Thermal diffusivity of a material __________________?

Related Mcqs:

With increase in temperature, the total emissivity of conductors____________________?

A. Increases B. Decreases C. Remain same D. Decreases linearly...

Minimum recommended baffle spacing in a shell and tube heat exchanger is about (where, D = shell diameter)?

A. 0.2 D B. 0.5 D C. 0.66 D D. 0.80 D...

For large heat transfer area requirement, shell and tube heat exchanger is preferred, because it________________?

A. Occupies smaller space B. Is more economical C. Is easy to operate and maintain D. All A., B. and C....

Fruit juice (a heat sensitive material) can be concentrated in a ____________ evaporator?

A. Long tube B. Falling film C. High pressure D. None of these...

In sub-cooled boiling ?

A. Temperature of the heating surface is less than the boiling point of the liquid B. Temperature of the heating surface is more than the boiling point of the liquid C. Bubbles from heating surface are absorbed by the mass of the liquid D. Very large vapour space is necessary...