Air Conditioning Certification Exam
2026 latest update
A faulty condenser fan motor on an air conditioning system will cause these
symptoms..... - correct answerHigh suction pressure and high discharge pressure
When connecting copper to steel the recommended brazing filler alloy is a... - correct
answer45 percent silver alloy
A partially iced over evaporator can be caused by... - correct answerAn
undercharge
Heat added to the refrigerant in vapor state after the evaporation process is called.... -
correct answerSuperheat
Why must refrigerant in the suction line be slightly warmer than the saturation
temperature? - correct answerPrevent liquid slugging of the compressor
Heat which causes a change of temperature of substance is called.... - correct
answerSensible heat
The thermostatic expansion valve has three operating pressures.... - correct
answerEvaporator pressure, spring pressure, and sensor bulb pressure
What is the maximum operating pressure setting for an acetylene torch? - correct
answer15 psig
Heat added to a substance without a rise in temperature; (example: liquid refrigerant to
gas) this process is called? - correct answerLatent heat of vaporization
An automatic expansion valve is best suited.... - correct answerWhen the load
remains fairly constant
If the cut-off plate is removed from a blower assembly, how would this effect blower
performance? - correct answerIt would reduce air flow
When using an electronic leak detector, the sensor probe.... - correct answerShould
be moved approximately 1 inch every two seconds
A thermostatic expansion valve is designed to maintain... - correct answerConstant
evaporator superheat
2026 latest update
A faulty condenser fan motor on an air conditioning system will cause these
symptoms..... - correct answerHigh suction pressure and high discharge pressure
When connecting copper to steel the recommended brazing filler alloy is a... - correct
answer45 percent silver alloy
A partially iced over evaporator can be caused by... - correct answerAn
undercharge
Heat added to the refrigerant in vapor state after the evaporation process is called.... -
correct answerSuperheat
Why must refrigerant in the suction line be slightly warmer than the saturation
temperature? - correct answerPrevent liquid slugging of the compressor
Heat which causes a change of temperature of substance is called.... - correct
answerSensible heat
The thermostatic expansion valve has three operating pressures.... - correct
answerEvaporator pressure, spring pressure, and sensor bulb pressure
What is the maximum operating pressure setting for an acetylene torch? - correct
answer15 psig
Heat added to a substance without a rise in temperature; (example: liquid refrigerant to
gas) this process is called? - correct answerLatent heat of vaporization
An automatic expansion valve is best suited.... - correct answerWhen the load
remains fairly constant
If the cut-off plate is removed from a blower assembly, how would this effect blower
performance? - correct answerIt would reduce air flow
When using an electronic leak detector, the sensor probe.... - correct answerShould
be moved approximately 1 inch every two seconds
A thermostatic expansion valve is designed to maintain... - correct answerConstant
evaporator superheat
