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.


1: Your vessel is on an even keel. 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?


238: Unless there is danger of further injury, a person with a compound fracture should not be moved until bleeding is controlled and __________.


252: What, when removed, will result in the extinguishment of a fire?


323: You must make a written application to obtain or renew your "T" boat's Certificate of Inspection __________.

    N a. on form CG-835
    N b. at the shipyard where you are hauled out
    Y c. on form CG-3752
    N d. every time your boat is hauled out

539: 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 tank tops. The hold is 50 feet long and 50 feet wide. The reduction in metacentric height is __________.

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

578: When fighting fires in spaces containing bottles of LPG (liquefied petroleum gas), you should __________.

    N a. attempt to isolate the fire from the LPG
    Y b. cool the bottles or remove them from the fire area
    N c. see that the valves on all LPG bottles are closed
    N d. place insulating material over the bottles

815: Applications for waivers of any requirements of the regulations for oil transfer operations must be submitted __________.

    N a. the day before the operations
    N b. 5 days before the operations
    N c. 10 days before the operations
    Y d. 30 days before the operations

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

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

1009: The SS AMERICAN MARINER has the following drafts: FWD 09'-00", AFT 15'-11.5". Upon completion of loading and bunkering the items listed will be on board. Use the white pages of The Stability Data Reference Book to determine the minimum GM required to meet a one compartment standard. ST-0021

    N a. 1.80 feet
    N b. 1.89 feet
    Y c. 1.98 feet
    N d. 2.05 feet

1129: Which function is NOT provided by the scrubber of an inert gas system?

    N a. Cools the inert gas.
    N b. Removes particulate matter like soot.
    Y c. Maintains gas pressure in the tanks.
    N d. Removes chemical impurities from the gas.

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

1204: Generally, when lifting an inflatable liferaft back aboard ship you would use the __________.

    Y a. towing bridle
    N b. main weather cover
    N c. external lifelines
    N d. righting strap

1205: On board small passenger vessels, storage batteries containing an electrolyte must be set in trays constructed of __________.

    N a. a fireproof material
    Y b. a material resistant to damage by the electrolyte
    N c. a porous material that permits drainage of any acid overflow
    N d. suitably strong to hold the weight of the batteries

1276: The lights on the outside of the canopy on an inflatable liferaft operate __________.

    N a. by turning the globe clockwise
    N b. by a switch at each light
    N c. by a light sensor
    Y d. automatically when the raft is inflated

1295: If you must land on a beach with an oar-propelled lifeboat through a heavy surf, the recommended method is to __________.

    N a. keep the bow directly in toward the beach, and tow the sea anchor off the stern
    N b. ride in on the back of a large breaker
    Y c. keep the bow into the seas with the sea anchor out over the bow, and row to meet the breaking waves
    N d. head directly into the beach by staying between the crests of the waves

1342: If there's a fire aboard your vessel, you should FIRST __________.

    N a. notify the Coast Guard
    Y b. sound the alarm
    N c. have passengers put on life preservers
    N d. cut off air supply to the fire

1385: An inflatable liferaft is hand-launched by __________.

    N a. pulling a cord
    N b. cutting the wire restraining bands
    N c. removing the rubber packing strip
    Y d. throwing the entire container overboard

1496: Your vessel has been holed in #1 hold and partially flooded. The hole is plugged against further flooding. In calculating the effect of the flooding on your transverse stability, you should use which method?

    N a. Compartment standard method
    N b. Lost buoyancy method
    N c. Factor of subdivision method
    Y d. Added weight method

1554: The SS NORTHLAND is loaded to drafts: FWD 32'-04", AFT 34'-02". The KG is 31.5 feet. Use the salmon pages of the Stability Data Reference Book to determine the angle of list if #6 starboard tank is fully loaded with 1624 tons of salt water ballast (VCG is 36.5 feet off the centerline).

    N a. 3.4°
    N b. 4.7°
    Y c. 6.4°
    N d. 7.9°

1660: If the meter needle of the oxygen indicator cannot be set to zero, what should be done?

    Y a. Replace the batteries.
    N b. Check the sampling tube for blockage.
    N c. Adjust the final reading by the amount the needle is displaced from zero.
    N d. Replace the platinum filament.

1676: Before you start an engine in a compartment, it's MOST important to __________.

    N a. check the flame arrester
    N b. check the fuel tank
    N c. check the battery
    Y d. ventilate the bilges

1792: For GMDSS, which statement concerning a compulsory vessel is FALSE?

    N a. A conditional or partial exemption may be granted, in exceptional circumstances, for a single voyage outside the sea area for which the vessel is equipped.
    Y b. Once a compulsory vessel's GMDSS station has been fitted and inspected, the station must be inspected only once every five years.
    N c. All passenger vessels regardless of size and all cargo vessels that are 300 Gross Tons or larger must comply.
    N d. Compulsory vessels must carry at least two licensed GMDSS Radio Operators for Distress and Safety radio-communications purpose..

