R-410A Test Exam Questions and
Answers Graded A+
Because of its higher vapor heat capacity, the discharge temperature of R-410A is
____ than R-22.
A. Higher
B. Lower
C. The same
D. None of the above - Correct answer-B. Lower
R-410A is also known as:
A. Suva 410A
B. AZ-20
C. Puron
D. All the above - Correct answer-D. All the above
Both suction and discharge pressures of R410a systems are _____ than R22
systems.
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,A. The same
B. 40% to 70% higher
C. 60% lower
D. 10% to 30% higher - Correct answer-B. 40% to 70% higher
The temperature glide for R-410A is less than ____ degrees Fahrenheit over air
conditioning and refrigerating operating ranges.
A. 0.3
B. 0.9
C. 1.0
D. 1.5 - Correct answer-A. 0.3
Compression ratio is calculated as:
A. Absolute suction pressure divided by absolute discharge pressure
B. Discharge pressure divided by suction pressure
C. Absolute discharge pressure divided by absolute suction pressure
D. Suction pressure divided by discharge pressure - Correct answer-C. Absolute
discharge pressure divided by absolute suction pressure
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, Polyol Ester (POE):
A. Can be irritating to the skin
B. Is hygroscopic
C. Has improved heat transfer characteristics over mineral oil
D. All the above - Correct answer-D. All the above
The low pressure control on R-410A systems will open at:
A. 50 psig
B. 30 psig
C. 70 psig
D. 90 psig - Correct answer-A. 50 psig
When a blend is zeotropic, or near-azeotropic (NARM):
A. Leaks may cause a change in the composition of the blend
B. It will have temperature glide
C. It can fractionate
D. All the above - Correct answer-D. All the above
R-410A systems use a high pressure switch that will open at approximately:
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Answers Graded A+
Because of its higher vapor heat capacity, the discharge temperature of R-410A is
____ than R-22.
A. Higher
B. Lower
C. The same
D. None of the above - Correct answer-B. Lower
R-410A is also known as:
A. Suva 410A
B. AZ-20
C. Puron
D. All the above - Correct answer-D. All the above
Both suction and discharge pressures of R410a systems are _____ than R22
systems.
©COPYRIGHT 2025, ALL RIGHTS RESERVED 1
,A. The same
B. 40% to 70% higher
C. 60% lower
D. 10% to 30% higher - Correct answer-B. 40% to 70% higher
The temperature glide for R-410A is less than ____ degrees Fahrenheit over air
conditioning and refrigerating operating ranges.
A. 0.3
B. 0.9
C. 1.0
D. 1.5 - Correct answer-A. 0.3
Compression ratio is calculated as:
A. Absolute suction pressure divided by absolute discharge pressure
B. Discharge pressure divided by suction pressure
C. Absolute discharge pressure divided by absolute suction pressure
D. Suction pressure divided by discharge pressure - Correct answer-C. Absolute
discharge pressure divided by absolute suction pressure
©COPYRIGHT 2025, ALL RIGHTS RESERVED 2
, Polyol Ester (POE):
A. Can be irritating to the skin
B. Is hygroscopic
C. Has improved heat transfer characteristics over mineral oil
D. All the above - Correct answer-D. All the above
The low pressure control on R-410A systems will open at:
A. 50 psig
B. 30 psig
C. 70 psig
D. 90 psig - Correct answer-A. 50 psig
When a blend is zeotropic, or near-azeotropic (NARM):
A. Leaks may cause a change in the composition of the blend
B. It will have temperature glide
C. It can fractionate
D. All the above - Correct answer-D. All the above
R-410A systems use a high pressure switch that will open at approximately:
©COPYRIGHT 2025, ALL RIGHTS RESERVED 3
