R-410A Practice UPDATED ACTUAL Exam
Questions and CORRECT Answers
An advantage of ester-based oils such as polyester is? - CORRECT ANSWER - They have
a wax-free composition
While Refrigerant 410A is a near azeotropic refrigerant, it is still best when charging to remove
the R-410A as a _____.
from the storage cylinder. - CORRECT ANSWER - Liquid
After _ chemical manufacturers may still produce R-22 to service existing equipment, but not for
use in new equipment. - CORRECT ANSWER - January 1, 2010
Recovery tanks used for the storage of R-410A are specified as___? - CORRECT
ANSWER - DOT 4BA400 or 4BW400
The maximum safety-relief pressure for a disposable R-410A cylinder is___? - CORRECT
ANSWER - 800 psig
R-410A is not a typical non-azeotropic blend because: - CORRECT ANSWER - It is a
near azeotropic refrigerant.
While it has a 400 series refrigerant
number it behaves like a 500 series refrigerant.
It could be charged as either a liquid or vapor. (But liquid charging is recommended).
Answer: All of the above
, Since R-410A is a high-pressure refrigerant, the Storage Requirements are: - CORRECT
ANSWER - The storage temperature should not exceed 125°F.
It is important not to mix R-22 and R-410A refrigerants in the same container because: -
CORRECT ANSWER - the mixture may be impossible to reclaim.
Universal or ______ certification is required to
handle and purchase R-410A. - CORRECT ANSWER - Type 2
The evaporation temperature of R-410A at 120 psig is about: - CORRECT ANSWER - 40
degrees F°
R-410A systems may be topped off after a leak because: - CORRECT ANSWER - it
behaves like a pure compound
Split System AC units that use R-410A should be leak checked with: - CORRECT
ANSWER - pressurized nitrogen (with a small quantity of R-22 only if a trace gas for the
electronic detector is needed)
The temperature of a single compound at 100% saturated vapor with no superheat is: -
CORRECT ANSWER - equal to its saturation temperature for that pressure.
R-407C has: - CORRECT ANSWER - the ability to fractionate.
A recovery cylinder which is half full of recovered
R-410A at 80 degrees F, in the absence of non-condensables, will be pressurized to: - CORRECT
ANSWER - 237 psig
To change the evaporator on a system containing
Questions and CORRECT Answers
An advantage of ester-based oils such as polyester is? - CORRECT ANSWER - They have
a wax-free composition
While Refrigerant 410A is a near azeotropic refrigerant, it is still best when charging to remove
the R-410A as a _____.
from the storage cylinder. - CORRECT ANSWER - Liquid
After _ chemical manufacturers may still produce R-22 to service existing equipment, but not for
use in new equipment. - CORRECT ANSWER - January 1, 2010
Recovery tanks used for the storage of R-410A are specified as___? - CORRECT
ANSWER - DOT 4BA400 or 4BW400
The maximum safety-relief pressure for a disposable R-410A cylinder is___? - CORRECT
ANSWER - 800 psig
R-410A is not a typical non-azeotropic blend because: - CORRECT ANSWER - It is a
near azeotropic refrigerant.
While it has a 400 series refrigerant
number it behaves like a 500 series refrigerant.
It could be charged as either a liquid or vapor. (But liquid charging is recommended).
Answer: All of the above
, Since R-410A is a high-pressure refrigerant, the Storage Requirements are: - CORRECT
ANSWER - The storage temperature should not exceed 125°F.
It is important not to mix R-22 and R-410A refrigerants in the same container because: -
CORRECT ANSWER - the mixture may be impossible to reclaim.
Universal or ______ certification is required to
handle and purchase R-410A. - CORRECT ANSWER - Type 2
The evaporation temperature of R-410A at 120 psig is about: - CORRECT ANSWER - 40
degrees F°
R-410A systems may be topped off after a leak because: - CORRECT ANSWER - it
behaves like a pure compound
Split System AC units that use R-410A should be leak checked with: - CORRECT
ANSWER - pressurized nitrogen (with a small quantity of R-22 only if a trace gas for the
electronic detector is needed)
The temperature of a single compound at 100% saturated vapor with no superheat is: -
CORRECT ANSWER - equal to its saturation temperature for that pressure.
R-407C has: - CORRECT ANSWER - the ability to fractionate.
A recovery cylinder which is half full of recovered
R-410A at 80 degrees F, in the absence of non-condensables, will be pressurized to: - CORRECT
ANSWER - 237 psig
To change the evaporator on a system containing
