Refrigerant 410A Certification Questions
and Answers 100% Solved
-Suva 410a
-AZ-20
-Puron ✔️✔️R-410a is also known as?
0.3 ✔️✔️The temperature glide for R-410a is less than _____ degrees Fahrenheit over air
conditioning and refrigeration operating ranges.
-Can be irritating to the skin
-Is hydroscopic
-Has improved heat transfer characteristics over mineral oils ✔️✔️Polyol Ester (POE):
50 psig ✔️✔️The low pressure control on R-410a systems will open at:
Absolute discharge pressure divided by absolute suction pressure ✔️✔️Compression ratio is
calculated as:
40% to 70% higher ✔️✔️Both suction and discharge pressure of R-410a systems are _____
than R-22 systems.
Lower ✔️✔️Because of its higher vapor capacity, the discharge temperature of R-410a is
_____ than R-22.
610 psig plus or minus 10psig ✔️✔️R-410a systems use a high pressure switch that will open
at approximately:
, lose or gain ✔️✔️Subcooled liquid in the receiver may _____ subcooling, depending on
surrounding conditions.
800 psig ✔️✔️When installing a liquid line filter drier on a R-410a system, be certain that it has
a pressure rating of at least:
Smaller than that of a R-22 Metering device ✔️✔️The flow area of a R-410a metering device is:
It may separate (fractionate) into its component refrigerants ✔️✔️Which of the following
statements is true of R-407c
will not fractionate ✔️✔️A true azeotropic blend:
-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)
It should be transferred from cylinders as a liquid to avoid fractionation ✔️✔️When a blend is
zeotropic, or near azeotropic (NARM)
Cause the components to leak at uneven rates due to varying vapor pressures ✔️✔️Near-
azeotropic blend fractionation may;
None of the above ✔️✔️Blends that have fractionated, depending on the constituent make-
up, may become;
Should be charged in the liquid phase ✔️✔️To avoid fractionation, blended refrigerants:
and Answers 100% Solved
-Suva 410a
-AZ-20
-Puron ✔️✔️R-410a is also known as?
0.3 ✔️✔️The temperature glide for R-410a is less than _____ degrees Fahrenheit over air
conditioning and refrigeration operating ranges.
-Can be irritating to the skin
-Is hydroscopic
-Has improved heat transfer characteristics over mineral oils ✔️✔️Polyol Ester (POE):
50 psig ✔️✔️The low pressure control on R-410a systems will open at:
Absolute discharge pressure divided by absolute suction pressure ✔️✔️Compression ratio is
calculated as:
40% to 70% higher ✔️✔️Both suction and discharge pressure of R-410a systems are _____
than R-22 systems.
Lower ✔️✔️Because of its higher vapor capacity, the discharge temperature of R-410a is
_____ than R-22.
610 psig plus or minus 10psig ✔️✔️R-410a systems use a high pressure switch that will open
at approximately:
, lose or gain ✔️✔️Subcooled liquid in the receiver may _____ subcooling, depending on
surrounding conditions.
800 psig ✔️✔️When installing a liquid line filter drier on a R-410a system, be certain that it has
a pressure rating of at least:
Smaller than that of a R-22 Metering device ✔️✔️The flow area of a R-410a metering device is:
It may separate (fractionate) into its component refrigerants ✔️✔️Which of the following
statements is true of R-407c
will not fractionate ✔️✔️A true azeotropic blend:
-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)
It should be transferred from cylinders as a liquid to avoid fractionation ✔️✔️When a blend is
zeotropic, or near azeotropic (NARM)
Cause the components to leak at uneven rates due to varying vapor pressures ✔️✔️Near-
azeotropic blend fractionation may;
None of the above ✔️✔️Blends that have fractionated, depending on the constituent make-
up, may become;
Should be charged in the liquid phase ✔️✔️To avoid fractionation, blended refrigerants:
