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Process Equipment and Plant Design

Process Equipment and Plant Design
The slope of the feed line in distillation opeartion is given by (where, q = fraction of the feed stream that is liquid.)

-q/(q-1)
None of these
-q/(1-q)
-q

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Process Equipment and Plant Design
The absorption factor is defined as (where, S₁ = slope of the equilibrium curve, S₂ = slope of the operating line)

S₁.S₂
S₂/S₁
1/S₁.S₂
S₁/S₂

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Process Equipment and Plant Design
Normally, the ratio of the total riser area to the tower cross sectional area (for bubble cap towers of diameter more than 3 ft) is around

0.35-0.75
0.1-0.2
0.4-0.6
0.55-0.85

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Process Equipment and Plant Design
The thermal stress in a metallic bar does not depend upon the

Both A & B
Cross-sectional area
Changes in temperature
Neither A nor B

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Process Equipment and Plant Design
If a single tube pass heat exchanger is converted to two passes; for the same flow rate, the pressure drop per unit length in tube side will __________ times.

Increase by 21.6
Decrease by 22
Increase by 1.8
None of these

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Process Equipment and Plant Design
In the downcomer of a distillation column, the minimum recommended residence time is about __________ seconds.

12.5
5
2.5
17.5

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