Refrigeration and Air Conditioning Environmental protection agencies advice against the use of chlorofluorocarbon refrigerants since These react with plants and cause greenhouse effect These react with water vapour and cause acid rain These react with ozone layer These react with oxygen and cause its depletion These react with plants and cause greenhouse effect These react with water vapour and cause acid rain These react with ozone layer These react with oxygen and cause its depletion ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning Most thermostatic expansion valves are set for a superheat of 10°C 5°C 20°C 15°C 10°C 5°C 20°C 15°C ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning The desirable property of a refrigerant is All of these High latent heat of vaporisation Low boiling point High critical temperature All of these High latent heat of vaporisation Low boiling point High critical temperature ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning Formation of frost on evaporator in refrigerator Increases heat transfer rate Results in loss of heat due to poor heat transfer Can be avoided by proper design Is immaterial Increases heat transfer rate Results in loss of heat due to poor heat transfer Can be avoided by proper design Is immaterial ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning Efficiency of a Carnot engine is given as 80%. If the cycle direction be reversed, what will be the value of C.O.P. of reversed Carnot Cycle? 0.5 0.8 0.25 1.25 0.5 0.8 0.25 1.25 ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning During heating and dehumidification process, dry bulb temperature Decreases Remains constant Increases None of these Decreases Remains constant Increases None of these ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS