Heat and Mass Transfer The value of the wavelength for maximum emissive power is given by Fourier's law Planck's law Wien’s law Stefan's law Fourier's law Planck's law Wien’s law Stefan's law ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer Absorptivity of a body will be equal to its emissivity When system is under thermal equilibrium At all temperatures At critical temperature At one particular temperature When system is under thermal equilibrium At all temperatures At critical temperature At one particular temperature ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer Depending on the radiating properties, body will be transparent when (Where a = absorptivity, p = reflectivity, x = transmissivity) X = 0, a + p = 1 P = 0, x= 1, and a = 0 P=1, x = 0, and a = 0 P = 0, x = 0 and a = 1 X = 0, a + p = 1 P = 0, x= 1, and a = 0 P=1, x = 0, and a = 0 P = 0, x = 0 and a = 1 ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer Radiation is the process of heat transfer in which heat flows from a ________, in a straight line, without affecting the intervening medium. Larger body to smaller body Hot body to cold body Cold body to hot body Smaller body to larger body Larger body to smaller body Hot body to cold body Cold body to hot body Smaller body to larger body ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer In counter current flow heat exchanger, the logarithmic temperature difference between the fluids is ________ as compared to parallel flow heat exchanger. Greater Same None of these Less Greater Same None of these Less 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 20°C 66.7°C 60°C 40°C 20°C 66.7°C 60°C ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS