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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

Vacuum is generally maintained in the vapour space of an evaporator mainly to__________________?

Chemical Heat Transfer /
Vacuum is generally maintained in the vapour space of an evaporator mainly to__________________?

A. Get economical temperature difference by using moderate pressure steam
B. Facilitate forward feeding in multiple effect evaporation
C. Concentrate heat sensitive materials
D. Achieve very high concentration of the final product

Vacuum is generally maintained in the vapour space of an evaporator mainly to__________________? Read More »

Chemical Heat Transfer