F Gas Exam Questions and Correct
Answers| Updated
The condition of the refrigerant entering the expansion device is?
High pressure sub cooled liquid
The indications of a refrigerant leak on a refrigeration system is most likely if the
following has been observed?
The evaporator superheat is high with bubbles in the liquid line sight glass
The EC F Gas Regulations 517/2014 requires refrigeration systems containing > 50
and < 500 of an HFC refrigerant without an automatic leak detector to be leak
tested?
6 monthly
, Which of the following TEV superheat settings is likely to cause refrigeration
system hermetic compressor to run continuously and overheat?
20K
Under the F Gas Regulations when should a newly installed system be checked for
refrigeration leakage?
Immediately after being put into service
The residual flux that is left on the outside of a brazed joint must be removed
because?
The flux absorbs water from the air and corrodes the pipework
What pipe diameter is least likely to fail when carrying out the strength test using
OFN?
1 inch
Which one of the following effects would result in an increase in system efficiency?
A reduction in vapour specific volume
Answers| Updated
The condition of the refrigerant entering the expansion device is?
High pressure sub cooled liquid
The indications of a refrigerant leak on a refrigeration system is most likely if the
following has been observed?
The evaporator superheat is high with bubbles in the liquid line sight glass
The EC F Gas Regulations 517/2014 requires refrigeration systems containing > 50
and < 500 of an HFC refrigerant without an automatic leak detector to be leak
tested?
6 monthly
, Which of the following TEV superheat settings is likely to cause refrigeration
system hermetic compressor to run continuously and overheat?
20K
Under the F Gas Regulations when should a newly installed system be checked for
refrigeration leakage?
Immediately after being put into service
The residual flux that is left on the outside of a brazed joint must be removed
because?
The flux absorbs water from the air and corrodes the pipework
What pipe diameter is least likely to fail when carrying out the strength test using
OFN?
1 inch
Which one of the following effects would result in an increase in system efficiency?
A reduction in vapour specific volume
