HVAC-R TEST: BASIC SCIENCE & A2L'S
(2025) QUESTIONS WITH 100%
CORRECT ANSWERS!!
, it is no longer considered zeotropic fractionation can occur
Don't know?
2 of 60
Term
When calculating the superheat of a system charged with a
zeotropic or near-azeotropic refrigerant blend, which of the
following values should be used?
Give this one a try later!
Bubble point Relative humidity
Dew point Saturation point
Don't know?
3 of 60
Term
What is refrigeration as it pertains to air conditioning?
Give this one a try later!
, The transfer of cold air to a warmer The conversion of heat into
place electrical energy
The process of transferring
The process of storing heat for later heat from a place it is not
use wanted to a place where we
don't care.
Don't know?
4 of 60
Term
Which of the following is classified as an A2L refrigerant?
Give this one a try later!
R-290 R-410A
R-32 R-134a
Don't know?
, 5 of 60
Term
Prior to beginning work on a jobsite where equipment that is
charged with a flammable refrigerant will be used;
Give this one a try later!
the jobsite should be
evaluated for safety hazards
the jobsite should be checked for
such as possible ignition
electrical grounding issues
sources or the presence of
flammable vapors.
the jobsite should be assessed for the jobsite should be inspected for
temperature and humidity levels noise levels and air quality
Don't know?
6 of 60
Term
Refillable cylinders are typically certified for how many years of use
before they must be hydrostatically tested?
Give this one a try later!
3 years 5 years
(2025) QUESTIONS WITH 100%
CORRECT ANSWERS!!
, it is no longer considered zeotropic fractionation can occur
Don't know?
2 of 60
Term
When calculating the superheat of a system charged with a
zeotropic or near-azeotropic refrigerant blend, which of the
following values should be used?
Give this one a try later!
Bubble point Relative humidity
Dew point Saturation point
Don't know?
3 of 60
Term
What is refrigeration as it pertains to air conditioning?
Give this one a try later!
, The transfer of cold air to a warmer The conversion of heat into
place electrical energy
The process of transferring
The process of storing heat for later heat from a place it is not
use wanted to a place where we
don't care.
Don't know?
4 of 60
Term
Which of the following is classified as an A2L refrigerant?
Give this one a try later!
R-290 R-410A
R-32 R-134a
Don't know?
, 5 of 60
Term
Prior to beginning work on a jobsite where equipment that is
charged with a flammable refrigerant will be used;
Give this one a try later!
the jobsite should be
evaluated for safety hazards
the jobsite should be checked for
such as possible ignition
electrical grounding issues
sources or the presence of
flammable vapors.
the jobsite should be assessed for the jobsite should be inspected for
temperature and humidity levels noise levels and air quality
Don't know?
6 of 60
Term
Refillable cylinders are typically certified for how many years of use
before they must be hydrostatically tested?
Give this one a try later!
3 years 5 years
