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Process Equipment and Plant Design

Process Equipment and Plant Design
Le/D for fully open globe value may be around

10
75
300
25

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Process Equipment and Plant Design
Diameter of rivet hole (d, mm) and the plate thickness (t, mm) are related by Unwin's formula as

D = 3√t
D = 1.6 √t
D = 1.1 t
D = 1.5 t

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Process Equipment and Plant Design
In actual operation of distillation column, the vapour is not distributed uniformly among the bubble caps, primarily because of the

Liquid gradient on the tray
Lower static submergence
Lower skirt clearance
Small downcomer liquid seal

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Process Equipment and Plant Design
In a shell and tube heat exchanger, the 'tube pitch' is defined as the

Shortest distance between two adj acent tube holes
O.D. of the tube for square pitch
Shortest centre to centre distance between adjacent tubes
None of these

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Process Equipment and Plant Design
The units of Young's modulus of elasticity and __________ are the same.

Modular ratio
None of these
Stress
Strain

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

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

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