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Process Equipment and Plant Design

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 = 1.1 t
D = 3√t
D = 1.5 t
D = 1.6 √t

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Process Equipment and Plant Design
Minimum baffle spacing recommended in a shell and tube heat exchanger is equal to

I.D. of the shell
5 cms
40% of the I.D. of the shell
25 cms

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Process Equipment and Plant Design
In common bubble cap distillation column design practice, riser area is approximately equal to (where, Aa = Annular passage area, and Sa = Slot area)

Aa = 1.5 Sa
1.2 Aa = 1.2 Sa
Sa = 1.5 Aa
Aa = Sa

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Process Equipment and Plant Design
__________ shaped roof is most commonly used for cylindrical tanks.

Dome
Cone
Umbrella
Flat

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Process Equipment and Plant Design
Correct use of 'factor of safety' is very important in equipment design. It is defined as the ratio of the

Working stress to ultimate stress
None of these
Ultimate stress to working stress
Ultimate stress to breaking stress

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

300
10
75
25

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