A、during abandon drill
B、during fire drill
C、weekly
D、when the rig is being moved
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A、A.structural bulkhead B、B.exterior bulkhead C、C.centerline bulkhead D、D.joiner bulkhead
A、transferring drill water B、dumping bulk materials C、pumping out flooded compartments D、evacuating the unit
A、also called GM B、the void portion of the ship below the waterline which is enclosed and watertight C、affected by the number of transverse watertight bulkheads D、the watertight portion of a vessel above the waterline
A、A.non-synchronous electric motor B、B.synchronous electric motor C、C.fully enclosed electric motor D、D.watertight electric motor
A、prevent the passage of flammable gases B、prevent the passage of poisonous vapors C、delay the spread of heat and flames D、maintain watertight integrity
A、There are several types of hatch covers on board ship. B、There are several types of hatches on board ship. C、There is one type of hatches on board ship. D、There is one type of hatch covers on board ship.
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