Heat and Mass Transfer Heat transfer by radiation mainly depends upon 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 All of these ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer Thermal diffusivity of a substance is given by (where h = Thermal diffusivity, ρ = Density of substance, S = Specific heat, and k = Thermal conductivity) h = kρ/S h = S/ρk h = k/ ρS h = ρS/k h = kρ/S h = S/ρk h = k/ ρS h = ρS/k ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer The time constant of a thermocouple is The time taken to attain the final temperature to be measured The time taken to attain 50% of the value of initial temperature difference The time taken to attain 63.2% of the value of initial temperature difference Determined by the time taken to reach 100°C from 0°C The time taken to attain the final temperature to be measured The time taken to attain 50% of the value of initial temperature difference The time taken to attain 63.2% of the value of initial temperature difference Determined by the time taken to reach 100°C from 0°C ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer Free convection flow depends on All of these Coefficient of viscosity Density Gravitational force All of these Coefficient of viscosity Density Gravitational force ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer The value of Prandtl number for air is about 0.7 0.3 1.7 0.1 0.7 0.3 1.7 0.1 ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer Fourier's law of heat conduction is valid for One dimensional cases only Two dimensional cases only Three dimensional cases only Regular surfaces having non-uniform temperature gradients One dimensional cases only Two dimensional cases only Three dimensional cases only Regular surfaces having non-uniform temperature gradients ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS