问题：
[单选] Crank web deflection readings will give a positive indication of （）.
worn main bearing journals。torsional stress deformation。slack thrust bearings。bearing shells shim dimensio。
问题：
[单选] What preventative maintenance should be done frequently to diesel engine starting air receivers?（）
Drain the accumulated moisture。Test the relief valves。Watch the temperature to prevent fluctuations in pressure。Clean the interior to remove oil and foreign matter。
问题：
[单选] Fusible plugs are installed in fire-tube boilers to （）.
provide a means of draining the boiler。warn the engineer of low water level。cool the crown sheet at high firing rates。open the burners electrical firing circuit。
问题：
[单选] Friction developing between the moving parts of a governor, governor linkage and control valve will cause the governor to （）.
react with insufficient speed droop。fail to react to small speed changes。have excessive sensitivity to small speed changes。remain in the neutral positio。
问题：
[单选] Which of the following methods is normally used to lubricate bearings in a small high-speed diesel engine?（）
Splash lubrication。Pressure lubrication。Sight feed lubricators。Mechanical lubricator。
问题：
[单选] A large change in ambient temperature, or using an oil of a viscosity different from the one recommended by the manufacturer in a mechanical hydraulic governor, will result in the need to adjust the （）.
pilot valve opening。compensating needle valve。compensating spring tension。accumulator spring tensio。
问题：
[单选] To check the setting of the overspeed trip on a diesel powered generator, you would use a （）.
tachometer。torsion meter。dynamometer。pony brake。
问题：
[单选] In a naturally aspirated diesel engine, the volume of air intake is directly related to engine （）.
compression ratio。valve size。fuel pressure。cylinder clearance volume。
问题：
[单选] Two important considerations for the proper lubrication of a diesel engine include the delivery of the oil in sufficient amount and the （）.
cetane number。pour point。viscosity temperature。quality of the oil。
问题：
[单选] Friction, engine wear and oil consumption in a diesel engine are directly related to the （）.
acidity of the oil。pour point of the oil。flash point of the oil。viscosity of the oil。
