If heat transfer rate varies with the time, it is termed as__________________?

Related Mcqs:

Conductance is given by (where, x = thickness, A = heat flow area, K = thermal conductivity.)?

A. x/KA B. KA/x C. K/Ax D. A/Kx...

A sphere of radius ‘R1’ is enclosed in a sphere of radius ‘R2’. The view (or shape) factor for radiative heat transfer of the outer sphere with respect to the inner sphere is ________________?

A. 0 B. R2/(R1+R2) C. 1 D. (R1/R2)2...

With increase in temperature, the thermal conductivity of fresh lubricating oil ___________________?

A. Increases B. Decreases C. Remains unchanged D. May increase or decrease; depends on its composition...

It is desired to concentrate a 20% salt solution (20 kg of salt in 100 kg of solution) to a 30% salt solution in an evaporator. Consider a feed of 300 kg/min at 30°C. The boiling point of the solution is 110°C, the latent heat of vaporisation is 2100 kJ/kg and the specific heat of the solution is 4 kJ/kg.K. The rate at which the heat has to be supplied in (kJ/min) to the evaporator is____________________?

A. 3.06 × 105 B. 6.12 × 105 C. 7.24 × 105 D. 9.08 × 105...

In the free convection regime of pool boiling, the heat flux is proportional to__________________?

A. Δt1/2 B. Δt2 C. Δt5/4 D. Δt...