Nusselt number is the ratio of the temperature gradient at the wall to_________________?

Related Mcqs:

For what value of Prandtl number, St = f/2 ?

A. 1.5 B. 1 C. > 1 D. < 1...

Solid angle subtended by the finite surface at the radiating element is_________________?

A. Called the view factor B. Called the angle of vision C. Proportional to the square of the distance between surfaces D. Expressed in terms of radians...

To reduce the tube side pressure drop for the same flow rate, the heat exchanger recommended is _______________?

A. 1-2 heat exchanger B. 1-1 heat exchanger C. 3-2 heat exchanger D. 2-4 heat exchanger...

It is desired to concentrate a 20% salt solution (20 kg of salt in 100 kg of solution) to a 30% salt solution in an evaporator. Consider a feed of 300 kg/min at 30°C. The boiling point of the solution is 110°C, the latent heat of vaporisation is 2100 kJ/kg and the specific heat of the solution is 4 kJ/kg.K. The rate at which the heat has to be supplied in (kJ/min) to the evaporator is____________________?

A. 3.06 × 105 B. 6.12 × 105 C. 7.24 × 105 D. 9.08 × 105...

Radiation heat losses from satisfactorily insulated high pressure boiler may be about _____________ percent?

A. 1 B. 7 C. 18 D. 26...