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Process Equipment and Plant Design

Process Equipment and Plant Design
The minimum shell thickness for tank ≤ 15 metres diameter is limited to __________ mm, for reasons of elastic stability.

15
5
2
10

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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)

Σ/E
Σ
E
E/σ

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Process Equipment and Plant Design
Width and depth of grooves in the tube sheet holes normally are __________ inch respectively.

1/2 and 8
1/2 and 5
1/64 and 1/8
1/8 and 1/64

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Process Equipment and Plant Design
The minimum tray spacing in distillation column of diameter less than 3 ft is normally __________ inches.

34
6
24
18

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Process Equipment and Plant Design
In case of a 'thin' pressure vessel, the ratio of its diameter to wall thickness is

< 10
> 20
> 10
30

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Process Equipment and Plant Design
The raio, (properller agitator dia/tank dia) is normally taken as

0.5-0.65
0.60-0.90
0.15-030
0.75-0.85

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