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.


710: Buoyancy is a measure of the ship's __________.


1029: Which vessel(s) is(are) required to comply with the vessel bridge-to-bridge radiotelephone regulations while navigating?


1100: The maximum speed of lowering for a lifeboat on gravity davits is controlled by the __________.


1108: The vapor pressure of a substance __________.

    Y a. increases with the temperature
    N b. decreases as temperature increases
    N c. is not affected by temperature
    N d. may increase or decrease as the temperature rises

1169: Your vessel's draft is 24'-06" forward and aft. The MT1 of your vessel is 1000 ft-tons. How many tons of cargo must be loaded in number 4 hold, which is 100 feet abaft the tipping center, if she is to have a 2 foot drag?

    N a. 120 tons
    Y b. 240 tons
    N c. 300 tons
    N d. 480 tons

1352: If you have a fire in the engine room, your FIRST act should be to __________.

    N a. discharge the fixed CO2 system into the engine room
    Y b. secure the fuel supply and ventilation to the engine room
    N c. maneuver your vessel into the wind
    N d. have all of your crew get into the liferaft

1360: When lowering a boat with gravity davits, it will be pulled into the embarkation deck by the __________.

    N a. falls
    Y b. tricing pendants
    N c. frapping lines
    N d. boat hooks

1459: Which data is NOT painted on the bow of a lifeboat?

    N a. Number of persons allowed
    N b. Name of the vessel
    Y c. Weight of the boat
    N d. Port of registry

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

1514: "Thermal protective aids" are required for what percentage of the persons a survival craft is equipped to carry?

    Y a. 10%
    N b. 50%
    N c. 75%
    N d. 100%

1626: A shipmate suffers a heart attack and stops breathing. You must __________.

    N a. administer oxygen
    Y b. immediately check his pulse and start CPR
    N c. make the victim comfortable in a bunk
    N d. immediately give a stimulant, by force if necessary

1782: Which channel has been designated for on-scene communications in GMDSS?

    N a. 24
    N b. 2182
    N c. 70
    Y d. 16 and 2174.5

2008: Your vessel measures 119 feet long by 17 feet in beam. If the natural rolling period at a draft of 5'-05" is 6 seconds, what is the GM?

    N a. 1.14 feet
    N b. 1.36 feet
    Y c. 1.55 feet
    N d. 1.96 feet

2016: Your vessel measures 125 feet long by 17 feet in beam. If the natural rolling period at a draft of 7'-09" is 6 seconds, what is the GM?

    N a. 0.95 foot
    N b. 1.25 feet
    Y c. 1.55 feet
    N d. 1.78 feet

2079: Your vessel displaces 479 tons. The existing deck cargo has a center of gravity of 3.0 feet above the deck and weighs 16 tons. If you load 23 tons of anchor and anchor chain with an estimated center of gravity of 9 inches above the deck, what is the final height of the CG above the deck?

    N a. 0.33 foot
    N b. 1.00 foot
    N c. 1.45 feet
    Y d. 1.67 feet

2156: The flammable limits of gasoline are 1.3 to 7.6 percent volume of the air. You are testing a tank that contained gasoline by using a combustible gas indicator. Under testing, the tank sample registered 55 on the instrument's dial. What is the concentration of flammable gases?

    Y a. 0.7%
    N b. 4.1%
    N c. 5.5%
    N d. 55%

2178: Your drafts are: FWD 6'-01", AFT 6'-05". From past experience, you know that the vessel will increase her draft by 1 inch for every 7 tons loaded. There is rig water on board and 20 tons of deck cargo. How many more tons of cargo can be loaded while maintaining the same trim? (D037DG )

    N a. none
    N b. 10.5 tons
    Y c. 14.0 tons
    N d. 17.5 tons

2238: Which system has the least effective radius of operation?

    N a. HF SITOR
    N b. MF NBDP
    Y c. VHF DSC
    N d. NAVTEX

2380: Access to a cargo pumproom on a tank vessel carrying grades A, B, C or D liquid cargoes shall be __________.

    N a. at least 13.1 feet away from the galleys, living quarters or navigation spaces
    Y b. from the open deck
    N c. only from areas equipped with power ventilation systems
    N d. isolated from any part of the vessel which normally contains sources of vapor ignition

2431: A device used to enlarge the size of an existing bore hole, having teeth arranged on its outside circumference to cut the formation as it rotates is a(n) __________.

    N a. enlarger bit
    N b. casing bit
    Y c. hole opener
    N d. casing opener

2532: The appearance of Bunker C and fuel oils are dark colored liquids, and __________ .

    N a. soluble oils
    N b. slop oils
    N c. cutting oils
    Y d. viscous oils

2710: Remote controls for quick-closing shut off valves are required in how many location(s)?

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

2731: The document that certifies the correctness of the load line marks on a MODU is called the __________.

    N a. Certificate of Inspection
    Y b. Load line certificate
    N c. Certificate of Documentation
    N d. SOLAS Certificate

2846: A small passenger vessel engaging in international voyages must be dry docked at least once every __________.

    N a. 6 months
    Y b. 12 months
    N c. 36 months
    N d. 60 months

2847: The required portable radio shall be stored in the proper location and be __________.

    N a. equipped with an approved carrying case
    N b. equipped with spare batteries
    Y c. readily accessible for transfer to a lifeboat
    N d. in a waterproof enclosure

2931: If the metacentric height is large, a floating MODU will __________.

    N a. be tender
    N b. have a slow and easy motion
    Y c. be stiff
    N d. have a tendency to yaw

2967: When a wind force causes a floating MODU to heel to a static angle, the __________.

    N a. centers of buoyancy and gravity are in the same vertical line
    Y b. righting moment equals the wind-heeling moment
    N c. downflooding point is below water
    N d. deck-edge immersion occurs

3098: Assuming that the recommended hatch loading sequence is followed, how many long tons of iron ore may be loaded through hatches 8 & 12 while using a single belt loader to arrive at a desired mean keel draft of 28'-03"? (use the Guidance Manual for Loading M.V. GRAND HAVEN).

    N a. 460 tons per hatch
    N b. 520 tons per hatch
    Y c. 690 tons per hatch
    N d. 730 tons per hatch

3115: For a MODU with transverse inclination, an increase in GMT causes __________.

    N a. list to stabilize at an angle of loll
    Y b. list to decrease
    N c. trim to decrease
    N d. list to increase

3138: 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 29'-06"? (Use the Guidance Manual for Loading M.V. GRAND HAVEN.)

    N a. 1550 tons
    Y b. 2920 tons
    N c. 3010 tons
    N d. 3515 tons

3367: After a liferaft is launched, the operating cord __________.

    Y a. serves as a sea painter
    N b. detaches automatically
    N c. is used to rig the boarding ladder
    N d. is cut immediately as it is of no further use

3379: Where should a tank barge's Certificate of Inspection be kept?

    N a. In the owner's office
    N b. In the operator's office
    Y c. On the barge
    N d. On the towboat

3509: The maximum draft of the SS AMERICAN MARINER cannot exceed 30'-01" in order to cross a bar. The present drafts are: FWD 29'-04", AFT 30'-06". Use the white pages of the Stability Data Reference Book to determine the minimum amount of sea water to ballast the forepeak to achieve this condition.

    N a. 97 tons
    Y b. 100 tons
    N c. 103 tons
    N d. 106 tons

3524: Each fireman's outfit and its spare equipment on a tankship must be stowed in a(n) __________.

    N a. locked cabinet in the machinery space
    N b. unlocked cabinet in the machinery space
    Y c. separate and accessible location
    N d. location near a fire hydrant

3587: A person has fallen overboard and is being picked up with a rescue boat. If the person appears in danger of drowning, the rescue boat should be maneuvered to make____________________.

    N a. an approach from leeward
    N b. an approach from windward
    N c. an approach across the wind
    Y d. the most direct approach

3698: You are attempting to administer CPR to a victim. When you blow into his mouth it is apparent that no air is getting into the lungs. What should you do?

    N a. Blow harder to force the air past the tongue.
    N b. Raise the victim's head higher than his feet.
    N c. Press on the victim's lungs so that air pressure will blow out any obstruction.
    Y d. Re-tip the head and try again.

4003: The DEEP DRILLER is loaded as shown in Sample Load Form #4 (Drilling). What would be the new sum of transverse moments for Fuel Oil if the entire contents of Tank 4P are transferred to Tank 4S?

    N a. 995 foot-tons
    N b. 16,918 foot-tons
    N c. 17,713 foot-tons
    Y d. 34,381 foot-tons

4009: You are preparing to load fuel oil on a vessel of 1,600 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 barrel
    N d. are opened and the flame screen replaced

4085: The DEEP DRILLER is loaded as shown in the Sample Load Form #1 (Transit). What is the new height of the center of gravity corrected for transverse free surface effects if the entire contents of Salt Water Ballast Tanks 1P and 1S are discharged?

    N a. 65.95 feet
    N b. 66.85 feet
    N c. 67.66 feet
    Y d. 68.59 feet

4228: You are loading in a port subject to the tropical load line mark and bound for a port subject to the winter load line mark. You will enter the summer zone after steaming one day, and you will enter the winter zone after a total of eight days. You will consume 36 tons of fuel, water, and stores per day. The hydrometer reading at the loading pier is 1.002, and the TPI is 47. What is the minimum freeboard required at the start of the voyage? (Get Table Data)

    N a. 71.0 inches
    Y b. 72.7 inches
    N c. 79.5 inches
    N d. 81.0 inches

4371: Where the seabed consists of sand or silt, the most severe potential problem for an independent-leg jack-up can result from __________.

    Y a. scour
    N b. penetration
    N c. marine growth
    N d. insufficient preload

4605: How many independent bilge systems is the COASTAL DRILLER equipped with?

