Refrigeration and Air Conditioning Formation of frost on evaporator in refrigerator Can be avoided by proper design Results in loss of heat due to poor heat transfer Increases heat transfer rate Is immaterial Can be avoided by proper design Results in loss of heat due to poor heat transfer Increases heat transfer rate Is immaterial ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning The wet bulb temperature during sensible heating of air Remains constant Decreases Increases None of these Remains constant Decreases Increases None of these ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning Ammonia absorption refrigeration cycle requires Maximum work input Zero work input Nearly same work input as for vapour compression cycle Very little work input Maximum work input Zero work input Nearly same work input as for vapour compression cycle Very little work input ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning R-12 is generally preferred over R-22 in deep freezers since All of these It is miscible with oil over large range of temperatures It has low operating pressures It gives higher coefficient of performance All of these It is miscible with oil over large range of temperatures It has low operating pressures It gives higher coefficient of performance ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning During sensible cooling of air, specific humidity Decreases Remains constant None of the listed here Increases Decreases Remains constant None of the listed here Increases ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning The C.O.P. of a refrigerator working on a reversed Carnot cycle is (where T₁ = Lowest absolute temperature, and T₂ = Highest absolute temperature) T₁ / (T₂ - T₁) T₂/ (T₂ - T₁) (T₂ - T₁)/T₁ (T₁ - T₂)/T₁ T₁ / (T₂ - T₁) T₂/ (T₂ - T₁) (T₂ - T₁)/T₁ (T₁ - T₂)/T₁ ANSWER DOWNLOAD EXAMIANS APP
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