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.


7: You have been carrying a liquid with flammable limits of 1% to 7% mixture with air. If your instructions say that no one shall enter the tank if the vapor concentration is over 15% of the LEL, what is the maximum allowable percentage of vapors for men to enter?


45: Which statement is TRUE concerning small oil spills?


218: A compound fracture is a fracture in which __________.


401: On a vessel of 12,000 tons displacement, what is the reduction in metacentric height due to free surface when a tank 60 feet long and 60 feet wide is partially filled with water?

    N a. 2.30 feet
    N b. 2.43 feet
    N c. 2.48 feet
    Y d. 2.57 feet

437: On small passenger vessels bunks installed in overnight passenger accommodation spaces __________.

    N a. must be no less than 74" long and 24" wide with 24" of clear space above
    N b. must not be located more than 3 high, fitted with a suitable aid to access bunks more than 5' above deck with suitable aids to access bunks more than 5' above deck
    N c. must be immediately adjacent to an aisle leading to a means of escape
    Y d. All of the above

437: On small passenger vessels bunks installed in overnight passenger accommodation spaces __________.

    N a. must be no less than 74" long and 24" wide with 24" of clear space above
    N b. must not be located more than 3 high, fitted with a suitable aid to access bunks more than 5' above deck with suitable aids to access bunks more than 5' above deck
    N c. must be immediately adjacent to an aisle leading to a means of escape
    Y d. All of the above

439: Fixed CO2 systems would not be used on crew's quarters or __________.

    N a. the paint locker
    Y b. spaces open to the atmosphere
    N c. cargo holds
    N d. the engine room

743: In order for the automatic lifeboat drain to operate properly __________.

    N a. the cap should be removed to drain the boat when it is waterborne
    Y b. the cage must be free of rubbish or the ball may not seat properly
    N c. there is an automatic ball check located in a siphon tube
    N d. the small lever to release the rubber ball float must be turned counterclockwise

858: A fire in trash and paper waste is classified as class __________.

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

970: During cargo operations, your vessel develops a list due to the center of gravity rising above the transverse metacenter. To correct the list, you should __________.

    N a. shift weight to the high side
    N b. shift weight to the centerline
    Y c. add weight in the lower holds or double bottoms
    N d. remove weight from the lower holds or double bottoms

1197: A squeeze-grip type carbon-dioxide portable fire- extinguisher has been partially discharged. It should be __________.

    N a. replaced in its proper location if weight loss is no more than 15%
    N b. replaced in its proper location if weight loss is no more than 25%
    N c. replaced in its proper location regardless of weight
    Y d. labeled empty and recharged as soon as possible

1206: Inflatable liferafts are provided with a __________.

    N a. knife
    N b. towing connection
    N c. lifeline
    Y d. All of the above

1257: Providing you are not sailing in the Red Sea or another special area as listed in ANNEX V of MARPOL, how many miles from land must you be to throw garbage including bottles, rags, and glass that has not been ground up into the sea?

    N a. 3 nm
    N b. 6 nm
    Y c. 12 nm
    N d. 25 nm

1281: You are in the process of righting an inflatable liferaft that has inflated in an upside down position. Which statement is TRUE?

    N a. As the raft flips to the upright position, you will be thrown clear.
    N b. After the raft is in the upright position on top of you, dive down to prevent your life preservers from fouling as you come out.
    Y c. Swim out from under the raft in a face up position to keep your life preservers clear of the raft.
    N d. You should remove your life preservers before attempting to right an inflatable raft.

1366: The air spaces in the floor of an inflatable liferaft will provide protection against __________.

    N a. asphyxiation from CO2
    N b. loss of air in the sides of the raft
    N c. rough seas
    Y d. cold water temperatures

1368: A fire in electrical equipment should be extinguished by using __________.

    N a. salt water
    N b. foam
    N c. low-velocity fog
    Y d. CO2

1405: When launching an inflatable liferaft, you should make sure that the operating cord is __________.

    Y a. fastened to some substantial part of the vessel
    N b. not fastened to anything
    N c. secured to the hydrostatic release
    N d. fastened to the raft container

1564: Which action is routinely performed at the annual servicing and inspection of a dry-chemical cartridge-operated portable fire extinguisher?

    Y a. Insure the chemical is powdery.
    N b. Replace the cartridge.
    N c. Pressure test the discharge hose.
    N d. Test the pressure gauge for proper operation.

1712: The gross weight of a fully charged CO2 cylinder is 80 lbs. When the bottle is empty it weighs 60 lbs. What is the minimum acceptable gross weight of the CO2 bottle before it should be recharged by the manufacturer?

    N a. 55 lbs
    N b. 68 lbs
    Y c. 78 lbs
    N d. 82 lbs

2087: The davit aboard a MODU is used to __________.

    N a. lower personnel down by a transfer basket
    N b. lower food and water to personnel in a liferaft
    Y c. lower the liferaft down with its full complement
    N d. move equipment around the deck

2091: To inflate a davit launched liferaft you __________.

