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Process Equipment and Plant Design

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

1/S₁.S₂
S₁.S₂
S₂/S₁
S₁/S₂

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Process Equipment and Plant Design
Lessing ring is formed by the addition of a partition across the centre of a raschig ring, which results in an area increase of about __________ percent.

5
20
35
55

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Process Equipment and Plant Design
Bubble cap plate column is

A continuous contactor
A finite stage contactor
A differential stage contactor
Used only for distillation, not for absorption

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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

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

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Process Equipment and Plant Design
For a cylinderical internally pressurised vessel, which of the following closure types would withstand highest pressure, if each closure is of the same material and thickness?

Ellipsoidal (2 : 1)
Flat plate
Conical
Hemispherical

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Process Equipment and Plant Design
In inclined long tube vertical evaporators, the tubes are inclined at an angle of

60°
15°
45°
90°

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