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Process Equipment and Plant Design

Process Equipment and Plant Design
Tube side pressure drop in a 1-2 heat exchanger (for turbulent flow of fluids through the tubes) is about __________ times, that in a 1-1 heat exchanger having the same size & number of tubes and operated at the same liquid flow rate.

4
2
1/2
8

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Process Equipment and Plant Design
The difficulty of liquid distribution in packed towers is accentuated, when the ratio of tower diameter to packing diameter is

> 20 < 50
< 30
< 7
> 7 < 15

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Process Equipment and Plant Design
In a distillation column, minimum clearance to be maintained betweeen the overflow weir and the last row of the bubble caps is __________ cms.

7.5
20
15
2.5

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Process Equipment and Plant Design
Normally, the length to diameter ratio of rotary dryers varies form 4 to 10 and for its economic operation, the number of transfer units (NTU) for such dryers varies from

3.5-5.5
1.5-2.5
44119
7.5-10.0

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Process Equipment and Plant Design
Nominal size of a pipe is an indication of its __________ diameter.

Outer
Approximate
Inner
None of these

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Process Equipment and Plant Design
Le/D for fully open gate valves would be

Both B and C
Much less (say 2% than that for fully open globe valves)
Much more than that for fully open globe valves
Around 7

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