In which mode of heat transfer, the Biot number is important ?

Related Mcqs:

For the same heat load and mass flow rate in the tube side of a shell and tube heat exchanger, one may use multipass on the tube side, because it__________________?

A. Decreases the pressure drop B. Decreases the outlet temperature of cooling medium C. Increases the overall heat transfer coefficient D. None of these...

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...

Electro-magnetic spectrum range, which is important for radiation varies from _____________ microns?

A. 1 to 100 B. 0.5 to 50 C. 10 to 100 D. 100 to 1000...

LMTD for evaporators & condensers for a given terminal parameters & set of conditions for counter-flow is equal to that for parallel flow. In such heat exchangers, with one of the fluids condensing or evaporating, the surface area required is the least in the ______________ flow?

A. Parallel B. Mixed C. Counter flow D. Same in either A , B. or C....