Low compression pressure in a diesel engine can be caused by（）

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• A drop in compression pressure in one cylinder of a diesel engine can be caused by（）

  A . a leaking fuel injection nozzle B . a clogged air filter C . early fuel injection D . burned valve

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• Low compression pressure in a diesel engine is caused by（）

  A . low water in the expansion tank B . improperly seated valves C . low fuel oil pressure D . worn or broken cylinder liner sealing ring

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• A sudden drop in diesel engine cylinder compression pressure can be caused by（）

  A . a leaking fuel injector nozzle B . a clogged air filter C . excessively early fuel injection D . malfunctioning valve

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• The fresh air coming in through the inner air ports, is compressed by（） to a higher pressure.

  A . the cylinder head B . the cross-head C . the moving piston D . the stationary pisto

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• How are the pressure and temperature affected in a diesel engine cylinder during compression?（）

  A . Pressure and temperature decrease B . Pressure and temperature increase C . Pressure decreases and temperature increases D . Pressure increases and temperature decrease

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• A sudden drop in compression pressure in one cylinder of a diesel engine can be caused by（）

  A . a leaking fuel injector nozzle B . a clogged air filter C . excessively early fuel injection D . malfunctioning valve

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• Low compression in a diesel engine can be caused by （）

  A . clogged coolant passages B . a leaking cylinder head gasket C . low fuel oil pressure D . worn or broken cylinder liner sealing ring

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• Leaky exhaust valve will result in which of the following?（） (1) high exhaust temperature; (2) low compression pressure; (3) low firing pressure.

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• Low compression in a diesel engine could be caused by（）

  A . worn or broken cylinder liner sealing rings B . high cooling water temperature C . worn or broken piston rings D . low fuel oil pressure

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• 207. The greater the pressure difference between a high and a low pressure center, the ______ .

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• Low compression pressure in a diesel engine can be caused by_____________.

  A.improperly seating intake valves B.leaking cylinder liner seal rings C.late fuel injection timing D.carbon deposits on the piston

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• Leaky exhaust valve will result in which of the following？①high exhausttemperature ②low compression ③low firing pressure

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• Low compression pressure in a diesel engine is caused by___________.

  A.low water in the expansion tank B.improperly seated valves C.low fuel oil pressure D.worn or broken cylinder liner sealing rings

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• When the pressure gets low, the boiling-point becomes low. 气压变低，沸点就变低。

  A．omission B．combination C．addition D．obverse

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