51. In a refrigerating machine, heat rejected is _________ heat absorbed.
52. During sensible heating of air _________ decreases.
53. During humidification process, __________ increases.
54. The boiling point of ________ is 10.5°C.
55. Pick up the correct statement about giving up of heat from one medium to other in ammonia absorption system
56. An infinite parallel planes with emissivities e1 and e2, the interchange factor for radiation from surface 1 to surface 2 is given by
57. A one tonne refrigerating machine means that
58. When the air is passed through an insulated chamber having sprays of water maintained at a temperature higher than the dew point temperature of entering air but lower than its dry bulb temperature, then the air is said to be
59. The unit of thermal diffusivity is
60. Ammonia is
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