1
Air conditioning Certification
practice test Questions and Correct
Answers
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
Pretest - Stuvia US
, 2
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
What does a temperature differential across a filter-
drier indicate? Answer: Restricted filter-drier
Pretest - Stuvia US
Air conditioning Certification
practice test Questions and Correct
Answers
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
Pretest - Stuvia US
, 2
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
What does a temperature differential across a filter-
drier indicate? Answer: Restricted filter-drier
Pretest - Stuvia US