    N a. initially connect the compressed air nozzle to the inflation tube
    Y b. pull the inflation lanyard
    N c. connect the hand pump to the inflation tube and pump it up
    N d. connect the helium nozzle to the inflation tube

2098: The SS AMERICAN MARINER is loaded with the cargo shown. Use the white pages of The Stability Data Reference Book to determine the amount of liquid loading required in the double bottom tanks to meet a one compartment standard. ST-0049

    Y a. 395 tons
    N b. 530 tons
    N c. 750 tons
    N d. 990 tons

2147: Each life preserver must be readily accessible to the person for whom it is intended while he or she is __________.

    N a. at work, only
    N b. in his or her berthing area, only
    Y c. BOTH at work and in his or her berthing area
    N d. None of the above

2152: You have 6 containers of ship stores each measuring 8'L by 4'B by 6'H and weighing 0.5 ton each. Each container is stowed on deck. What is the maximum VCG permitted of the remaining cargo if you are carrying rig water and load to maximum capacity? (See illustration D037DG, stability letter for M.V. Surveyor) (D037DG )

    N a. 1.06 feet
    N b. 1.32 feet
    N c. 1.65 feet
    Y d. 1.90 feet

2152: You have 6 containers of ship stores each measuring 8'L by 4'B by 6'H and weighing 0.5 ton each. Each container is stowed on deck. What is the maximum VCG permitted of the remaining cargo if you are carrying rig water and load to maximum capacity? (See illustration D037DG, stability letter for M.V. Surveyor) (D037DG )

    N a. 1.06 feet
    N b. 1.32 feet
    N c. 1.65 feet
    Y d. 1.90 feet

2269: To what chemical family does ethylene oxide belong?

    N a. Glycol ethers
    Y b. Alkylene oxides
    N c. Esters
    N d. Alcohols

2564: 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 holds 1 and 2 flood, the vessel will sink if the permeability exceeds what percent?

    N a. 19
    N b. 24
    Y c. 32
    N d. 39

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

2916: What is the minimum number of B-II hand portable fire extinguishers required on board a 105 GT towboat with a 7500 B.H.P. plant (including the machinery space)? (Uninspected Vessel Regulations)

    N a. 6
    N b. 8
    Y c. 9
    N d. 11

2989: When would it NOT be necessary to immediately notify the U.S. Coast Guard? (small passenger vessel regulations)

    N a. Loss of life
    N b. Major damage affecting the seaworthiness of a vessel
    Y c. Damage amounting to $2,000
    N d. Injury to a person which requires medical treatment beyond first aid

3028: While serving as Master on board your vessel, your license must be __________. (small passenger vessel regulations)

    N a. displayed in the company office on shore
    N b. displayed in your home
    Y c. in your possession on board the vessel
    N d. kept in the Coast Guard office where you sat for your license

3070: Your vessel's drafts are: FWD 14'-04", AFT 12'-08". 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. 6500 tons
    N b. 7001 tons
    N c. 7415 tons
    Y d. 8699 tons

3141: 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-0108

    N a. Available GM 4.81 ft
    N b. Available GM 4.69 ft
    N c. Available GM 4.60 ft
    Y d. Available GM 4.28 ft

3161: The wooden plug fitted tightly in the vent of a damaged tank may prevent the tank from __________.

    Y a. filling completely
    N b. developing free surfaces
    N c. developing free surface moments
    N d. collapsing

3170: What would be an example of a B-I extinguisher? (small passenger vessel regulations)

    N a. 2.5 gallon foam
    N b. 10 pound carbon dioxide
    Y c. 2 pound dry chemical
    N d. 5 pound foam

3173: What is considered to be a B-II portable fire extinguisher?

    N a. 2 pound dry chemical
    Y b. 2-1/2 gallon foam
    N c. 4 pound carbon dioxide
    N d. All of the above

3212: Before starting a gasoline engine on a motorboat, you should make sure for safety that __________.

    N a. the gasoline tank is full
    Y b. the bilges, cabins, etc. are thoroughly ventilated
    N c. you have fresh water on board
    N d. Each of the above is followed

3323: A semisubmersible, with a TCG of 0.5 foot to port, displaces 20,000 long tons. Bulk, weighing 400 long tons, is loaded in P-tanks located 50 feet starboard to the centerline. What is the new TCG?

    Y a. 0.49 foot starboard of centerline
    N b. 0.51 foot starboard of centerline
    N c. 0.99 foot starboard of centerline
    N d. 1.49 feet starboard of centerline

3597: The DEEP DRILLER has a KGT of 52.90 feet while at a draft of 58.0 feet. List is 2.0 feet to port. What is the value of TCG?

    N a. -0.10 foot
    N b. -0.13 foot
    Y c. -0.16 foot
    N d. -0.19 foot

3693: While drilling loaded as shown in Sample Load Form #4 (Drilling), the DEEP DRILLER suffers an unexpected but slowly increasing starboard and forward inclination. The wind and waves are light. This inclination could have been caused by __________.

