Heat and Mass Transfer
Fourier's law of heat conduction is (where Q = Amount of heat flow through the body in unit time, A = Surface area of heat flow, taken at right angles to the direction of heat flow, dT = Temperature difference on the two faces of the body, dx = Thickness of the body, through which the heat flows, taken along the direction of heat flow, and k = Thermal conductivity of the body)

k. (dT/dx)
k. A. (dT/dx)
k. A. (dx/dT)
k. (dx/dT)

ANSWER DOWNLOAD EXAMIANS APP

Heat and Mass Transfer
According of Kirchhoff's law

Radiant heat is proportional to fourth power of absolute temperature
Emissive power and absorptivity are constant for all bodies
Emissive power depends on temperature
Ratio of emissive power to absorptive power for all bodies is same and is equal to the emissive power of a perfectly black body

ANSWER DOWNLOAD EXAMIANS APP

Heat and Mass Transfer
Film coefficient is defined as the ratio of

Thickness of film of fluid to the temperature drop through the films of fluids
Thermal conductivity to the equivalent thickness of the film of fluid
Temperature drop through the films of fluids to the thickness of film of fluids
Thickness of film of fluid to the thermal conductivity

ANSWER DOWNLOAD EXAMIANS APP
MORE MCQ ON Heat and Mass Transfer