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.


19: The operator of the ship's radiotelephone, if the radiotelephone is carried voluntarily, must hold at least a __________.


55: Most minor spills of oil products are caused by __________.


119: What would be considered a vessel under the International Rules of the Road?


355: The center of flotation of a vessel is the point in the waterplane __________.

    Y a. about which the vessel lists and trims
    N b. which coincides with the center of buoyancy
    N c. which, in the absence of external forces, is always vertically aligned with the center of gravity
    N d. which is shown in the hydrostatic tables as VCB

590: The distance between the waterline of a vessel and the main deck is called __________.

    N a. draft
    Y b. freeboard
    N c. buoyancy
    N d. camber

777: On small passenger vessels a gasoline engine must be fitted with __________.

    N a. A means of backfire flame control
    N b. A lubricating oil pressure gauge and a tachometer
    N c. Jacket water discharge temperature gauges
    Y d. All of the above

1084: On small passenger vessels, what type of devices are required at both the tank and engine connections of all internal combustion engine fuel lines?

    N a. Clean out plates
    N b. Fuel gauges
    N c. Drain valves
    Y d. Shut-off valves

1121: In shown, number 1 operates the __________. (D011SA )

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

1313: The SS AMERICAN MARINER is ready to load the cargo listed. There is already 3224 tons of cargo on board with a KG of 29.8 feet. Use the white pages of the Stability Data Reference Book to determine the final KG of all the cargo after loading is completed. ST-0035

    N a. KG 27.2 feet
    N b. KG 27.8 feet
    N c. KG 28.4 feet
    Y d. KG 29.0 feet

1406: The principal danger from ice collecting on a vessel is the____________________.

    N a. decrease in capabilities of radar
    N b. decrease in displacement
    N c. adverse effect on trim
    Y d. loss of stability

1522: The pollution prevention regulations in MARPOL apply to U. S. flag vessels __________.

    N a. only on the Great Lakes and international waters
    N b. only on the western rivers and international waters
    N c. only on international voyages outside U.S. territorial waters
    Y d. on all international and inland waters

1549: You are sailing in a strong wind and may accidentally jibe when __________.

    N a. reaching
    N b. tacking
    Y c. running-free
    N d. in irons

1580: Which statement is TRUE concerning the placard entitled "Discharge of Oil Prohibited"?

    N a. It is required on all vessels.
    N b. It is only required in the wheelhouse.
    Y c. It may be located at the bilge and ballast pump control station.
    N d. All of the above

1608: Cold water, in commercial fishing, means water where the monthly mean low water temperature is normally __________.

    N a. 39°Fahrenheit or less
    N b. 44°Fahrenheit or less
    N c. 49°Fahrenheit or less
    Y d. 59°Fahrenheit or less

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

1659: You have berthed in a port area with other tank vessels. What signal is displayed by a vessel to indicate it is transferring flammable or combustible liquid cargo?

    N a. A flashing yellow light
    Y b. A red light visible all around the horizon
    N c. A green light visible all around the horizon
    N d. An illuminated red and yellow caution flag

1691: When anchoring a small sailing vessel in rough weather, the best anchor line would be composed of __________.

    N a. chain-wire
    N b. chain-manila
    Y c. chain-nylon
    N d. all chain

1709: Why is gas-freeing rarely required for LPG cargo tanks?

    N a. LPG is compatible with all cargos.
    N b. LPG's high oxygen content makes it nonvolatile.
    N c. Cargo tanks are inspected less frequently than on oil tankers.
    Y d. The cargo tanks are used for one type of cargo only.

1786: Which statement concerning reserve sources of energy for GMDSS is FALSE?

    N a. While the ship is at sea, there must be available at all times a supply of electrical energy sufficient to operate the radio installations and to charge any batteries used as part of a reserve source of energy.
    Y b. Both the VHF and MF/HF installations must be simultaneously supplied.
    N c. A means of ensuring a continuous supply of electrical power must be provided to all GMDSS equipment that could be affected by an interruption in power.
    N d. If a uninterrupted power supply or equivalent is used to supply power to the ship's GPS receiver or other source of positional information, a means must be provided to ensure the continuous supply of the information in the event of a failure to the ship's main or emergency source of power.

