单选题Sludge may be formed in the oil in the crankcase of a reciprocating air conditioning compressor as a result of （）Arefrigerant bubbles in the lube oilBrefrigerant reducing the lube oil viscosityCoxidation of the lube oil from overheatingDreducing the floc or cloud point of the oil
单选题
Sludge may be formed in the oil in the crankcase of a reciprocating air conditioning compressor as a result of （）
A
refrigerant bubbles in the lube oil
B
refrigerant reducing the lube oil viscosity
C
oxidation of the lube oil from overheating
D
reducing the floc or cloud point of the oil
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