Heat Transfer Steady state one dimensional heat flow by conduction as given by Fourier's low does not assume that There is no internal heat generation Constant temperature gradient exists Material is anisotropic Boundary surfaces are isothermal There is no internal heat generation Constant temperature gradient exists Material is anisotropic Boundary surfaces are isothermal ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer 1000 kg of wet solids are to be dried from 60% to 20% moisture (by weight). The mass of moisture removed in kg is 400 200 500 520 400 200 500 520 ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer A metal ball of radius 0.1 m at a uniform temperature of 90°C is left in air at 30°C. The density and the specific heat of the metal are 3000 kg/m³ and 0.4 kJ/kg.K respectively. The heat transfer co-efficient is 50 W/m².K Neglecting the temperature gradients inside the ball, the time taken (in hours) for the ball to cool to 60°C is 55.5 0.15 555 0.55 55.5 0.15 555 0.55 ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer The thermal efficiency of a reversible heat engine operating between two given thermal reservoirs is 0.4. The device is used either as a refrigerator or as a heat pump between the same reservoirs. Then the coefficient of performance as a refrigerator (COP)R and the co-efficient of performance as a heat pump (COP)HP are (COP)R = (COP)HP = 0.6 (COP)R = 1.5; (COP)HP = 2.5 (COP)R = 2.5; (COP)HP = 1.5 (COP)R = (COP)HP = 2.5 (COP)R = (COP)HP = 0.6 (COP)R = 1.5; (COP)HP = 2.5 (COP)R = 2.5; (COP)HP = 1.5 (COP)R = (COP)HP = 2.5 ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer In the free convection regime of pool boiling, the heat flux is proportional to Δt Δt2 Δt1/2 Δt5/4 Δt Δt2 Δt1/2 Δt5/4 ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer In a cooling tower, water becomes cool by Loosing latent heat Heat transfer to surroundings Vaporisation due to heat loss to air Loosing sensible heat Loosing latent heat Heat transfer to surroundings Vaporisation due to heat loss to air Loosing sensible heat ANSWER DOWNLOAD EXAMIANS APP
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