Refrigeration and Air Conditioning When the lower temperature of a refrigerating machine is fixed, then the coefficient of performance can be improved by Lowering the higher temperature Operating the machine at higher speeds Raising the higher temperature Operating the machine at lower speeds Lowering the higher temperature Operating the machine at higher speeds Raising the higher temperature Operating the machine at lower speeds ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning A reversible engine has ideal thermal efficiency of 30%. When it is used as a refrigerating machine with all other conditions unchanged, the coefficient of performance will be 3.33 4.33 2.33 1.33 3.33 4.33 2.33 1.33 ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning A refrigeration system Removes heat from a high temperature body and delivers it to a low temperature body None of the listed here Rejects energy to a low temperature body Removes heat from a low temperature body and delivers it to a high temperature body Removes heat from a high temperature body and delivers it to a low temperature body None of the listed here Rejects energy to a low temperature body Removes heat from a low temperature body and delivers it to a high temperature body ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning In a vapour compression cycle, the refrigerant immediately after expansion valve is Liquid Sub-cooled liquid Wet vapour Saturated liquid Liquid Sub-cooled liquid Wet vapour Saturated liquid ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning In vapour compression cycle using NH₃ as refrigerant, initial charge is filled at Low pressure side near receiver Delivery of compressor High pressure side close to receiver Suction of compressor Low pressure side near receiver Delivery of compressor High pressure side close to receiver Suction of compressor ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning The condition of refrigerant as it leaves the compressor in a vapour compression system is Wet vapour Dry saturated vapour Superheated vapour Saturated liquid Wet vapour Dry saturated vapour Superheated vapour Saturated liquid ANSWER DOWNLOAD EXAMIANS APP
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