单选题If the water level dropped rapidly in the expansion tank of a closed diesel engine cooling water system, you should suspect a （）.Aloss of suction in the circulating pumpBleak in the primary cooling systemCbroken raw water pump shaftDburned or cracked piston in one cylinder
单选题
If the water level dropped rapidly in the expansion tank of a closed diesel engine cooling water system, you should suspect a （）.
A
loss of suction in the circulating pump
B
leak in the primary cooling system
C
broken raw water pump shaft
D
burned or cracked piston in one cylinder
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相关考题：
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