单选题Scale and dirt accumulation in the waterside of a lube oil cooler will be indicated by a gradual increase in the lube oil（）.ATBN numberBviscosityCtemperatureDfoaming
单选题
Scale and dirt accumulation in the waterside of a lube oil cooler will be indicated by a gradual increase in the lube oil（）.
A
TBN number
B
viscosity
C
temperature
D
foaming
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