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

Related Mcqs:

Heat is closely related with___________________?

A. liquids B. energy C. temperature D. entropy E. enthalpy...

In heat transfer, conductance equals conductivity (kcal/hr/sqm/°C/cm) divided by ________________?

A. hr (time) B. sqm (area) C. °C (temperature) D. cm (thickness) E. kcal (heat)....

In convection heat transfer from hot flue gases to water tube, even though flow may be turbulent, a laminar flow region (boundary layer of film) exists close to the tube. The heat transfer through this film takes place by___________________?

A. convection B. radiation C. conduction D. both convection and conduction E. none of the above...

All radiations in a black body are___________________?

A. reflected B. refracted C. transmitted D. absorbed E. partly reflected and partly absorbed...

Absorptivity of a body will be equal to its emissivity___________________?

A. at all temperatures B. at one particular temperature C. when system is under thermal equi-librium D. at critical temperature E. for a polished body...