2464: The SS AMERICAN MARINER has the liquid loading shown. Use the white pages of The Stability Data Reference Book to determine the KG of the liquid load. ST-0064

    N a. 3.9 feet
    Y b. 4.3 feet
    N c. 4.7 feet
    N d. 5.1 feet

2572: The radiotelephone urgency signal is __________.

    N a. mayday
    Y b. pan pan
    N c. securite
    N d. seelonce feenee

2664: Gasoline fumes tend to __________.

    Y a. settle near the bottom of the bilge
    N b. settle near the top of the bilge
    N c. settle evenly throughout all levels of the bilge by mixing with air
    N d. disperse to atmosphere

2777: The lubber's line on a magnetic compass indicates __________.

    N a. compass north
    Y b. the direction of the vessel's head
    N c. magnetic north
    N d. a relative bearing taken with azimuth circle

2840: If a vessel loads 400 tons of deck cargo resulting in a GM of -0.2 feet on 9000 tons of displacement, what will be the angle of loll? (Use the information in Section 1, the blue pages, of the Stability Data Reference Book)

    N a. 16°
    N b. 15°
    N c. 12°
    Y d. 9°

3077: The purpose of the inclining experiment on a MODU is to determine the __________.

    Y a. lightweight and lightweight center of gravity location
    N b. position of the center of buoyancy
    N c. position of the metacenter
    N d. maximum load line

3093: You are preparing to load fuel oil on a vessel of 150 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 5 gallons
    N d. are opened and the flame screen replaced

3127: Automatic fire dampers in ventilation systems are operated by use of a __________.

    Y a. fusible link
    N b. remote operated valve
    N c. C02 system pressure switch
    N d. heat or smoke detector

3142: In the machinery space of all uninspected motor vessels, there must be one type B-II hand portable fire extinguisher for every __________. (Uninspected Vessel Regulations)

    N a. 500 S.H.P. of the main engines or fraction thereof
    N b. 1000 S.H.P. of the main engines or fraction thereof
    N c. 500 B.H.P. of the main engines or fraction thereof
    Y d. 1000 B.H.P. of the main engines or fraction thereof

3307: You are signaling by flag hoist using the International Code of Signals. You wish to send the signals CL and IW and have them read in that order. What would ensure this?

    N a. Hoist CL from the starboard yard and IW from the port yard.
    N b. Hoist CLIW together.
    Y c. Hoist CL tackline IW
    N d. Any of the above will ensure the correct reading.

3447: A semisubmersible, 200 feet in length between draft marks with the LCF 10 feet aft of amidships, records the following drafts: Port Forward 64'-09"; Port Aft 68'-09"; Starboard Forward 59'-09"; and Starboard Aft 63'-09". What is the list?

    N a. 10 feet to port
    Y b. 5 feet to port
    N c. 2.5 feet to port
    N d. 5 feet to starboard

3462: A rigid lifesaving device only designed for survivors to hold on to while in the water is known as a __________.

    N a. liferaft
    N b. life float
    N c. life preserver
    Y d. buoyant apparatus

3518: The groups "AA" and "AB" are used in conjunction with what other group in signaling by flashing light?

    N a. WA
    N b. RQ
    N c. CS
    Y d. RPT

3551: Which toxic gas is a product of incomplete combustion, and is often present when a fire burns in a closed compartment?

    Y a. Carbon monoxide
    N b. Carbon dioxide
    N c. Hydrogen sulfide
    N d. Nitric oxide

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.

3728: A crew member has suffered frostbite to the toes of the right foot. Which is NOT an acceptable first aid measure?

    Y a. Rub the toes briskly.
    N b. Elevate the foot slightly.
    N c. Rewarm rapidly.
    N d. Give aspirin or other medication for pain if necessary.

3735: Which procedure should be followed when individuals are rescued in cold climates and suffer from hypothermia?

    N a. Give them brandy or other alcoholic stimulation to promote a return to normal body temperature.
    Y b. Move them to a warm room to gradually raise their body temperature.
    N c. Keep them moving to stimulate circulation to raise their body temperature.
    N d. Immerse them in a hot bath to rapidly raise their body temperature.

4054: Which navigational equipment is required to be tested and logged before a towing vessel embarks on a voyage of more than 24 hours?

    N a. Compass and/or swing meter
    N b. Radar(s) and VHF radio(s)
    N c. LORAN-C and/or GPS receiver(s)
    Y d. All required navigational equipment, without exception

4059: What must the owner or Master do if any of the towing vessel's required navigational safety equipment fails during a voyage?

    N a. Repair it at the earliest practicable time
    N b. Enter its failure in the log or other on board record
    N c. Consider the state of the equipment in deciding whether it is safe for the vessel to proceed
    Y d. All of the above

4160: 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 30° inclination.

