Prandtl and Reynolds analogy are same, when Prandtl number is____________________?

Related Mcqs:

Walls of a cubical oven are of thickness l, and they are made of material of thermal conductivity k. The temperature inside the oven is 100°C and the inside heat transfer coefficient is „3k/l’. If the wall temperature on the outside is held at 25°C, what is the inside wall temperature in degree centigrade ?

A. 35.5 B. 43.75 C. 81.25 D. 48.25...

A black body does not ____________ radiation?

A. Absorb or emit B. Refract C. Reflect D. Both B. & C....

In case of _______________ boiling, the liquid temperature is below the saturation temperature and the boiling takes place in the vicinity of the heated surface?

A. Nucleate B. Local C. Pool D. Saturated...

In a forward feed multiple effect evaporator unit__________________?

A. Viscosity of liquid is highest in first effect B. Transfer from effect to effect is done by pumps C. No pump is required to withdraw the product from the last effect D. None of these...

Pick out the wrong statement ?

A. With change in temperature, the radiant energy emitted by a black body remains unchanged B. Absorptivity of a body approaches unity in case of diffuse reflection C. Absorptivity of a perfectly black body is unity D. Value of Stefan-Boltzmann constant is 4.876 × 10-8 KCal/m2.hr.°K4...