The only means of removing the latent heat of condensation from a refrigerant in the normal refrigeration cycle is by _____.

A:passing it through the expansion valve B:condensing refrigerant in the system condenser C:passing the gaseous refrigerant through the heat interchanger on the suction sideof the compressor D:maintaining a high pressure on the systems receiver

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

Moisture in the refrigerant may _____.

A:freeze on the expansion valve seat and reduce the flow of liquid refrigerant B:emulsify the oil in the condenser C:freeze in the king valve D:clog the oil trap

Which of the problems listed could be indicated if a sight glass in the refrigerant liquid line is full of bubbles? .

A:Proper refrigerant charge B:Faulty expansion valve C:Insufficient refrigerant D:Solenoid valve stuck open

Refrigerant is normally sub-cooled in a refrigeration or air conditioning system condenser to _____.

A:maintain adequate coil back pressure B:prohibit flashing in the liquid line C:reduce refrigerant volume in the system D:reduce compressor discharge line loading

The temperature of the refrigerant in the evaporator coil depends mostly upon the _____.

A:refrigerant pressure in the evaporator B:cooling water temperature to the condenser C:heat load in the refrigerator compartment D:solenoid valve in the liquid line

A refrigerant with oil in solution has a _____.

A:higher boiling temperature for a given pressure than does a pure refrigerant B:lower boiling temperature for a given pressure than does a pure refrigerant C:boiling pressure equal to that of a pure refrigerant at a given pressure D:boiling point will not be affected by entrained oil

In a chilled water air conditioning unit using a reciprocating compressor, the refrigerating effect of the primary refrigerant can be increased by ______.

A:increasing refrigerant pressure in the coil B:increasing chilled water flow through the cooler C:sub-cooling the refrigerant in the condenser D:superheating the refrigerant in the compressor

Before charging a refrigeration unit, the refrigerant charging lines should be .

A:flushed with clean refrigerant oil B:purged with the refrigerant C:washed with an ammonia and alcohol solution D:grounded to compressor