A.A large change of viscosity occurs with a minor change in temperature
B.No change in viscosity occurs with any change in temperature
C.Very little change in viscosity occurs with a significant change in temperature
D.The viscosity of the oil increases with an increase in temperature
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A.pump would be very noisy
B.pump would vibrate excessively
C.pump would develop insufficient flow
D.stuffing box would leak excessively
A.gravity and feed oil cups
B.grease cups
C.hand during installation
D.leakage through the stuffing box
A.a needle gun
B.soap and water
C.a wire brush
D.a chipping hammer
A.Hydrochloric acid
B.Chlorine
C.Sulfuric acid
D.Zinc chromate
A.absolute humidity
B.relative humidity
C.specific humidity
D.total humidity
最新試題
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Which of the following problems could cause the high pressure cutout switch to shut down the compressor in a refrigeration system?（）
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