    N a. the failure of mooring lines 7 and 8
    N b. the drilling crew dumping the mud
    N c. the drill string breaking
    Y d. ballast tanks equalizing into tank 1S

3765: When administering first aid you should avoid __________.

    N a. any conversation with the patient
    N b. instructing bystanders
    Y c. unnecessary haste and appearance of uncertainty
    N d. touching the patient before washing your hands

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

3850: Each personal flotation device light on an OSV that has a non-replaceable 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

3854: According to the regulations, the capacity of a liferaft is required to be marked __________.

    N a. on the Muster List ("Station Bill")
    Y b. at the liferaft stowage location
    N c. on the Certificate of Inspection
    N d. in the Operations Manual

4092: On which route is a towing vessel over 39.4 feet in length NOT required to carry an echo-sounding device?

    N a. Great Lakes
    N b. Inland Waters, other than the Western Rivers
    Y c. Western Rivers
    N d. Coastwise Routes

4284: Failure to comply with, or enforce, the provisions of the "Vessel Bridge-to-Bridge Radiotelephone Act" can result in a __________.

    Y a. $650 civil penalty charged against the person in charge of the vessel
    N b. $1500 civil penalty charged against the person in charge of the vessel
    N c. $500 criminal penalty charged against the Master
    N d. $1500 criminal penalty charged against the Master

4777: The COASTAL DRILLER is loaded as shown in the Sample Load Form #1 (Rig Move). While in field transit, the wind speeds are predicted to increase above 70 knots. What would be the new KGL if the legs are lowered to the recommended value?

    N a. 50.65 feet
    Y b. 37.00 feet
    N c. 36.53 feet
    N d. 13.65 feet

4785: What should you do with your emergency position indicating radio beacon if you are in a liferaft in a storm?

    Y a. Bring it inside the liferaft and leave it on.
    N b. Bring it inside the liferaft and turn it off until the storm passes.
    N c. Leave it outside the liferaft and leave it on.
    N d. Leave it outside the liferaft but turn it off.

5094: The mechanism that will release the tricing pendant, as shown, is __________. (D012SA )

    N a. the fore and aft gripes
    Y b. the McCluny hook
    N c. a quick release lever
    N d. a 3/4" shackle

5523: Before being certified by the American Bureau of Shipping, anchor chain must undergo __________.

    N a. USCG inspection
    Y b. a breaking test
    N c. x-ray inspection
    N d. spectroanalysis

5525: What does the proof test load of an anchor chain demonstrate?

    N a. The breaking strength of the anchor chain
    Y b. Strength of the anchor chain to a specified limit
    N c. Adequate holding power for new bottom conditions
    N d. Safe working load of the anchor chain

5781: In storm conditions, with the wind and waves from the port bow of the DEEP DRILLER in 600 feet water depth, the tensions in mooring line 1 and 2 are 400 kips. Completely slacking the mooring lines 5 and 6 reduces the tension in mooring lines 1 and 2 to about __________.

    N a. 375 kips
    Y b. 330 kips
    N c. 275 kips
    N d. 220 kips

5814: Your drafts are: FWD 18'-03", AFT 21'-09". What is the KM based on the tables in the blue pages of the Stability Data Reference Book?

    N a. 25.2 feet
    Y b. 25.6 feet
    N c. 25.9 feet
    N d. 26.3 feet

6131: How many fireman's outfits are required on a MODU?

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

6653: Diesel powered industrial trucks on a MODU that are provided with safeguards to the exhaust, fuel, and electrical systems are designated __________.

    N a. DEFE
    N b. DE
    Y c. DS
    N d. DES

6687: A MODU must have a self-contained breathing apparatus to be used as protection from gas leaking from a refrigeration unit. To meet this requirement, you may use __________.

    N a. a gas mask certified by the Mine Safety and Health Administration
    Y b. the same self-contained breathing apparatus required with the fireman's outfit
    N c. an oxygen breathing apparatus, provided that the device has been inspected within three years
    N d. a portable ventilation system that will provide a complete change of air every three minutes

7597: In small angle stability theory, the metacenter is located at the intersection of the inclined vertical centerline and a vertical line through __________.

    N a. G
    N b. F
    Y c. B
    N d. K

8747: If a severe storm threatens the COASTAL DRILLER while elevated, the setback in the derrick should be lowered and placed in the pipe rack. Its weight should be accounted for as __________.

    Y a. variable loads
    N b. drilling loads
    N c. environmental loads
    N d. fixed weight

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

9237: A MODU floating in sea water while displacing 20,000 long tons has transverse free surface moments of 7,500 ft-long tons and longitudinal free surface moments of 10,000 ft-long tons. The maximum virtual rise in the height of the center of gravity due to free surfaces is __________.

    N a. 0.35 foot
    Y b. 0.50 foot
    N c. 0.88 foot
    N d. 2.00 feet