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單項(xiàng)選擇題

An auxiliary reservoir for starting auxiliary engines should be kept at （）.

A.low pressure at all times
B.full pressure at all times
C.low pressure at intermittence
D.full pressure at intermittence

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單項(xiàng)選擇題

Starting air for auxiliary engines may be taken directly from the main reservoirs or through （）.

A.an auxiliary reservoir
B.a controlling air bottle
C.an emergency air compressor
D.a main air compressor

單項(xiàng)選擇題

Two main lubricating oil pumps are usual and are obligatory in （）.

A.container ships
B.bulk carriers
C.passenger ships
D.barges