單項(xiàng)選擇題In a naturally aspirated diesel engine, the volume of air intake is directly related to engine ().

A.compression ratio
B.valve size
C.fuel pressure
D.cylinder clearance volume


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1.單項(xiàng)選擇題To check the setting of the overspeed trip on a diesel powered generator, you would use a ().

A.tachometer
B.torsion meter
C.dynamometer
D.pony brake

3.單項(xiàng)選擇題Which of the following methods is normally used to lubricate bearings in a small high-speed diesel engine?()

A.Splash lubrication
B.Pressure lubrication
C.Sight feed lubricators
D.Mechanical lubricators

4.單項(xiàng)選擇題Friction developing between the moving parts of a governor, governor linkage and control valve will cause the governor to ().

A.react with insufficient speed droop
B.fail to react to small speed changes
C.have excessive sensitivity to small speed changes
D.remain in the neutral position

5.單項(xiàng)選擇題Fusible plugs are installed in fire-tube boilers to ().

A.provide a means of draining the boiler
B.warn the engineer of low water level
C.cool the crown sheet at high firing rates
D.open the burners electrical firing circuits