131. In a heat exchanger, one transfer unit means
132. When does the heat generated by fluid friction becomes appreciable compared to the heat transferred between the fluids?
133. __________ chart is known as transient heat conduction chart.
134. It is not preferable to use superheated steam in evaporators, because of its very
135. Vent pipes are provided in a condenser to
136. Electro-magnetic spectrum range, which is important for radiation varies from __________ microns.
137. Which of the following has the lowest Prandtl number?
138. Which has the lowest Prandtl number?
139. The absorptivity of a grey body at a given temperature __________ with increasing wavelength of radiation.
140. For a given ambient air temperature with increase in the thickness of insulation of a hot cylinderical pipe, the rate of heat loss from the surface would
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