Heat Transfer The actual temperature drop across the heating surface in an evaporator depends on the Depth of liquid over heating surface Feed All of these Pressure difference between steam chest and vapour space Depth of liquid over heating surface Feed All of these Pressure difference between steam chest and vapour space ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Log mean temperature difference (LMTD) cannot be used, if the heat capacity is not constant and there is a phase change. heat transfer co-efficient over the entire heat exchanger is not constant none of the listed here there exists an unsteady state the heat capacity is not constant and there is a phase change. heat transfer co-efficient over the entire heat exchanger is not constant none of the listed here there exists an unsteady state ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer The energy radiated from a surface Q at absolute temperature T is related as Q ∝ T⁴ None of these Q ∝ T³ Q ∝ T² Q ∝ T⁴ None of these Q ∝ T³ Q ∝ T² ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Which of the following has the minimum absorptivity? Iron plates Coal dust Refractory bricks Aluminium foil Iron plates Coal dust Refractory bricks Aluminium foil ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer At what value of Prandtl number, the hydrodynamic and thermal boundary layers of a fluid flowing over a heated plate will be identical? 1 < 1 None of these > 1 1 < 1 None of these > 1 ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer With increase in temperature, the thermal conductivity of a gas Remains same Increases Decreases May increase or decrease depending on the type of gas Remains same Increases Decreases May increase or decrease depending on the type of gas ANSWER DOWNLOAD EXAMIANS APP
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