REFRIGERANT 410A CERTIFICATION
EXAM QUESTIONS AND ANSWERS 2026
VERIFIED.
R-410a is also known as? - ANS -Suva 410a
-AZ-20
-Puron
The temperature glide for R-410a is less than _____ degrees Fahrenheit over air conditioning
and refrigeration operating ranges. - ANS 0.3
Polyol Ester (POE): - ANS -Can be irritating to the skin
-Is hydroscopic
-Has improved heat transfer characteristics over mineral oils
The low pressure control on R-410a systems will open at: - ANS 50 psig
Compression ratio is calculated as: - ANS Absolute discharge pressure divided by absolute
suction pressure
Both suction and discharge pressure of R-410a systems are _____ than R-22 systems. -
ANS 40% to 70% higher
@2026/2027 ALLRIGHTS RESERVED.
, Because of its higher vapor capacity, the discharge temperature of R-410a is _____ than R-22. -
ANS Lower
R-410a systems use a high pressure switch that will open at approximately: - ANS 610 psig
plus or minus 10psig
Subcooled liquid in the receiver may _____ subcooling, depending on surrounding conditions. -
ANS lose or gain
When installing a liquid line filter drier on a R-410a system, be certain that it has a pressure
rating of at least: - ANS 800 psig
The flow area of a R-410a metering device is: - ANS Smaller than that of a R-22 Metering
device
Which of the following statements is true of R-407c - ANS It may separate (fractionate) into
its component refrigerants
A true azeotropic blend: - ANS will not fractionate
When a blend is zeotropic, or near-azeotropic (NARM) - ANS -Leaks may cause a change in
composition of the blend
-It will have temperature glide
-It can fractionate
When a blend is zeotropic, or near azeotropic (NARM) - ANS It should be transferred from
cylinders as a liquid to avoid fractionation
Near-azeotropic blend fractionation may; - ANS Cause the components to leak at uneven
rates due to varying vapor pressures
@2026/2027 ALLRIGHTS RESERVED.
EXAM QUESTIONS AND ANSWERS 2026
VERIFIED.
R-410a is also known as? - ANS -Suva 410a
-AZ-20
-Puron
The temperature glide for R-410a is less than _____ degrees Fahrenheit over air conditioning
and refrigeration operating ranges. - ANS 0.3
Polyol Ester (POE): - ANS -Can be irritating to the skin
-Is hydroscopic
-Has improved heat transfer characteristics over mineral oils
The low pressure control on R-410a systems will open at: - ANS 50 psig
Compression ratio is calculated as: - ANS Absolute discharge pressure divided by absolute
suction pressure
Both suction and discharge pressure of R-410a systems are _____ than R-22 systems. -
ANS 40% to 70% higher
@2026/2027 ALLRIGHTS RESERVED.
, Because of its higher vapor capacity, the discharge temperature of R-410a is _____ than R-22. -
ANS Lower
R-410a systems use a high pressure switch that will open at approximately: - ANS 610 psig
plus or minus 10psig
Subcooled liquid in the receiver may _____ subcooling, depending on surrounding conditions. -
ANS lose or gain
When installing a liquid line filter drier on a R-410a system, be certain that it has a pressure
rating of at least: - ANS 800 psig
The flow area of a R-410a metering device is: - ANS Smaller than that of a R-22 Metering
device
Which of the following statements is true of R-407c - ANS It may separate (fractionate) into
its component refrigerants
A true azeotropic blend: - ANS will not fractionate
When a blend is zeotropic, or near-azeotropic (NARM) - ANS -Leaks may cause a change in
composition of the blend
-It will have temperature glide
-It can fractionate
When a blend is zeotropic, or near azeotropic (NARM) - ANS It should be transferred from
cylinders as a liquid to avoid fractionation
Near-azeotropic blend fractionation may; - ANS Cause the components to leak at uneven
rates due to varying vapor pressures
@2026/2027 ALLRIGHTS RESERVED.
