Air compressor cylinder un-loaders enable the compressor to （）.

A、vary their speed according to temperature and load

B、start and come up to speed before air compression begins

C、change speed according to overload demands

D、reduce compressed air charge density

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更多“Air compressor cylinder un-loaders enable the compressor to （）.”相关的问题

第1题

[单选题] （）are supplied by main switchboard directly.

A、Suez Canal searchlight, air compressor and air conditioning compressor B、Air compressor, boiler blower and refrigeration plant C、Boiler blower, Suez Canal searchlight and refrigeration plant D、Suez canal searchlight, air compressor and boiler blower

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第2题

[单选题] Which of the listed operating conditions would have the greatest effect on the volumetric efficiency of an operating reciprocating air compressor?（）

A、The density of the air entering the compressor B、The temperature of the air entering the compressor C、The designed rotating speed of the compressor D、A leaking head gasket

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第3题

[单选题] 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

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第4题

[单选题] Broken valve strips in an operating low pressure, air compressor will cause （）.

A、an immediate crankcase explosion B、oil contamination in the compressed air C、a decrease in compressor capacity D、no immediate loss of the compressed air capacity

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第5题

[单选题] The starting air bottle should be pumped up to maximum pressure by the （） before start of the engine.

A、air compressor B、refrigeration compressor C、vacuum pump D、purifier

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第6题

[单选题] The air compressor pumps air to the（）.

A、engine cylinder B、air bottle C、evaporator D、condenser

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第7题

[单选题] 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