71. A refrigerant with the highest critical pressure is
72. The cooling system used for supersonic aircrafts and rockets is
73. Presence of moisture in a refrigerant affects the working of
74. The refrigerant used for absorption refrigerators working on heat from solar collectors is a mixture of water and
75. The air cooling system mostly used in transport type aircrafts is
76. The freezing point of sulphur dioxide is
77. In vapour compression cycle the condition of refrigerant is superheated vapour
78. Most air cooled condensers are designed to operate with a temperature difference of
79. The humidity ratio or specific humidity is the mass of water vapour present in
80. The reciprocating refrigerant compressors are very suitable for
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