The ratio of the work done by the machine（）the work done on it is called the efficiency of the machine.

A、against

B、with

C、to

D、for

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更多“The ratio of the work done by the machine（）the work done on it is called the efficiency of the machine.”相关的问题

第1题

[单选题] The ratio of the height of a vessel’s rudder to its width is referred to as the（）.

A、aspect ratio B、constriction ratio C、rudder ratio D、steering ratio

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第2题

[单选题] Which of the following relationships should occur between the temperature developed in a combustion space, and the compression ratio of the engine?（）

A、Higher compression ratios create higher temperature B、Higher temperatures create higher compression ratios C、low temperatures create higher compression ratios D、Higher compression ratios create low temperatures

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第3题

[] The figure that the volume of air at BDC is divided by the volume of air at TDC is termed as（）.

A、A.ignition ratio B、B.power ratio C、C.compression ratio D、D.injection ratio

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第4题

[单选题] For a given fuel, a change in the compression ratio will affect the ignition lag by which of the listed means?（）

A、An increase in compression ratio will increase the ignition lag B、An increase in compression ratio will decrease the ignition lag C、A decrease in compression ratio will decrease the ignition lag D、A decrease in ignition lag will increase the compression ratio

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第5题

[单选题] On most diesel engines, the governor controls the output speed by （）.

A、controlling the amount of fuel injected into the cylinders B、varying the speed of the turbocharger C、adjusting the compression ratio D、changing the timing of the fuel injection camshaft