The most serious effect of air trapped in a diesel engine jacket water cooling system is that it（）.<br>A:causes colloid suspension in the cooling water<br>B:reduces the capability of the lubrication system<br>C:can form pockets which block the flow of coolant through the system<br>D:leads to the scuffing of cylinder walls

The most serious effect of air trapped in a diesel engine jacket water cooling system is that it（）.
A:causes colloid suspension in the cooling water
B:reduces the capability of the lubrication system
C:can form pockets which block the flow of coolant through the system
D:leads to the scuffing of cylinder walls

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