Air conditioning Certification practice test 100% Updated!

What is the movement of heat through space called? - ANSWERRadiation A refrigerant release heat when - ANSWERIt condenses Why is it desirable for refrigerant in the suction line to be slightly superheated? - ANSWERTo 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? - ANSWER121 psig 14.7 psia( pouds per square inch absolute) is - ANSWERApproximately 0 PSIG What is the main fuction of an air condition condenser? - ANSWERTo 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? - ANSWER124 psig (the pressure should not change entering or leaving the condenser) Which of the following CANNOT be used as a low ambient temperature control? - ANSWERCrankcase 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 - ANSWERApproximately 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. - ANSWER10 degrees F What does a temperature differential across a filter-drier indicate? - ANSWER