The thermal diffusivities for solids are generally__________________?

Related Mcqs:

Thermal conductivity of water in general with rise in temperature ____________________?

A. increases B. decreases C. remains constant D. may increase or decrease depending on temperature E. none of the above...

The ratio of heat flow Q1/Q2 from two walls of same thickness having their thermal conductivities as ATj – 2K2 will be ________________?

A. I B. 0.5 C. 2 D. 0.25 E. 4.0...

In heat exchangers, degree of approach is defined as the difference between temperatures of________________?

A. cold water inlet and outlet B. hot medium inlet and outlet C. hot medium outlet and cold water inlet D. hot medium outlet and cold water outlet E. none of the above...

The unit of overall coefficient of heat transfer is___________________?

A. kcal/m2 B. kcal/hr °C C. kcal/m2 hr °C D. kacl/m hr °C E. kcal/m3 hr °C...

Depending on the radiating properties, a body will be white when_________________?

A. p = 0, x = 0 and a = 1 B. p=l,T = 0anda = 0 C. p = 0, x = 1 and a = 0 D. x = 0, a + p = 1 E. a = 0, x + p = 1. where a = absorptivity, p = reflectivity, x = … Depending on the radiating properties, a body will be white when_________________?Read More...