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Process Equipment and Plant Design

Process Equipment and Plant Design
Bubble cap diameter used for the distillation column having diameter ranging from 1.5 to 4.5 metres is about __________ mm.

100
10
50
150

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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 = 1.6 √t
D = 1.5 t
D = 1.1 t
D = 3√t

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Process Equipment and Plant Design
Excessive liquid gradient on a tray may result in the

Gas blowing beneath cap skit
All of these
Back trapping
Maldistribution of gas

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Process Equipment and Plant Design
Liquid redistribution should be done in a packed tower packed with raschig rings every 6 metres or __________ times the column diameter, whichever is lower.

5-7.5
15-20
10-12.5
2.5-3.0

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Process Equipment and Plant Design
The ratio of shear stress to shear strain is called

Modulus of rigidity
Modulus of elasticity
Bulk modulus
Shear modulus

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Process Equipment and Plant Design
Holes of a sieve tray are arranged in triangular pitch of __________ times the hole diameter.

5 to 10
2.5 to 5
1.5 to 2
10 to 15

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