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Process Equipment and Plant Design

Process Equipment and Plant Design
__________ head is the most economical for cylindrical vessels designed for operating at high pressure (> 15 atm.).

Ellipsoidal
Dished
Hemispherical
Conical

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Process Equipment and Plant Design
A perforated plate has holes of diameter dh arranged in a pitch ph. Each hole has a tube of I.D. dt passing through it. The ligament efficiency is given by

(ph - dh)/ph
(ph - dt)/ph
(ph - dh . dt/2)/ph
(ph - dh)/dh

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Process Equipment and Plant Design
In case of plain carbon steel, butt welded joints are used for shell plate thickness ≤ __________ cms. .

0.5
1.2
3.8
6.8

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Process Equipment and Plant Design
Elastic failure of a material occurs, when the tensile stress equals yield strength, yield point or the elastic limit. Also, the elastic failure occurs according to maximum strain theory, when the maximum tensile strain equals (where, σ = yield strength and E = modulus of elasticity)

E
Σ
Σ/E
E/σ

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Process Equipment and Plant Design
Movement of pipeline caused by thermal expansion is taken care by providing

Expansion joint
Changes in its direction
All of these
Change in the shape of pipeline

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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
S₁/S₂
1/S₁.S₂

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