Home

What is the correct answer?

4

Thermal conductivity of air at room temperature in kcal/m hr °C is of the order of

A. 0.002

B. 0.02

C. 0.01

D. 0.1

Correct Answer :

B. 0.02


Related Questions

The transfer of heat by molecular collision is known as Which of the following statement is wrong? Thermal conductivity of glass wool varies from sample to sample because… Stefan Boltzmann law is applicable for heat transfer by Which of the following property of air does not increase with rise in… The ratio of the energy absorbed by the body to total energy falling on… Reynolds number (RN) is given by (where h = Film coefficient, l = Linear… The heat transfer by conduction through a thick sphere is given by Fourier's law of heat conduction is valid for Depending on the radiating properties, a body will be white when The value of the wavelength for maximum emissive power is given by The use of heat exchangers is made in A cube at high temperature is immersed in a constant temperature bath.… The ratio of surface convection resistance to the internal conduction… Sensible heat is the heat required to Two plates spaced 150 mm apart are maintained at 1000°C and 70°C.… A heat exchanger with heat transfer surface area A and overall heat transfer… The time constant of a thermocouple is Thermal conductivity of wood depends on The value of the wave length for maximum emissive power is given by The heat transfer takes place according to In a shell and tube heat exchanger, baffles are provided on the shell… The most commonly used method for the design of duct size is the Sensible heat factor is given by (where S.H. = Sensible heat, and L.H.… According to Wien's law, the wavelength corresponding to maximum energy… The amount of radiation mainly depends upon the A steam pipe is to be lined with two layers of insulating materials of… According to Dalton's law of partial pressures, (where pb = Barometric… When heat is transferred from hot body to cold body, in a straight line,… A perfect black body is one which