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全部科目 > 水路交通运输技能考试 > 海船船员考试 > 船舶管理(轮机专业) > 轮机英语 > 船舶电气与船舶安全

单项选择题

During compressors running the accumulated moisture in the separators must be （）.

A.drained off
B.collected
C.sent to the crankcases
D.separated with oil

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单项选择题

By far the greatest use is for diesel engine starting using air pressure of 25 bar or more provided by （）.

A.rotary compressors
B.reciprocating compressors
C.centrifugal compressors
D.screw compressors

单项选择题

Compressed air is used on board ship for all the following purposes except （）.

A.starting diesel engines
B.pneumatic control systems
C.pneumatic tools
D.supercharging air

单项选择题

Low pressure air is usually taken through （） or pressure regulators to a low pressure reservoir supplying a ring main through driers.

A.globe valves
B.butterfly valves
C.gate valves
D.reducing valves

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