1898: Your vessel displaces 585 tons and measures 128'L by 26'B. What is the reduction in GM due to free surface if the fish hold (30'L by 18'B by 9'D) is filled with 2.8 feet of water? (Each foot of water weighs 15.4 tons)

    Y a. 0.66 foot
    N b. 1.12 feet
    N c. 1.37 feet
    N d. 1.58 feet

1933: The Sailing Plan, required by vessels participating in AMVER, must be sent __________.

    N a. within 12 hours of departure
    N b. within 24 hours of departure
    Y c. within a few hours before or after departure
    N d. prior to departure

1950: The lifesaving equipment on all vessels shall be __________.

    N a. inspected weekly
    N b. stowed in locked compartments
    Y c. readily accessible
    N d. tested yearly

1964: When crossing a bar in rough weather, you should enter on a(n) __________.

    N a. tidal bore
    N b. ebbing current
    Y c. flood current
    N d. All of the above

1983: What is required in addition to the heat, fuel, and oxygen of the fire triangle to have a fire?

    N a. Electricity
    Y b. Chain reaction
    N c. Pressure
    N d. Smoke

1998: Which satellite system promulgated Maritime Safety Information?

    N a. AMVER
    Y b. SafetyNET
    N c. NAVTEX
    N d. INMARSAT-M SES

2072: By regulation, cargo tank atmosphere must be inert before and during which operation?

    N a. stripping
    N b. topping off
    N c. gravitating
    Y d. All of the above

2153: On offshore drilling units each ring life buoy must be marked, in a contrasting color, with the unit's __________.

    Y a. name and port of registry
    N b. owner and port of registry
    N c. port of registry and identification number
    N d. name and owner

2311: What causes cavitation in a centrifugal pump?

    Y a. Vapor pockets in the flow stream
    N b. Rough impeller surfaces
    N c. Worn wearing rings
    N d. Heavy fluid in the flow stream

2375: An entry of water, gas, oil, or other formation fluid into the wellbore is called a __________.

    N a. blowout
    Y b. kick
    N c. gusher
    N d. flow

2386: What are the vessel equipment and personnel requirements for GMDSS?

    N a. Two licensed GMDSS radio operators
    N b. Equipment carriage requirements
    N c. Distress alerting and response
    Y d. All of the above

2546: Your vessel's drafts are: FWD 24'-07", AFT 25'-09"; and the KG is 24.0 feet. What is the righting moment when the vessel is inclined to 15°? (Use the selected stability curves in Section 1, the blue pages, of the Stability Data Reference Book)

    N a. 5,202 foot-tons
    Y b. 8,666 foot-tons
    N c. 10,876 foot-tons
    N d. 11,424 foot-tons

2621: The decks of a MODU are supported by transverse members called __________.

    N a. trusses
    N b. deck longitudinals
    Y c. deck beams
    N d. web frames

2634: 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 4 hold floods, the vessel will sink if the permeability exceeds what percent?

    N a. 40
    N b. 48
    N c. 53
    Y d. 60

2694: The heading of a vessel is indicated by what part of the compass?

    N a. Card
    N b. Needle
    Y c. Lubber's line
    N d. Gimbals

2704: What must be located on the discharge side of the pump in a fire main system?

    Y a. Pressure gauge
    N b. Strainer
    N c. Reduction valve
    N d. International shore connection

3000: 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

3229: The engine head, block, and exhaust manifold shall be __________. (small passenger vessel regulations)

    Y a. water jacketed
    N b. air cooled
    N c. preheated prior to starting
    N d. drained weekly

3418: Your 600 GT vessel must carry a line-throwing appliance if it is certificated for __________.

    N a. river service
    N b. Great Lakes service
    Y c. coastwise service
    N d. None of the above

3543: The DEEP DRILLER's lightweight is the condition prior to loading __________.

    N a. deck load
    N b. deck load and lower-hull liquids
    N c. deck load, lower-hull liquids, and external loads
    Y d. deck load, lower-hull liquids, external loads, and deploying anchors

3695: In storm conditions, when the environmental conditions are such that the DEEP DRILLER has disconnected the marine riser, the two leeward mooring lines should be __________.

