Heat Transfer Thermal conductivities of most of the liquids __________ with rise in temperature. Decreases Remains unchanged May increase or decrease; depends on the liquid Increases Decreases Remains unchanged May increase or decrease; depends on the liquid Increases ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Economy of a multiple effect evaporator depends upon the Heat balance consideration Both A and B Rate of heat transfer Neither A nor B Heat balance consideration Both A and B Rate of heat transfer Neither A nor B ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer 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 Decrease First decrease and then increase First increase and then decrease Increase Decrease First decrease and then increase First increase and then decrease Increase ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Which of the following has the lowest Prandtl number? Water Molten sodium (a coolant used in fast breeder reactor) Dilute H₂SO₄ Transformer oil Water Molten sodium (a coolant used in fast breeder reactor) Dilute H₂SO₄ Transformer oil ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer The critical radius 'r' of insulation on a pipe is given by r = h/k r = 2k/h r = k/h r = k/2h r = h/k r = 2k/h r = k/h r = k/2h ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer In a shell and tube heat exchanger, There is no relationship between temperature drop and resistance The temperature drops in the two fluids and the wall are proportional to individual resistances The relationship is not generalised The temperature drop is inversely proportional to the resistance across which the drop occurs There is no relationship between temperature drop and resistance The temperature drops in the two fluids and the wall are proportional to individual resistances The relationship is not generalised The temperature drop is inversely proportional to the resistance across which the drop occurs ANSWER DOWNLOAD EXAMIANS APP
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