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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 = 1.6 √t
D = 1.5 t
D = 3√t
D = 1.1 t

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Process Equipment and Plant Design
In distillation columns, bubble caps are held in place over trays by

Bolts
Both B and C
A hold down bar
Rivets

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Process Equipment and Plant Design
__________ heat exchanger is also known as 'hair pin type' exchanger,

Regenerative
Plate type
Double pipe
Finned

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Process Equipment and Plant Design
With increase in temperature drop (in a shell and tube heat exchanger), the LMTD correction factor, FT

Increases very rapidly
Increases linearly
Decreases very rapidly
Remains constant

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Process Equipment and Plant Design
Wall thickness of schedule 40 pipe as compared to that of schedule 80 pipe is

More
Same
Cither A or B; depends upon the I.D. of the pipe
Less

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Process Equipment and Plant Design
The most common standard size of bubble caps used in industrial operation is

6" dia cap with 4" dia riser
4" dia cap with 8" dia riser
1" dia cap with 0.5" dia riser
8" dia cap with 1" dia riser

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