HVAC REVIEW EXAM QUESTIONS WITH 100% CORRECT SOLUTIONS ALREADY PASSED!!

The high and low pressures in a refrigerant system are separated by the : - Answer-COMPRESSOR & METERING DEVICE. The pressure at which the refrigerant changes state from a vapor to a liquid is the : - AnswerCONDENSING PRESSURE. A pressure gauge placed anywhere from the metering device to the compressor will read: - AnswerTHE LOW SIDE OR EVAPORATING PRESSURE. The most common refrigerants exist either in : - Answer-BOTH (A&B) A. SATUARATED VAPOR & B.SATURATED LIQUID STATE. In a operating system, you should have liquid and vapor in the : - Answer-EVAPORATOR & CONDENSER. The term refrigerant "conditions" refer to which of the following? - Answer-SATURATED, SUPERHEAT OR SUBCOOLED REFRIGERANT. The heat energy that causes a liquid refrigerant to change to a vapor at a constant saturation temperature for a given pressure is referred to as : - Answer-LATENT HEAT. The temperature/pressure chart is only good when the refrigerant is in the: - Answer-LIQUID AND VAPOR MIX. Super heat always refers to: - Answer-A VAPOR. Subcooling always refers to: - Answer-A LIQUID COOLED BELOW ITS SATURATION TEMPERATURE. The basic components of a refrigeration unit are: - Answer-COMPRESSOR, DISCHARGE LINE, CONDENSER, METERING DEVICE, RECEIVER, EVAPORATOR AND SUCTION LINE. In the first few passes of the condenser: - Answer-THE REFRIGERANT SHOULD BE DE-SUPERHEATED.One of the main functions of a condenser: - Answer-CHANGE THE REFRIGERANT VAPOR TO LIQUID. Subcooling can be defined as: - Answer-ANY SENSIBLE HEAT TAKEN AWAY FROM 100% SATURATED LIQUID. The component in the refrigeration system used to catch and prevent liquid from entering the compressor is called: - Answer-ACCUMULATOR. The greatest advantage of a TXV over capillary tube or fixed metering device is: - Answer-THE TXV CAN ADAPT TO THE LOAD VERY QUICKLY. The greatest need for "sub-cooling" the refrigerant is to: - Answer-PREVENT LIQUID LINE FLASH, THUS MAKING THE SYSTEM MUCH MORE EFFICIENT. The purpose for a liquid pressure amplification LPA is to: - Answer-HELP PREVENT FLASHING AND INCREASE SUB-COOLING. The refrigerant change in TXV remote bulb or power element must be: - Answer-IDENTICAL TO THE REFRIGERANT IN THE SYSTEM. The external equalizing tube on the TXV is used on: - Answer-LONG EVAPORATES HAVING A SIGNIFICANT PRESSURE DROP. The factory superheat settings for TXV's used with central air conditioning system should be: - Answer-ABOUT 10 DEGREES. The remote bulb of a TXV should be fastened tot the: - Answer-OUTLET OF EVAPORATOR The refrigerant passing through a filter drier on the high side of the system should be on what state? - Answer-LIQUID