A.two knock
B.three knocks
C.four knocks
D.five knocks
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A.fire fighting
B.leakage blocking
C.abandon ship
D.integration
A.the emergency lighting system for muster and abandon ship
B.air oil emergency shut-down
C.ME emergency operation
D.main auxiliary steering gear changing
A.the chief engineer leaves the engineer room with the engine room log book at first
B.releasing compressed air in the air receiver and closing the watertight door
C.stopping all the running machineries and electric devices
D.closing the quick-closing valves of all the oil tanks, stopping the boiler and releasing gas
A.4
B.3
C.2
D.1
A.must connect the bilge well suction directly
B.should not pump out the water accumulated in the cargos
C.should not used for emergency drainage in case of ship collision
D.should connect to the fire fighting system directly
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