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【单项选择题】

In a two-stroke/cycle diesel engine, the exhaust gases are expelled from the cylinder by the()

A、A.exhaust manifold

B、B.valve bridge

C、C.pressure of the fresh air charge

D、D.valve adjusting gear

更多“In a two-stroke/cycle diesel engine, the exhaust gases are expelled from the cylinder by the()”相关的问题
第1题

Atwo crankshaft revolutions in a two-stroke/cycle engine  B、two power strokes in a two-stroke/cycle engine  C、one power stroke in a two-stroke/cycle engine  D、two piston strokes in a two-stroke/cycle engine  

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第2题

AIn a two-stroke/cycle engine, the rings run hotter, requiring the end gap to be greater  B、Some provision must be made in a two-stroke/cycle engine to keep the rings from binding in the ports  C、No gap is required to exist between the ends of the ring when cold in a two-stroke/cycle engine, but a small gap is required in a four-stoke/cycle engine  D、The gaps should be staggered on either side of a piston in a two-stroke/cycle engine, while staggering is not necessary in a four-stroke/cycle engine  

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第3题

A、bearing pressure in a four-stroke\cycle acting single diesel engine is continually reversed  B、bearing pressure in a two-stroke\cycle single acting diesel engine is continually reversed  C、the maximum bearing pressure is higher in a single acting two-stroke/cycle diesel engine  D、two-stoke/cycle diesel engines require more complicated lubrication piping  

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第4题

A、most critical in a four-stroke cycle diesel engine  B、most critical in a two-stroke/cycle diesel engine  C、most critical in a four-stroke/cycle diesel engine if it is turbocharged  D、of equal importance in a two-stroke/cycle diesel engine as in a four-stroke/cycle diesel engine  

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第5题

A、one half crankshaft speed in a two-stroke cycle diesel engine  B、crankshaft speed in a two-stroke cycle diesel engine  C、two times crankshaft speed in a two-stroke cycle diesel engine  D、one-fourth times crankshaft speed in a four-stroke cycle diesel engine  

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第6题

A、has little or no internal friction  B、has a lower effective compression ratio  C、operates with scavenge air under a positive pressure  D、operates without energy absorbing intake and exhaust strokes  

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第7题

AA.opposed-piston engine  B、B.double-acting engine  C、C.two-stroke/cycle engine  D、D.four-stroke/cycle engine  

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第8题

Aa two-stroke engine works without exhaust operation  B、a two-stroke engine works without compression stroke  C、a two-stroke engine works without expansion stroke  D、a two-stroke engine works without suction operation  

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第9题

A、once every crankshaft revolution  B、once every two crankshaft revolutions  C、once every piston stroke  D、twice every piston stoke  

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第10题

A、the same indicated horsepower as a four-stroke/cycle engine  B、twice the indicated horsepower as a four-stroke/cycle engine  C、one half indicated horsepower as a four-stroke/cycle engine  D、one power stroke for every two crankshaft revolutions  

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