搜题

【单选题】

Air cocks, usually positioned at the （） in a circulating system, is used to get rid of the air in the system.

A、bending joint

B、expansion tank

C、weld

D、the highest point

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更多“Air cocks, usually positioned at the （） in a circulating system, is used to get rid of the air in the system.”相关的问题

第1题

[单选题] The starting air system usually has （） to prevent starting if anything is not in order.

A、drain cocks  B、vent valves  C、counteracts  D、interlocks  

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第2题

[单选题] （） supplies pilot air to control the cylinder air start valves.

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

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第3题

[] （） is usually driven by the engine camshaft and supplies pilot air to the cylinder air start valve.

A、A.An air receiver  B、B.An operating valve  C、C.An automatic valve  D、D.An air distributor  

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第4题

[单选题] The pressurized air is usually cooled to increase the charge air （）.

A、viscosity  B、density  C、velocity  D、electricity  

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第5题

[单选题] The pressure of pilot air is usually （） than that of starting air.

A、higher  B、lower  C、low  D、high  

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第6题

[判断题] In international air cargo transportation， Specific Commodity Rates are usually lower than General Cargo Rates.

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第7题

[] In international air cargo transportation， Specific Commodity Rates are usually lower than General Cargo Rates.

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第8题

[判断题] In international air cargo transportation， Specific Commodity Rates are usually lower than General Cargo Rates.

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第9题

[单选题] Failure to open the diesel engine test cocks after a long period of shutdown, prior to starting may result in （）

A、an air bound fuel system  B、damage to cylinder heads and pistons  C、excessive fuel injection  D、excessive air valve lift  

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