    N a. tightened
    N b. slacked slightly
    Y c. completely slacked
    N d. adjusted to give the same line tensions as the windward lines

3810: If help has not arrived in 10-12 hours after having abandoned an OSV in a survival craft, you should __________.

    N a. go in one direction until the fuel runs out
    N b. plot course for the nearest land
    N c. take a vote on the direction in which to go
    Y d. shutdown the engines and put out the sea anchor

3966: In the illustration shown, the righting strap is shown as item number __________. (D014SA )

    N a. 8
    N b. 9
    N c. 12
    Y d. 16

3969: The sea anchor shown as item number 14 will NOT __________. (D014SA )

    N a. check the liferaft's way
    N b. keep the liferaft end on to the sea
    N c. reduce the possibility of capsizing or broaching
    Y d. right the raft if it inflates inverted

3974: In the illustration, the sea anchor is shown as item number_____. (D014SA )

    N a. 7
    N b. 13
    N c. 15
    Y d. 14

4393: Environmental loading consists of the forces caused by wind, waves, and __________.

    N a. drilling
    N b. soil reactions
    N c. temperature
    Y d. current

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

4593: The COASTAL DRILLER, while drilling, has a total weight of 15,400 kips. The LCG is 120.00 feet AF0, and the TCG is -0.5 feet to port of the centerline. What is the port leg reaction?

    N a. 5,063 kips
    N b. 5,104 kips
    Y c. 5,233 kips
    N d. 5,345 kips

4812: The SS AMERICAN MARINER is ready to bunker with drafts of FWD 21'-04", AFT 26'-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-0170

    Y a. 0.54 ft
    N b. 0.62 ft
    N c. 0.80 ft
    N d. 0.85 ft

5483: The idler sheave which directs and turns the anchor cable from a semisubmersible is known as the __________.

    Y a. swivel fairlead
    N b. windlass wildcat
    N c. chain stopper
    N d. chain director

5505: Which problem is virtually impossible to detect during an in-service inspection of used mooring chain?

    N a. Cracks
    N b. Elongation
    N c. Loose studs
    Y d. Fatigue

5653: On a semisubmersible drilling unit, decreasing riser tension increases __________.

    N a. free surface moments
    N b. KM
    Y c. GM
    N d. KG

6004: 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-0189

    N a. Available GM 4.1 ft
    N b. Available GM 4.3 ft
    Y c. Available GM 4.7 ft
    N d. Available GM 5.1 ft

6647: For means of abandonment of a MODU, which type of embarkation does not require prior approval by the Coast Guard?

    N a. Movable ladders
    Y b. Fixed ladders
    N c. Safety booms
    N d. Elevators

6753: If not attached to the nozzle, each low-velocity spray applicator on a MODU must be stowed __________.

    N a. in a protected area on the main deck
    N b. inside a machinery space near the entrance
    Y c. next to the fire hydrant to which the fire hose is attached
    N d. on a rack inside the quarters near the entrance

7587: The geometric center of the underwater volume is known as the __________.

    N a. center of flotation
    N b. tipping center
    N c. center of gravity
    Y d. center of buoyancy

8217: What is the purpose of a striker plate?

    N a. Provides surface for applying force on machinery
    Y b. Provides landing surface for the sounding bob
    N c. Absorbs machinery vibration
    N d. Prevents valve stem over-travel

8313: The worst atmospheric condition for dispersion of H2S is __________.

    N a. heavy rain
    N b. gusty winds with rain
    Y c. nearly calm, clear nights or early morning
    N d. full sun with high winds

8337: What is the percentage of oxygen in a typical sample of uncontaminated air?

    N a. 12 percent
    N b. 15 percent
    N c. 18 percent
    Y d. 21 percent

8351: What is a pinion in a jacking system?

    N a. Flexible coupling
    N b. Flexible shaft
    N c. Flexible joint
    Y d. Gearwheel

8431: The International Oil Pollution Prevention (IOPP) Certificate required by MARPOL is issued to U.S. flag MODUs by the __________.

    N a. International Maritime Organization
    Y b. U.S. Coast Guard
    N c. American Bureau of Shipping
    N d. Environmental Protection Agency