Refrigeration and Air Conditioning The refrigerant for a refrigerator should have Low latent heat High latent heat High total heat High sensible heat Low latent heat High latent heat High total heat High sensible heat ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning When the lower temperature of a refrigerating machine is fixed, then the coefficient of performance can be improved by Raising the higher temperature Lowering the higher temperature Operating the machine at higher speeds Operating the machine at lower speeds Raising the higher temperature Lowering the higher temperature Operating the machine at higher speeds Operating the machine at lower speeds ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning In case of sensible cooling of air, the coil efficiency is given by 1/ B.P.F. 1 - B.P.F. P.F. - 1 1 + B.P.F. 1/ B.P.F. 1 - B.P.F. P.F. - 1 1 + B.P.F. ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning Short horizontal lines on pressure-enthalpy chart show Constant total heat lines Constant temperature lines Constant pressure lines Constant entropy lines Constant total heat lines Constant temperature lines Constant pressure lines Constant entropy lines ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning A good refrigerant should have High operating pressures and low freezing point High latent heat of vaporisation and low freezing point High specific volume and high latent heat of vaporisation Low C.O.P. and low freezing point High operating pressures and low freezing point High latent heat of vaporisation and low freezing point High specific volume and high latent heat of vaporisation Low C.O.P. and low freezing point ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning The C.O.P. of a refrigeration cycle with lowering of condenser temperature, keeping the evaporator temperature constant, will Remain unaffected Decrease Increase May increase or decrease depending on the type of refrigerant used Remain unaffected Decrease Increase May increase or decrease depending on the type of refrigerant used ANSWER DOWNLOAD EXAMIANS APP
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