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

5153: A semisubmersible floating in sea water displaces 20,000 long tons. She has vertical moments of 1,000,000 foot-long tons. What is the change in KG if 500 long tons are placed aboard at a KG of 120 feet?

    N a. 1.22 feet upward
    Y b. 1.71 feet upward
    N c. 1.75 feet upward
    N d. 2.93 feet upward

5312: As shown, the line indicated by number 4 is connected to the __________. (D016SA )

    N a. releasing gear
    N b. sea painter
    Y c. McCluny hook
    N d. Fleming gear

5415: The COASTAL DRILLER, loaded as shown in the Sample Load Form #2 (Preload), dumps the preload. However, 138.4 kips remained on board. The LM for the remaining preload is 17,992 ft-kips. What is the new LCG?

    N a. 119.33 feet AFO
    N b. 119.44 feet AFO
    Y c. 119.54 feet AFO
    N d. 119.66 feet AFO

6065: A fire pump on a MODU requires 175 psi discharge pressure to maintain the required 50 psi pitot tube pressure at the two highest hydrants. The maximum setting for the relief valve is __________.

    N a. 125 psi
    N b. 175 psi
    Y c. 200 psi
    N d. 225 psi

6124: On a vessel of 7000 tons displacement, a tank 35 ft. long, 30 ft. wide and 4 ft. deep is half filled with fuel oil (S.G. 0.962) while the vessel is floating in saltwater (S.G. 1.026). What is the free surface constant for this tank?

    Y a. 2,109
    N b. 25,974
    N c. 31,328
    N d. 909,090

6623: Each hose in the fuel transfer system for helicopter refueling must have a __________.

    Y a. static grounding device
    N b. quick-disconnect nozzle
    N c. splash guard
    N d. vapor recovery system

6684: The SS AMERICAN MARINER has drafts of: FWD 19'-04", AFT 21'-02". Use the white pages of the Stability Data Reference Book to determine the drafts if you ballast the forepeak with 68 tons of seawater.

    N a. FWD 19'-09.7", AFT 20'-10.0"
    Y b. FWD 19'-11.1", AFT 20'-09.4"
    N c. FWD 19'-11.7", AFT 20'-08.8"
    N d. FWD 20'-00.3", AFT 20'-08.2"

7093: Normal mouth temperature is __________.

    N a. 96.4F
    N b. 97.5F
    Y c. 98.6F
    N d. 99.7F

7631: At an angle of loll, the capsizing moment is __________.

    N a. maximum
    N b. negative
    N c. positive
    Y d. zero

8261: When taking soundings on a MODU, coating the tape with chalk helps to __________.

    Y a. better identify the correct reading
    N b. show the depth of any water in an oil tank
    N c. make the tape roll easier
    N d. reduce possibility of sparks

8721: The DEEP DRILLER, at 60.0 feet draft in sea water, has VM = 974,441 foot-long tons, LM = 3 foot-long tons, FSML = 30,572 foot-long tons, and FSMT = 18,732 foot-long tons. What is the transverse free surface correction to KG?

    N a. 0.00 feet
    Y b. 1.03 feet
    N c. 1.69 feet
    N d. 2.22 feet

8835: A jack-up with a calculated moment to change list one inch (MCL1") of 1,350 foot-kips intends to transfer drill water from a tank with a TCG of 82 feet to a tank with a TCG of 18 feet. How much weight should be transferred to change the draft on the port side from 11.0 to 11.5 feet?

    N a. 67.5 kips
    N b. 81.0 kips
    N c. 126.6 kips
    Y d. 253.1 kips

8848: Enclosed lifeboats which have been afloat over a long period of time require __________.

    N a. frequent opening of hatches to permit entry of fresh air
    Y b. regular checks of bilge levels
    N c. use of ear plugs to dampen engine noise
    N d. frequent flushing of the water spray system with fresh water

8873: The DEEP DRILLER is loaded as shown in the Sample Load Form #1 (Transit). Weather conditions make it necessary to ballast down to survival draft. It is decided to check the stability at the intermediate draft of 32 feet. If the added ballast has an average VCG of 9.03 feet, and the sum of free surface moments is 56,244 foot-tons, what is the new KGL?

    N a. 54.76 feet
    N b. 55.76 feet
    N c. 57.22 feet
    Y d. 61.16 feet

8991: The enclosed area defined as the intersection of the surface of the water and the hull of a vessel is the __________.

    N a. amidships plane
    N b. longitudinal reference plane
    N c. baseline
    Y d. waterplane

9197: In the first 24 hours after abandoning a vessel, water should be given only to personnel who are __________.

    N a. thirsty
    Y b. sick or injured
    N c. wet
    N d. awake

9267: Lifeboat winches on a MODU are required to be inspected and an entry made in the logbook. What should this entry include?

    N a. The time required to lower a lifeboat
    N b. The time required to raise a lifeboat
    Y c. The date of inspection and condition of the winch
    N d. All of the above

9323: A fuel-air mixture below the lower explosive limit is too __________.

    N a. rich to burn
    Y b. lean to burn
    N c. cool to burn
    N d. dense to burn