement the bilge pump on the DEEP DRILLER?

    N a. #1 Ballast
    N b. #2 Ballast
    N c. Salt-Water Service
    Y d. Drill water

4094: The SS AMERICAN MARINER arrived in port with drafts of: FWD 19'-10.5", AFT 22'-11.6". Cargo was loaded and discharged as shown. Use sheet 2 in the white pages of The Stability Data Reference Book to determine the final drafts. ST-0154

    N a. FWD 20'-01.4", AFT 23'-00.6"
    Y b. FWD 19'-07.6", AFT 22'-10.4"
    N c. FWD 19'-09.3", AFT 22'-08.7"
    N d. FWD 19'-11.7", AFT 23'-02.5"

4095: The DEEP DRILLER is loaded as shown in the Sample Load Form #2 (Ballast to Survival). What is the new longitudinal location of the center of buoyancy if all the bulk materials are discharged?

    N a. 2.34 feet
    N b. 2.48 feet
    N c. 2.50 feet
    Y d. 2.53 feet

4312: The SS AMERICAN MARINER is ready to bunker with drafts of FWD 11'-01", AFT 14'-07". After all bunkers are on board, soundings indicate the tonnages shown. Use the white pages of The Stability Data Reference Book to determine the free surface correction. ST-0158

    Y a. 1.30 feet
    N b. 1.17 foot
    N c. 1.06 foot
    N d. 0.91 foot

4687: What is the decrease in vertical moments for the Coastal Driller if 2.5 feet of drill water is discharged from a full drill water tank #23?

    N a. 3,464 ft-kips
    N b. 2,982 ft-kips
    Y c. 482 ft-kips
    N d. 161 ft-kips

4734: Seawater may be used for drinking __________.

    N a. if gathered during or immediately after a hard rain
    N b. at a maximum rate of two ounces per day
    Y c. under no conditions
    N d. after mixing with an equal quantity of fresh water

4734: Seawater may be used for drinking __________.

    N a. if gathered during or immediately after a hard rain
    N b. at a maximum rate of two ounces per day
    Y c. under no conditions
    N d. after mixing with an equal quantity of fresh water

4797: The COASTAL DRILLER is loaded as shown in the Sample Load Form #1 (Rig Move). What is the new TCG if the entire contents of drill water tanks 6 and 7 are discharged?

    Y a. -0.23 foot
    N b. 0.00 foot
    N c. 0.23 foot
    N d. 0.54 foot

4811: The COASTAL DRILLER is loaded as shown in the Sample Load Form #1 (Rig Move). What is the value of KMT if the entire contents of drill water tanks 6 and 7 are discharged?

    N a. 135.91 feet
    Y b. 136.38 feet
    N c. 136.62 feet
    N d. 136.89 feet

5121: What danger is presented if a waterspout passes over a MODU?

    N a. Heavy rains could cause downflooding.
    N b. Visibility could be restricted by low clouds.
    N c. Large waves could cause structural damage.
    Y d. Personnel may be injured by loose deck gear blown by the wind.

5462: The SS AMERICAN MARINER is ready to bunker with drafts of FWD 13'-10", AFT 16'-04". After all bunkers are on board, soundings indicate the tonnages shown. Use the white pages of The Stability Data Reference Book to determine the free surface correction. ST-0179

    N a. 1.30 feet
    N b. 1.17 foot
    Y c. 1.01 foot
    N d. 0.91 foot

6071: On offshore drilling units fitted with fixed CO2 systems, the system must withstand a bursting pressure of at least __________.

    N a. 5,000 pounds per square inch
    Y b. 6,000 pounds per square inch
    N c. 8,000 pounds per square inch
    N d. 10,000 pounds per square inch

6603: A weathertight door on a MODU must not allow water to penetrate into the unit in __________.

    N a. 50 knot winds
    N b. 70 knot winds
    N c. 100 knot winds
    Y d. any sea condition

7135: What is the best instrument for establishing a safe working area before welding in a confined space?

    N a. An oxygen indicator
    N b. A combustible gas indicator
    Y c. A combination combustible gas and oxygen indicator
    N d. A flame safety lamp

8295: The DEEP DRILLER suffers minor flooding of the port pump room. If both port bilge pumps fail to dewater the pump room, you should use the __________.

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

8371: Each cylinder in a two stroke cycle engine experiences combustion __________.

    Y a. once each crankshaft revolution
    N b. twice each crankshaft revolution
    N c. every other crankshaft revolution
    N d. every fourth stroke

8373: How does combustion air enter the cylinder of a two-cycle diesel engine?

    N a. Cylinder head valves
    Y b. Ports
    N c. Turbo chargers
    N d. Bleeder valves

8443: The requirement to carry an Oil Record Book does not apply to a MODU that __________.

    Y a. is not equipped to discharge overboard any oil or oily mixture
    N b. is on an international voyage to a country that is a party to MARPOL
    N c. has an International Oil Pollution Prevention Certificate
    N d. has an oily water separator of sufficient capacity for the oil wastes generated

8615: The LWT anchor has two angular positions for the flukes. These are __________.

    N a. 30° and 40°
    Y b. 30° and 50°
    N c. 30° and 60°
    N d. 40° and 60°

9155: In plugging submerged holes on a MODU, rags, wedges, and other materials should be used in conjunction with plugs to __________.

    N a. reduce the water pressure on the hull
    Y b. reduce the water leaking around the plugs
    N c. prevent progressive flooding
    N d. reduce the possibility of stress fractures

9704: Which of the following statements is/are TRUE in regard to Ro-Ro vessels' spaces which are "specially suitable for vehicles"?

    N a. The spaces shall be fitted with an approved fire or smoke detecting system.
    N b. The spaces shall be fitted with an approved fixed fire extinguishing system.
    N c. The Commandant may permit the installation of an approved water sprinkler extinguishing system.
    Y d. All of the above