單項選擇題After fitting back in place the gear wheels, don’t forget to () them.

A.fulfill
B.eliminate
C.grease
D.bend


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1.單項選擇題What separate the high pressure side from the low pressure side in a refrigeration system?()

A.Condenser and thermal expansion valve
B.King and solenoid valves
C.Compressor and thermal expansion valve
D.Condenser and solenoid valve

2.單項選擇題Which of the following best describes “overcharge of refrigerant”?()

A.Too much refrigerant
B.Too little refrigerant
C.Refrigerant is ran out
D.Running is over

3.單項選擇題The presence of air in the condenser of a refrigeration system will () the condensing pressure.

A.increase
B.reduce
C.maintain constant
D.None of the above is true