單項(xiàng)選擇題

The ability of an oil to separate cleanly from an oil and water mixture is referred to as its （）.

A.precipitation number
B.neutralization number
C.pour point
D.demulsibility

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單項(xiàng)選擇題

When the relief valve opens it discharges high pressure refrigerant vapor to the （）.

A.liquid strainer
B.refrigerant inlet of the condenser
C.inlet side of the evaporator
D.suction side of the compressor

單項(xiàng)選擇題

If the discharge valve is closed before the drive motor is stopped, which of the following types of pumps will most likely be damaged?（）

A.Centrifugal
B.Gear
C.Propeller
D.Turbine