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【单选题】

An air compressor can be unloaded at start-up by ().

A、holding the discharge valve open

B、relieving the intercooler pressure to the atmosphere

C、using an enlarged, permanently opened clearance expansion space

D、a pre-charged accumulator

更多“An air compressor can be unloaded at start-up by ().”相关的问题
第1题

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

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第2题

A、An air compressor  B、An indicator cock  C、An air distributor  D、A safety valve  

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第3题

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4题

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6题

A、A.bypass the high pressure stage to the low pressure stage on 100% of the air compressors in service  B、B.prevent excessive inter-stage pressure buildup  C、C.control compressor discharge pressure  D、D.remove all but the frictional load during starting  

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第7题

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8题

A、increase compressor discharge pressure on demand  B、increase compressor operating speed as necessary  C、allow the motor to turn the compressor opposed only by friction  D、reduce the compressor frictional load when starting  

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第9题

A、noise coming from that air starting valve  B、continuous operation of the starting air compressor  C、zero air pressure in the air starting system  D、overheated starting air pipe to the cylinder head  

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第10题

A、broken inlet valves  B、broken discharge valves  C、pulsations in the air distribution system  D、overloading of the air distribution system  

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