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AIR CONDITIONING CERTIFICATION EXAM
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AIR CONDITIONING CERTIFICATION EXAM
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AIR CONDITIONING CERTIFICATION EXAMA faulty condenser fan motor on an air conditioning system will cause these
symptoms..... - Answers-High suction pressure and high discharge pressure
When connecting copper to steel the recommended brazing filler alloy is a... - Answers-
45 percent silver alloy
A partially iced over evaporator can be caused by... - Answers-An undercharge
Heat added to the refrigerant in vapor state after the evaporation process is called.... -
Answers-Superheat
Why must refrigerant in the suction line be slightly warmer than the saturation
temperature? - Answers-Prevent liquid slugging of the compressor
Heat which causes a change of temperature of substance is called.... - Answers-
Sensible heat
The thermostatic expansion valve has three operating pressures.... - Answers-
Evaporator pressure, spring pressure, and sensor bulb pressure
What is the maximum operating pressure setting for an acetylene torch? - Answers-15
psig
Heat added to a substance without a rise in temperature; (example: liquid refrigerant to
gas) this process is called? - Answers-Latent heat of vaporization
An automatic expansion valve is best suited.... - Answers-When the load remains fairly
constant
If the cut-off plate is removed from a blower assembly, how would this effect blower
performance? - Answers-It would reduce air flow
When using an electronic leak detector, the sensor probe.... - Answers-Should be
moved approximately 1 inch every two seconds
A thermostatic expansion valve is designed to maintain... - Answers-Constant
evaporator superheat
A refrigerant gives up heat when... - Answers-It condenses
10 lbs of refrigerant passing through a water cooled condenser will lose 20 Btu's of heat
per lb. If 10 lb of water passes through the condenser with an entering temperature of
80 degrees F. The temperature of the water leaving the condenser is..... - Answers-100
degrees F
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