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March 2019

The advantage of backward feed multiple effect evaporators over forward feed units is that___________________?

Chemical Heat Transfer /
The advantage of backward feed multiple effect evaporators over forward feed units is that___________________?

A. Heat sensitive material can be handled
B. There is no additional cost of pumg
C. Most concentrated liquid is at highest temperature
D. Equal heat transfer co-efficients exist in various effects

The advantage of backward feed multiple effect evaporators over forward feed units is that___________________? Read More »

Chemical Heat Transfer

In case of a multipass shell and tube heat exchanger, providing a baffle on the shell side ______________ the heat transfer rate?

Chemical Heat Transfer /
In case of a multipass shell and tube heat exchanger, providing a baffle on the shell side ______________ the heat transfer rate?

A. Increases
B. Decreases
C. Does not affect
D. May increase or decrease, depends on the type of baffle

In case of a multipass shell and tube heat exchanger, providing a baffle on the shell side ______________ the heat transfer rate? Read More »

Chemical Heat Transfer

As the difference between the wall temperature and bulk temperature increases, the boiling heat transfer co-efficient ?

Chemical Heat Transfer /
As the difference between the wall temperature and bulk temperature increases, the boiling heat transfer co-efficient ?

A. Continues to increase
B. Continues to decrease
C. Goes through a minimum
D. Goes through a maximum

As the difference between the wall temperature and bulk temperature increases, the boiling heat transfer co-efficient ? Read More »

Chemical Heat Transfer

If the baffle spacing in a shell and tube heat exchanger increases, then the Reynolds number of the shell side fluid_________________?

Chemical Heat Transfer /
If the baffle spacing in a shell and tube heat exchanger increases, then the Reynolds number of the shell side fluid_________________?

A. Remains unchanged
B. Increases
C. Increases or decreases depending on number of shell passes
D. Decreases

If the baffle spacing in a shell and tube heat exchanger increases, then the Reynolds number of the shell side fluid_________________? Read More »

Chemical Heat Transfer