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Process Equipment and Plant Design

Process Equipment and Plant Design
In most of the shell and tube heat exchangers, the tube pitch is generally __________ the tube diameter.

Less than
One-fourth of
1.25-1.50 times
2.5 times

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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)

S₂/S₁
S₁/S₂
1/S₁.S₂
S₁.S₂

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Process Equipment and Plant Design
Spherical shaped pressure vessel is considered to be the most ideal, because it can

Be designed without wind load considerations
Withstand higher pressure for a given metallic shell thickness
Be supported very easily
Be fabricated very easily

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Process Equipment and Plant Design
For annular flow of a fluid, the ratio of the equivalent diameter for pressure drop calculation to the equivalent diameter for heat transfer calculation is

(d1 + d2)/d2
(d1 + d2)/d1
D2/(d1 + d2)
D1/(d1 + d2)

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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

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

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Process Equipment and Plant Design
The distance between the centre of a rivet hole to the nearest edge of the plate is called

Back pitch
Margin
None of these
Pitch

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