2
F Gas Newest Exam with precise detailed answers
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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
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has been observed? - ✔✔The evaporator superheat is high with bubbles in the liquid line
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sight glass ||
The EC F Gas Regulations 517/2014 requires refrigeration systems containing > 50 and < 500
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of an HFC refrigerant without an automatic leak detector to be leak tested? - ✔✔6
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monthly
Which of the following TEV superheat settings is likely to cause refrigeration system
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hermetic compressor to run continuously and overheat? - ✔✔20K
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Under the F Gas Regulations when should a newly installed system be checked for
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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
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What pipe diameter is least likely to fail when carrying out the strength test using OFN? -
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✔✔1 inch ||
Which one of the following effects would result in an increase in system efficiency? - ✔✔A
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reduction in vapour specific volume || || || ||
The ODP of the refrigerant R22 is? - ✔✔0.05
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, 2
What would cause a reduction in the efficiency of a cooling plant? - ✔✔High pressure ratio
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Which one of the following would improve the energy efficiency of an air conditioning or
|| || || || || || || || || || || || || || ||
refrigeration system the most? - ✔✔Lowering the condensing temperature and raising the
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evaporating temperature ||
Why might a unit short cycle on low pressure control? - ✔✔Refrigerant loss
|| || || || || || || || || || || ||
What refrigerant is covered by the requirements of EC Regulations 517/2014? - ✔✔R404A
|| || || || || || || || || || || ||
What identifies that a system may have lost refrigerant? - ✔✔Bubbles in the sight glass
|| || || || || || || || || || || || || ||
The term indirect leak checking refers to? - ✔✔The calculation of the correct operating
|| || || || || || || || || || || || || ||
conditions by taking pressure and temperature readings
|| || || || || ||
To find a suspected refrigerant leak on a freezer room evaporator it's best to? - ✔✔Leak
|| || || || || || || || || || || || || || || ||
test the evaporator with the unit in shut down
|| || || || || || || ||
If the fins on the evaporator become blocked what is the result on the suction vapour? -
|| || || || || || || || || || || || || || || || ||
✔✔Pressure and temperature fall || || ||
To calculate the system compression ratio? - ✔✔Divide discharge pressure by suction
|| || || || || || || || || || || ||
pressure (gauge) ||
What would make ice form around a TEV and possibly cause the pipe work damage? -
|| || || || || || || || || || || || || || || ||
✔✔Short of refrigerant || ||
F Gas Newest Exam with precise detailed answers
|| || || || || || ||
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 || || || ||
The ODP of the refrigerant R22 is? - ✔✔0.05
|| || || || || || || ||
, 2
What would cause a reduction in the efficiency of a cooling plant? - ✔✔High pressure ratio
|| || || || || || || || || || || || || || ||
Which one of the following would improve the energy efficiency of an air conditioning or
|| || || || || || || || || || || || || || ||
refrigeration system the most? - ✔✔Lowering the condensing temperature and raising the
|| || || || || || || || || || || ||
evaporating temperature ||
Why might a unit short cycle on low pressure control? - ✔✔Refrigerant loss
|| || || || || || || || || || || ||
What refrigerant is covered by the requirements of EC Regulations 517/2014? - ✔✔R404A
|| || || || || || || || || || || ||
What identifies that a system may have lost refrigerant? - ✔✔Bubbles in the sight glass
|| || || || || || || || || || || || || ||
The term indirect leak checking refers to? - ✔✔The calculation of the correct operating
|| || || || || || || || || || || || || ||
conditions by taking pressure and temperature readings
|| || || || || ||
To find a suspected refrigerant leak on a freezer room evaporator it's best to? - ✔✔Leak
|| || || || || || || || || || || || || || || ||
test the evaporator with the unit in shut down
|| || || || || || || ||
If the fins on the evaporator become blocked what is the result on the suction vapour? -
|| || || || || || || || || || || || || || || || ||
✔✔Pressure and temperature fall || || ||
To calculate the system compression ratio? - ✔✔Divide discharge pressure by suction
|| || || || || || || || || || || ||
pressure (gauge) ||
What would make ice form around a TEV and possibly cause the pipe work damage? -
|| || || || || || || || || || || || || || || ||
✔✔Short of refrigerant || ||
