If liquid refrigerant accidentally comes in contact with the

If the superheat value of a thermostatic expansion valve is set too low, the _.

A.the suction line will be abnormally cold and liquid may slug back to the compressor

B.the suction line will be hot due to a reduced amount of refrigerant returning to the compressor

C.the temperature of the refrigerant within the condenser will remain the same

D.the temperature of the refrigerant passing through the sub-cooler will decrease

Sub-cooling is a method of reducing the temperature of the liquid refrigerant below its ______.

A.freezing point

B.floc point(浊点)

C.condensing temperature

D.compression temperature

If the refrigeration compressor crankcase is sweating, the cause may be due to

A.a shortage of refrigerant

B.the compressor running continuously

C.liquid refrigerant returning to the compressor

D.the compressor short cycling on the high pressure cutout

If liquid refrigerant accidentally comes in contact with the eyes, _____ immediately.

A.rub the eyes

B.irritate the eyes

C.wash the eyes with a heavy boric acid solution

D.obtain medical help

A hygroscopic cargo is defined as a cargo ______．

A.capable of absorbing moisture in the form of a gas

B.capable of giving off moisture in the form of a liquid

C.that is shipped in a liquid state

D.that will ignite in contact with water

To add refrigerant to the low side of an air conditioning system, the refrigerant should be introduced through the_______ .

A.suction service valve as a vapor

B.suction service valve as a liquid

C.discharge service valve as a vapor

D.charging valve as a liquid