Thermal diffusivity is the most important in heat transfer by__________________?

Related Mcqs:

In case of parallel flow heat exchanger, the lowest temperature theoretically attainable by the hot fluid is _____________ the outlet temperature of the cold fluid?

A. Equal to B. More than C. Less than D. Either more or less than (depending upon the fluid)...

At what value of Prandtl number, conduction is negligible in the turbulent core of a fluid flowing through a heated pipe ?

A. 0.5 B. < 0.5 C. > 0.6 D. < 0.1...

Forced circulation evaporators are useful for the concentration of viscous, salting and scale forming liquors. Which of the following is a forced circulation evaporator ?

A. Long vertical evaporator B. Horizontal tube evaporator C. Agitated film evaporator D. Calandria vertical tube evaporator...

Overall heat transfer co-efficient of a particular tube is U1. If the same tube with some dirt deposited on either side has coefficient U2, then_________________?

A. U1 = U2 B. U2 > U1 C. U1 > U2 D. U1 = dirt factor – U2...

It is not recommended to use a 1-2 shell and tube heat exchanger for a particular heat duty, whenever the LMTD correction factor is___________________?

A. > 0.75 B. < 0.75 C. < 0.50 D. < 0.25...