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
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A.actuation
B.sensitivity
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D.thrust shaft -
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An individual injection pump is designed for variable beginning and constant ending of injectionFor diesel engines operating at constant speeds, the start of injection will（）
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The purpose of the compensating adjustment used in a diesel engine hydraulic governor is to （）
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B.increase governor promptness
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