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單項(xiàng)選擇題

Badly leaking refrigeration compressor discharge valves will cause（）.

A.overfeeding of the expansion valve
B.damage to the condenser
C.constant running of the compressor
D.flooding of the receiver

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單項(xiàng)選擇題

Mechanical energy in transition is referred to as （）.

A.horsepower
B.work
C.heat
D.velocity

單項(xiàng)選擇題

If you change from a low pour point lubricant to a high pour point lubricant in a refrigeration system, （）.

A.compressor lubrication will be improved
B.oil will not leave the crankcase
C.compressor valves will be damaged
D.oil may congeal in the evaporator

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