The units of resistance to heat transfer is _____________________?

Related Mcqs:

Heat sensitive materials can be concentrated in an evaporator employing_______________?

A. Vacuum B. High pressure C. High residence time D. None of these...

‘Duhring’s plot’ is of use in_________________?

A. Extractive distillation B. Evaporation C. Leaching D. Absorption...

The inner wall of a furnace is at a temperature of 700°C. The composite wall is made of two substances, 10 and 20 cm thick with thermal conductivities of 0.05 and 0.1 W.m-1.°C- 1 respectively. The ambient air is at 30°C and the heat transfer co-efficient between the outer surface of wall and air is 20 W.m-2.°C-1. The rate of heat loss from the outer surface in W.m-2is__________________?

A. 165.4 B. 167.5 C. 172.5 D. 175...

A BTU/hr.ft.2 °F is equal to_________________?

A. 1 kcal/hr. m2°C B. 4.88 kcal/hr. m.2°C C. 1 kcal/hr. m2.°K D. None of these...

Stefan-Boltzmann law which describes the radiation heat transfer states that, it is proportional to (where, t = temperature in °C T = absolute temperature in ° K) ?

A. t4 B. T4 C. 1/t4 D. 1/T4...