EXAMIANS
The insulation ability of an insulator with the presence of moisture would
YOUR ANSWER : ?
YOUR ANSWER : ?
Planck’s law holds good for
YOUR ANSWER : ?
A steam pipe is to be lined with two layers of insulating materials of different thermal conductivities. For the minimum heat transfer,
YOUR ANSWER : ?
The use of heat exchangers is made in
YOUR ANSWER : ?
Heat flows from one body to other when they have
YOUR ANSWER : ?
When heat is transferred from hot body to cold body, in a straight line, without affecting the intervening medium, it is referred as heat transfer by
YOUR ANSWER : ?
Two long parallel surfaces each of emissivity 0.7 are maintained at different temperatures and accordingly have radiation heat exchange between them. It is desired to reduce 75% of the radiant heat transfer by inserting thin parallel shields of emissivity 1 on both sides. The number of shields should be
YOUR ANSWER : ?
Reynolds number (RN) is given by (where h = Film coefficient, l = Linear dimension, V = Velocity of fluid, k = Thermal conductivity, t = Temperature, ρ = Density of fluid, cp = Specific heat at constant pressure, and μ = Coefficient of absolute viscosity)
YOUR ANSWER : ?
According to Stefan Boltzmann law, ideal radiators emit radiant energy at a rate proportional to
YOUR ANSWER : ?
The transfer of heat by molecular collision is known as
YOUR ANSWER : ?