Fourier’s law applies to the heat transfer by__________________?

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...

With increase in temperature, the total emissivity of conductors____________________?

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

Pick out the wrong statement?

A. In process heat exchangers, saturated steam is preferred over the superheated steam B. The maximum is the emissive power of a surface at a temperature T1 occurs at a wavelength of λ1. If the surface temperature is halved, the maximum in the emissive power would occur at a wavelength of 0.5 λ1 C. When … Pick out the wrong statement?Read More...

In a gas-liquid shell and tube heat exchanger, the_________________?

A. Presence of a non-condensable gas decreases the condensing film co-efficient B. Gases under high pressure are routed through the tube side, because high pressure gases are corrosive in nature C. Gases to be heated/cooled is normally routed through the shell side, because the corrosion caused by the cooling water or steam condensate remain localised … In a gas-liquid shell and tube heat exchanger, the_________________?Read More...

Which of the following has maximum thermal conductivity ?

A. Iron B. Coal C. Nitrogen D. Tar...