单项选择题
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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相关考题
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单项选择题
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 -
单项选择题
Two main lubricating oil pumps are usual and are obligatory in （）.
A.container ships
B.bulk carriers
C.passenger ships
D.barges -
单项选择题
In motor-ships, （）, after passing through main and motion bearings and oil cooled pistons, etcis either retained in the bedplate.
A.the fuel oil
B.the lubricating oil
C.the refrigerating oil
D.the hydraulic oil
