Air Conditioning Certification Exam (Exam
Code A-02) 100% CORRECT AND UPDATED
solutions 2025!
The temperature at which moisture will start to condense from the air is
called; --- CORRECT ANSWER ---dew point temperature.
A compound pressure guage measures; --- CORRECT ANSWER ---pressure
and vacuum.
A mechanical shaft seal is necessary on a; --- CORRECT ANSWER ---open
drive compressor.
Liquid slugging is; --- CORRECT ANSWER ---liquid refrigerant in the
compressor clearance space.
The clearance space in a reciprocating compressor; --- CORRECT ANSWER -
--has an effect on compressor capacity.
Which of the following will cause a change in compressor capacity?
a) suction pressure.
,b) discharge pressure.
c) refrigerant vapor density.
d) all of the above. --- CORRECT ANSWER ---d) all of the above
The main function of the condenser is to; --- CORRECT ANSWER ---remove
heat from the refrigerant.
Refrigerant R12 vapor enters the condenser at 116.9 psig, 100 F. It leaves
the condenser at 80 F. Its pressure will be approximately; --- CORRECT
ANSWER ---84.1 psig.
There are three basic types of condensers, the air cooled, the water cooled
and the __________cooled. --- CORRECT ANSWER ---evaporative.
10 lbs. of refrigerant pass through a water cooled condenser and gives up 20
Btu's of heat per lbs. At the same time, 10 lbs. of water passes through with
an entering temperature of 80 F. The temperature of the water leaving the
condenser is; --- CORRECT ANSWER ---100 F
The heat removed from the refrigerant by the condenser is; --- CORRECT
ANSWER ---both sensible and latent heat.
, A condenser that is used in a low ambient temperature conditions must have
a method of maintaining a workable head pressure. This can be
accomplished by;
a) fan cycling
b) air shutters or dampers
c) condenser flooding
d) any of the above --- CORRECT ANSWER ---d) all of the above
When testing the efficiency of an air cooled condenser, the refrigerant
condensing temperature should be no more than___________ higher than
the entering air temperature. --- CORRECT ANSWER ---approximately 30 F.
When testing the efficiency of an water cooled condenser, the refrigerant
condensing temperature should be no more than___________ higher than
the leaving water temperature. --- CORRECT ANSWER ---approximately 10
F.
The first function a condenser must perform is to ___________the
refrigerant before condensing can occur. --- CORRECT ANSWER ---de-
superheat.
A thermostatic expansion valve is designed to maintain; --- CORRECT
ANSWER ---constant evaporator superheat.
Code A-02) 100% CORRECT AND UPDATED
solutions 2025!
The temperature at which moisture will start to condense from the air is
called; --- CORRECT ANSWER ---dew point temperature.
A compound pressure guage measures; --- CORRECT ANSWER ---pressure
and vacuum.
A mechanical shaft seal is necessary on a; --- CORRECT ANSWER ---open
drive compressor.
Liquid slugging is; --- CORRECT ANSWER ---liquid refrigerant in the
compressor clearance space.
The clearance space in a reciprocating compressor; --- CORRECT ANSWER -
--has an effect on compressor capacity.
Which of the following will cause a change in compressor capacity?
a) suction pressure.
,b) discharge pressure.
c) refrigerant vapor density.
d) all of the above. --- CORRECT ANSWER ---d) all of the above
The main function of the condenser is to; --- CORRECT ANSWER ---remove
heat from the refrigerant.
Refrigerant R12 vapor enters the condenser at 116.9 psig, 100 F. It leaves
the condenser at 80 F. Its pressure will be approximately; --- CORRECT
ANSWER ---84.1 psig.
There are three basic types of condensers, the air cooled, the water cooled
and the __________cooled. --- CORRECT ANSWER ---evaporative.
10 lbs. of refrigerant pass through a water cooled condenser and gives up 20
Btu's of heat per lbs. At the same time, 10 lbs. of water passes through with
an entering temperature of 80 F. The temperature of the water leaving the
condenser is; --- CORRECT ANSWER ---100 F
The heat removed from the refrigerant by the condenser is; --- CORRECT
ANSWER ---both sensible and latent heat.
, A condenser that is used in a low ambient temperature conditions must have
a method of maintaining a workable head pressure. This can be
accomplished by;
a) fan cycling
b) air shutters or dampers
c) condenser flooding
d) any of the above --- CORRECT ANSWER ---d) all of the above
When testing the efficiency of an air cooled condenser, the refrigerant
condensing temperature should be no more than___________ higher than
the entering air temperature. --- CORRECT ANSWER ---approximately 30 F.
When testing the efficiency of an water cooled condenser, the refrigerant
condensing temperature should be no more than___________ higher than
the leaving water temperature. --- CORRECT ANSWER ---approximately 10
F.
The first function a condenser must perform is to ___________the
refrigerant before condensing can occur. --- CORRECT ANSWER ---de-
superheat.
A thermostatic expansion valve is designed to maintain; --- CORRECT
ANSWER ---constant evaporator superheat.
