F gas exam part 2 with answers
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Which one of the following describes enthalpy - CORRECT
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ANSWERS ✔✔Heat content per unit mass |\ |\ |\ |\ |\
The function of an evaporative condenser is to - CORRECT
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ANSWERS ✔✔reject latent heat to change vapour to
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liquid
Subcooling is established when: - CORRECT ANSWERS |\ |\ |\ |\ |\ |\ |\
✔✔refrigerant liquid is cooled below its boiling point |\ |\ |\ |\ |\ |\ |\
The most efficient operating temperatures for a chill
|\ |\ |\ |\ |\ |\ |\ |\
coldroom designed to maintain a space temperature of
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+2°C with 'air on' to the condenser at 32°C are: -
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CORRECT ANSWERS ✔✔evaporating at -8ºC and |\ |\ |\ |\ |\ |\
condensing at + 48ºC |\ |\ |\
Which one of the following refrigerants is most likely to
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suffer from changes in its composition after leakage from
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a static system? a)R22 b)R134a c)R245fa d)R407C -
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CORRECT ANSWERS ✔✔R407C |\ |\
, Which of the following refrigerant conditions will provide a
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clear liquid line sight glass? - CORRECT ANSWERS
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✔✔Subcooled liquid |\
Which one of the following environmental issues is
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addressed by the Kyoto Protocol? - CORRECT ANSWERS |\ |\ |\ |\ |\ |\ |\ |\
✔✔Climate change |\
Which one of the following refrigerants has least impact
|\ |\ |\ |\ |\ |\ |\ |\ |\
on direct global warming? - CORRECT ANSWERS ✔✔R717
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The Energy Efficiency Ratio of a heat pump system is
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found from: - CORRECT ANSWERS ✔✔Heating capacity
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Total system input power |\ |\ |\
As the difference between condensing temperature and
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evaporating temperature decreases - CORRECT ANSWERS |\ |\ |\ |\ |\
✔✔Work done decreases and discharge temperature
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decreases
Which of the following saturation temperatures satisfies
|\ |\ |\ |\ |\ |\ |\
the BS EN 378 requirement for pressure testing the high
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
side of cooling systems fitted with air cooled condensers?
|\ |\ |\ |\ |\ |\ |\ |\
- CORRECT ANSWERS ✔✔55ºC
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|\ |\ |\ |\ |\ |\
Which one of the following describes enthalpy - CORRECT
|\ |\ |\ |\ |\ |\ |\ |\ |\
ANSWERS ✔✔Heat content per unit mass |\ |\ |\ |\ |\
The function of an evaporative condenser is to - CORRECT
|\ |\ |\ |\ |\ |\ |\ |\ |\
ANSWERS ✔✔reject latent heat to change vapour to
|\ |\ |\ |\ |\ |\ |\ |\ |\
liquid
Subcooling is established when: - CORRECT ANSWERS |\ |\ |\ |\ |\ |\ |\
✔✔refrigerant liquid is cooled below its boiling point |\ |\ |\ |\ |\ |\ |\
The most efficient operating temperatures for a chill
|\ |\ |\ |\ |\ |\ |\ |\
coldroom designed to maintain a space temperature of
|\ |\ |\ |\ |\ |\ |\ |\
+2°C with 'air on' to the condenser at 32°C are: -
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
CORRECT ANSWERS ✔✔evaporating at -8ºC and |\ |\ |\ |\ |\ |\
condensing at + 48ºC |\ |\ |\
Which one of the following refrigerants is most likely to
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
suffer from changes in its composition after leakage from
|\ |\ |\ |\ |\ |\ |\ |\ |\
a static system? a)R22 b)R134a c)R245fa d)R407C -
|\ |\ |\ |\ |\ |\ |\ |\
CORRECT ANSWERS ✔✔R407C |\ |\
, Which of the following refrigerant conditions will provide a
|\ |\ |\ |\ |\ |\ |\ |\
clear liquid line sight glass? - CORRECT ANSWERS
|\ |\ |\ |\ |\ |\ |\ |\ |\
✔✔Subcooled liquid |\
Which one of the following environmental issues is
|\ |\ |\ |\ |\ |\ |\ |\
addressed by the Kyoto Protocol? - CORRECT ANSWERS |\ |\ |\ |\ |\ |\ |\ |\
✔✔Climate change |\
Which one of the following refrigerants has least impact
|\ |\ |\ |\ |\ |\ |\ |\ |\
on direct global warming? - CORRECT ANSWERS ✔✔R717
|\ |\ |\ |\ |\ |\ |\
The Energy Efficiency Ratio of a heat pump system is
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
found from: - CORRECT ANSWERS ✔✔Heating capacity
|\ |\ |\ |\ |\ |\ |\
Total system input power |\ |\ |\
As the difference between condensing temperature and
|\ |\ |\ |\ |\ |\ |\
evaporating temperature decreases - CORRECT ANSWERS |\ |\ |\ |\ |\
✔✔Work done decreases and discharge temperature
|\ |\ |\ |\ |\ |\ |\
decreases
Which of the following saturation temperatures satisfies
|\ |\ |\ |\ |\ |\ |\
the BS EN 378 requirement for pressure testing the high
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
side of cooling systems fitted with air cooled condensers?
|\ |\ |\ |\ |\ |\ |\ |\
- CORRECT ANSWERS ✔✔55ºC
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