102. One tonne of refrigeration (1TR) means that the heat removing capacity is
103. The operating pressure for refrigerating units using R-12 as a refrigerant is
104. The specific humidity during heating and humidification process.
105. The superheated vapour region, in a pressure enthalpy chart, is represented by the space
106. The minimum temperature to which water can be cooled in a cooling tower is
107. The index which corelates the combined effects of air temperature, relative humidity and air velocity on the human body, is known as
108. The ratio of Nusselt number and the product of Reynold's number and Prandtl number is equal to
109. The alignment circle is marked on the psychrometric chart at
110. The C.O.P. of a Carnot refrigerator in winter will be __________ as compared to C.O.P. in summer.
111. When the temperature of the surrounding is higher than the temperature of the body, then the heat loss by convection from the body to the surrounding will be
112. If a gas is to be liquified, its temperature must be
113. The thermostatic expansion valve is used in __________ type of evaporators.
114. According to Prevost's theory of exchanges, every body irrespective of its temperature continuously emit heat radiations to the surrounding bodies and at the same time receives heat radiations from the surrounding bodies.
115. In a boot-strap air evaporative cooling system, the evaporator is provided
116. According to Stefan-Boltzmann law, the total radiation from a black body per second per unit area is directly proportional to the
117. A good refrigerant should have
118. The thermal diffusivity for gases is generally __________ those for liquids.
119. The condition of refrigerant after passing through the expansion or throttle valve, in a vapour compression system is
120. The process of adding moisture to the air, without change in its dry bulb temperature, is known as humidification.
121. In case of liquids and gases, the heat transfer takes place according to
122. The logarithmic mean temperature difference (tm) is given by (where Δt1 and Δt2 are temperature differences between the hot and cold fluids at entrance and exit)
123. The radiation emitted by a black body is known as
124. The sensible heat during humidification process decreases.
125. According to Newton's law of cooling, the heat transfer from a hot body to a cold body is