单项选择题
The amount of fuel delivered by a helical plunger fuel injection pump is controlled by （）
A.varying the pump discharge pressure
B.varying the pump return pressure
C.rotation of the pump plunger
D.rotation of the pump barrel
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相关考题
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单项选择题
On a diesel engine equipped with a hydraulic speed control governor, hunting in many cases can be corrected by adjusting the （）
A.accumulator spring compressor
B.balance piston
C.compensating needle valve
D.proportional piston -
单项选择题
Which of the following adjustments is always required whenever the diesel engine governor oil has been drained and renewed?（）
A.speed droop
B.compensation
C.idle speed setting
D.load limit control -
单项选择题
Which of the following statements represents an advantage of an electromagnetic clutch?（）
A.Large misalignments can be tolerated between the shaft and engine coupling
B.Slip is held to a minimum when reversing shaft rotation
C.Engine torsion vibrations to the driven shaft are eliminated
D.It aids in maintaining power factor
