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Process Equipment and Plant Design

Process Equipment and Plant Design
Steam side heat transfer co-efficient for design consideration under ordinary condition can be assumed to be about __________ kcal/hr.m².°C.

2500
1250
7500
15000

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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
Σ/E
E

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Process Equipment and Plant Design
A pressure vessel is said to be made of 'thick' shell, if the ratio of its diameter to wall thickness is

10
20
10
20

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Process Equipment and Plant Design
In chemical process equipments, the conical bottom heads used, usually has an apex angle of

80°
60°
40°
20°

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Process Equipment and Plant Design
The main purpose of providing stepping on the trays is to

Increase the residence time
Improve the flow condition
Facilitate handling of large flow rate of liquid
Decrease the pressure drop

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Process Equipment and Plant Design
The longitudinal stress induced in a thin walled cylinderical vessel under internal pressure is

pd/t
pd/2t
pd/4t
pd/8t

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