Air conditioning Certification practice test 100% CORRECT AND UPDATED!

What is the movement of heat through space called? -ANSWER Radiation A refrigerant release heat when -ANSWER It condenses Why is it desirable for refrigerant in the suction line to be slightly superheated? -ANSWER To insure liquid refrigerant does not enter the compressor A 30 pound cylinder of reclaimed R-22 refrigerant has been stored over night at 70 degrees F. What should be the approximate pressure in the cylinder? -ANSWER 121 psig 14.7 psia( pouds per square inch absolute) is -ANSWER Approximately 0 PSIG What is the main fuction of an air condition condenser? -ANSWER To remove heat from the refrigerant Refrigerant R-134a vapor enters the condenser at 124 psig, 100 degrees F. It leaves the condenser at 80 degreesF. What will be the approximate pressure? -ANSWER 124 psig (the pressure should not change entering or leaving the condenser) Which of the following CANNOT be used as a low ambient temperature control? -ANSWER Crankcase regulating valve When testing the efficiency of a (10 seer are lower) air cooled condenser, the refrigerant condensing temperature should be no more than_______ higher than the entering air temperature -ANSWER Approximately 30 degrees F When testing the efficiency of a water cooled condenser, the refrigerant condensing temperature should be no more _____ higher than the leaving water temperature. -ANSWER 10 degrees F