单选题If the relief valve on the discharge side of a hydraulic pump lifts, the cause could be （）.Aa low load on the unitBa clogged pump suction strainerCa blockage in the line between the pump and hydraulic motorDthe hydraulic motor turning too fast
单选题
If the relief valve on the discharge side of a hydraulic pump lifts, the cause could be （）.
A
a low load on the unit
B
a clogged pump suction strainer
C
a blockage in the line between the pump and hydraulic motor
D
the hydraulic motor turning too fast
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