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單項(xiàng)選擇題

The only type of helicopter that may be refueled with the engine running and the blades turning is（）.

A.a helicopter carrying cargo only
B.a turbine-equipped helicopter
C.a Sikorsky
D.a helicopter carrying injured personnel in an emergency situation

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單項(xiàng)選擇題

The most likely location for a liquid cargo fire to occur on a tanker would be（）.

A.in the midships house
B.at the main deck manifold
C.at the vent header
D.in the pumproom

單項(xiàng)選擇題

The major cause of anchor buoy pendant wire failures is（）.

A.corrosion
B.rough weather
C.defective sockets
D.mishandling