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ESCO Air Conditioning Certification
Practice Test Exam Questions & Answers
| Latest Already Graded A+ UPDATE
2025|2026!! Air conditioning
Certification practice test
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
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? -
, 2
(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
Which of the following symptoms would be indicative of an oil logged
evaporator? - (ANSWER)Reduce heat transfer through the walls of the coil
When using an electronic leak detecto, the sensor probe - (ANSWER)should be
moved at approximately 1 inch per second
Before a vapor / compression system is opened for service - (ANSWER)the
refrigerant must be recovered using approved equipment
ESCO Air Conditioning Certification
Practice Test Exam Questions & Answers
| Latest Already Graded A+ UPDATE
2025|2026!! Air conditioning
Certification practice test
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
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? -
, 2
(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
Which of the following symptoms would be indicative of an oil logged
evaporator? - (ANSWER)Reduce heat transfer through the walls of the coil
When using an electronic leak detecto, the sensor probe - (ANSWER)should be
moved at approximately 1 inch per second
Before a vapor / compression system is opened for service - (ANSWER)the
refrigerant must be recovered using approved equipment
