单选题Excessive lube oil consumption by a reciprocating air compressor can be caused by （）.Ausing a slightly dirty air filterBusing oil having an excessive viscosityCintercooler or after-cooler leaksDcarrying the oil level higher than normal
单选题
Excessive lube oil consumption by a reciprocating air compressor can be caused by （）.
A
using a slightly dirty air filter
B
using oil having an excessive viscosity
C
intercooler or after-cooler leaks
D
carrying the oil level higher than normal
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