Heat and Mass Transfer Heat transfer by radiation mainly depends upon All of these Its temperature Nature of the body Kind and extent of its surface All of these Its temperature Nature of the body Kind and extent of its surface ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer The most commonly used method for the design of duct size is the Equal friction method Velocity reduction method Static regains method Dual or double method Equal friction method Velocity reduction method Static regains method Dual or double method ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer Thermal conductivity of water _________ with rise in temperature. May increase or decrease depending upon temperature Increases Decreases Remain same May increase or decrease depending upon temperature Increases Decreases Remain same ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer A designer chooses the values of fluid flow rates and specific heats in such a manner that the heat capacities of the two fluids are equal. A hot fluid enters the counter flow heat exchanger at 100°C and leaves at 60°C. A cold fluid enters the heat exchanger at 40°C. The mean temperature difference between the two fluids is 40°C 66.7°C 20°C 60°C 40°C 66.7°C 20°C 60°C ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer A steam pipe is to be lined with two layers of insulating materials of different thermal conductivities. For the minimum heat transfer, The better insulation must be put outside One could place either insulation on either side One should take into account the steam temperature before deciding as to which insulation is put where The better insulation must be put inside The better insulation must be put outside One could place either insulation on either side One should take into account the steam temperature before deciding as to which insulation is put where The better insulation must be put inside ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer The time constant of a thermocouple is The time taken to attain 63.2% of the value of initial temperature difference The time taken to attain the final temperature to be measured The time taken to attain 50% of the value of initial temperature difference Determined by the time taken to reach 100°C from 0°C The time taken to attain 63.2% of the value of initial temperature difference The time taken to attain the final temperature to be measured The time taken to attain 50% of the value of initial temperature difference Determined by the time taken to reach 100°C from 0°C ANSWER DOWNLOAD EXAMIANS APP
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