Any increase in the exhaust back pressure of a four-stroke/cycle diesel enginewill( ).

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Any increase in the exhaust back pressure of a four-stroke/cycle diesel enginewill( ).

A.reduce engine horsepower output

B.aid in silencing the exhaust noise

C.increase the mean effective pressure

D.contribute to effective cylinder scavenging

参考答案:

A解析:aid:援助;contribute to:对…起作用译文:四冲程柴油机排气背压升高将会减少发动机的功率输出。

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