What is the absorptivity of a black body?

Related Mcqs:

Loss of heat from untagged steam pipe to the ambient air is by __________________?

A. Conduction B. Convection C. Radiation D. All A., B. & C....

Heat transfer by ____________ may not necessarily require the presence of a medium?

A. Conduction B. Natural convection C. Forced convection D. Radiation...

During crystallisation, formation of crystal can occur in ______________ solution only?

A. Saturated B. Supersaturated C. Under-saturated D. All A., B. and C....

Heat exchangers operating, when the asymptotic range is reached, ?

A. Provide very large heat transfer co-efficient B. Results in making part of the heating surface inactive C. Results in abruptly increased velocity D. None of these...

Pick out the wrong statement?

A. Orifice baffles are never used in a shell and tube heat exchanger B. Pressure drop on the shell side of a heat exchanger depends upon tube pitch also C. In a horizontal tube evaporator, surface blanketing by air is avoided D. Split ring type and pull through type floating heads are two commonly used … Pick out the wrong statement?Read More...