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單項(xiàng)選擇題

Thermal energy in transition is also referred to as （）.

A.heat
B.power
C.horsepower
D.foot-pound

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單項(xiàng)選擇題

Noise in a refrigeration compressor can be caused by （）.

A.worn bearings and piston pins
B.slugging due to flooding back
C.too much oil in circulation
D.All of the above

單項(xiàng)選擇題

The air charge leaving an intercooler, or after-cooler of an air compressor can be expected to be （）.

A.superheated
B.super-cooled
C.at or below the dew point
D.All of the above