The thermal boundary layer at NPr > 1 ?

Related Mcqs:

LMTD can’t be used as such without a correction factor for the_________________?

A. Multipass heat exchanger B. Baffled heat exchanger C. Condensation of mixed vapour in a condenser D. All A. B. and C....

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...

Heat transfer rate described by Fourier’s law will decrease, if the _____________ increases?

A. Thermal conductivity B. Thickness C. Temperature difference D. Heat transfer area...

The Nusselt number for fully developed (both thermally and hydrodynamically) laminar flow through a circular pipe, where the wall heat flux is constant, is__________________?

A. 2.36 B. 4.36 C. 120.36 D. Dependent on NRe only...

Air is to be heated by condensing steam. Two heat exchangers are available (i) a shell and tube heat exchanger and (ii) a finned tube heat exchanger. Tube side heat transfer area are equal in both the cases. The recommended arrangement is________________?

A. Finned tube heat exchanger with air inside and steam outside B. Finned tube heat exchanger with air outside and steam inside C. Shell and tube heat exchanger with air inside tubes and steam on shell side D. Shell and tube heat exchanger with air on shell side and steam inside tubes...