    N a. 0.9 feet
    Y b. 2.1 feet
    N c. 4.0 feet
    N d. 5.9 feet

4225: The maximum transverse extension of the cantilever for the COASTAL DRILLER places the rotary __________.

    Y a. within 10 feet of the centerline
    N b. at the vessel TCG
    N c. at the leg centroid
    N d. 40 feet aft of the transom

4293: Preloading tests the soil to the vertical leg reaction that would be imposed by __________.

    N a. static forced and drilling loads
    N b. a severe storm
    Y c. the design storm
    N d. environmental forces

4345: What information must be available to use the Allowable Wind and Wave Charts for the COASTAL DRILLER?

    N a. Soil conditions
    N b. Overturning moment
    Y c. Water depth
    N d. Specific gravity of the sea water

4447: When a helicopter is lifting personnel from a survival craft, the other individuals in the craft should __________.

    N a. enter the water in case the person being lifted slips from the sling
    N b. stand on the outside of the craft to assist the person being lifted
    N c. remove their life preservers to prepare for their transfer to the helicopter
    Y d. remain seated inside the craft to provide body weight for stability

4793: The COASTAL DRILLER is loaded as shown in the Sample Load Form #1 (Rig Move). What is the margin on the maximum allowable KG if winds increase to greater than 70 knots, and the TOC is changed to the recommended value?

    N a. 0.0 foot
    Y b. 1.0 foot
    N c. 37.0 feet
    N d. 38.0 feet

5276: The SS AMERICAN MARINER has drafts of: FWD 18'-07", AFT 23'-03". Use the white pages of the Stability Data Reference Book to determine the drafts if you ballast the forepeak with 92 tons of seawater.

    Y a. FWD 19'-04.9", AFT 22'-08.7"
    N b. FWD 19'-05.4", AFT 22'-08.0"
    N c. FWD 19'-05.7", AFT 22'-07.7"
    N d. FWD 19'-06.3", AFT 22'-07.1"

5287: The DEEP DRILLER, loaded as shown in Sample Load Form #1 (Transit), suffers minor damage which results in flooding in tank 1S. You may pump from __________.

    N a. 2S
    N b. C1S
    Y c. 1S
    N d. 10P

5603: The full period of motion of the DEEP DRILLER while in transit is 7 seconds and the maximum pitch angle as seen on the inclinometers is 4 degrees. From the standpoint of critical motion, the motion is __________.

    N a. unsatisfactory, change course and speed
    Y b. satisfactory, continue transit
    N c. unsatisfactory, ballast to survival draft
    N d. unsatisfactory, place unit in standby

6084: Your drafts are: FWD 20'-08", AFT 23'-03". Use the blue pages of the Stability Data Reference Book to determine the MT1.

    Y a. 1050 foot-tons
    N b. 1065 foot-tons
    N c. 1090 foot-tons
    N d. 1130 foot-tons

7055: Seasickness is caused by rolling or rocking motions which affect fluids in the __________.

    N a. stomach
    N b. lower intestines
    Y c. inner ear
    N d. bladder

7393: When a davit-launched raft is lowered from a MODU, upon becoming waterborne, the raft is released by __________.

    N a. activating the release lock of the hook
    N b. pulling smartly on the knobbed cocking lanyard
    Y c. the effects of buoyancy removing the weight of the raft from the hook
    N d. releasing the boarding flap and the bowsing lines

8317: The minimum concentration of H2S which can cause death if a person is exposed for even an instant is __________.

    N a. 200 ppm
    N b. 400 ppm
    N c. 600 ppm
    Y d. 1000 ppm

8445: Under the regulations implementing MARPOL, a mobile offshore drilling unit is required to have an International Oil Pollution Prevention (IOPP) Certificate when the unit __________.

    N a. is drilling on the Outer Continental Shelf
    N b. moves to a new drilling location in U.S. waters
    Y c. engages in a voyage to a port of another country which is a party of MARPOL
    N d. All of the above

8485: The DEEP DRILLER, at a draft of 60 feet, has a KGL of 55.4 feet and an LCG of 2.43 feet. What is the trim angle?

    Y a. 2° by the head
    N b. 2° by the stern
    N c. 4° by the head
    N d. 4° by the stern

8712: Jettisoning weight from topside __________.

    N a. returns the vessel to an even keel
    N b. reduces free surface effect
    Y c. lowers the center of gravity
    N d. raises the center of buoyancy

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

9415: A solution to overcome tripping defects is an arrangement of special plates on either side of the flukes, designed to set them in the correct tripping position. These special plates are called __________.

    N a. trippers
    N b. stocks
    N c. stabilizers
    Y d. palms

9457: The center of buoyancy is located at the __________.

    N a. geometric center of the waterplane area
    N b. intersection of the vertical centerline and line of action of the buoyant force
    N c. center of gravity of the vessel corrected for free surface effects
    Y d. geometric center of the displaced volume