The four-stroke engine is used for （） and sometimes for main propulsion with a gearbox to provide a propeller speed of between 90 to 120 rev/min.
- Aalternator
- Bturbo-charger
- Cremote controller
- Dwindla
问题
The four-stroke engine is used for （）
参考解析：
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1、By far the greatest use is for diesel
By far the greatest use is for diesel engine starting using air pressure of 25 bar or more provided by （）.Arotary compressorsBreciprocating compressorsCcentrifugal compressorsDscrew compressor
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2、For an ordinary four-stroke engine the
For an ordinary four-stroke engine the exhaust valves open （）.Aafter TDCBbefore TDCCafter BDCDbefore BDC
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3、The （） engine is used for alternators
The （） engine is used for alternators and sometimes for main propulsion with a gearbox to provide a propeller of between 90 to 120 rpm.Afour-strokeBtwo-strokeCslow speedDreversible
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For most ship engines，the fuel is（）.Anatural gasBdiesel oilCpropaneDbunker fuel
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5、In the four-stroke engine, it takes （）
In the four-stroke engine, it takes （） to make one power stroke.Aone propulsionBtwo propulsionsCtwo revolutionsDone revolutio
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6、Fresh water is used for the cooling of
Fresh water is used for the cooling of cylinder jackets and （） of the marine diesel engine.Acylinder coversBlubricating spaceCcrossheadDexhaust manifold