單項(xiàng)選擇題

Accidental flooding of the engine room bilges by the bilge main is prevented by （）.

A.stop-check valves installed in the bilge manifolds
B.using a positive displacement reciprocating bilge pump
C.installing eductors in all bilge rose boxes
D.installing a swing check before each bilge valve

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單項(xiàng)選擇題

Zinc rods are installed in the refrigeration system （）.

A.liquid strainer
B.liquid receiver
C.saltwater condenser
D.evaporator

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（）is a series of trials done at sea to determine whether the ship has met the specifications of design, modification, or repair.

A.SEA WORTHINESS
B.SEA TRIALS
C.TRIAL-AND-ERROR
D.DOCK TRIALS