When does the heat generated by fluid friction becomes appreciable compared to the heat transferred between the fluids ?

Related Mcqs:

Fouling factor for a heat exchanger is given by (where, U1 = heat transfer co-efficient of dirty surface U2 = heat transfer co-efficient of clean surface) ?

A. U1 – U2 B. 1/U1 – 1/U2 C. 1/U2 – 1/U1 D. U2 – U1...

Maximum heat transfer rate is obtained in ______________ flow?

A. Laminar B. Turbulent C. Creeping D. Transition region...

A sphere of radius ‘R1’ is enclosed in a sphere of radius ‘R2’. The view (or shape) factor for radiative heat transfer of the outer sphere with respect to the inner sphere is ________________?

A. 0 B. R2/(R1+R2) C. 1 D. (R1/R2)2...

The Stefan-Boltzmann constant depends on the_________________?

A. Medium B. Temperature C. Surface D. None of these...

In a shell and tube heat exchanger, the shell side fluid velocity can‟t be changed by changing the_________________?

A. Tube layout B. Tube diameter C. Tube pitch D. Number of baffles...