單項選擇題In setting the valves on a steam-smothering system on a tanker,the master control valve to cargo tanks should be().

A.open and individual tank valves open
B.open and the individual tank valves closed
C.closed and the individual tank valves closed
D.closed and the individual tank valves open


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1.單項選擇題In order to reduce the accumulation of static electricity while loading petroleum products,you should().

A.start to load at maximum pressure
B.start to load slowly
C.increase the air flow into the tank
D.use the overall method of loading only

3.單項選擇題How must each storage tank for helicopter fuel on a ship be marked?()

A.DANGER - KEEP AWAY
B.DANGER - EXPLOSIVE VAPORS
C.DANGER - NO SMOKING
D.DANGER - FLAMMABLE LIQUID

4.單項選擇題If the Certificate of Inspection of a damaged tank barge has expired,which certificate may be issued to allow its movement to a repair facility? ()

A.Change of employment
B.Permit to proceed
C.Application for inspection
D.Temporary Certificate of Inspection

5.單項選擇題Gasoline fuel tank vents should terminate().

A.in the engine compartment
B.in the fuel tank space
C.above or outside the hull
D.at the most convenient location