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Process Equipment and Plant Design

Process Equipment and Plant Design
The equivalent diameter for fluid flow through a channel of constant non-circular cross section of area 'A' is given by (where, P = perimeter of the channel in contact with the fluid)

4 A/P
√A
4 P/A
A/P

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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 = 1.1 t
D = 1.5 t
D = 1.6 √t

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Process Equipment and Plant Design
Maximum allowable vapour velocity in a bubble cap tower is determined by the

Vapour density
Diameter of the column
None of these
Entrainment considerations

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Process Equipment and Plant Design
The minimum baffle height should be

Twice the tank diameter
3/4 of the tank height
Equal to the impeller diameter
Twice the impeller diameter

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Process Equipment and Plant Design
Thin spherical shells subjected to internal pressure, develop __________ stresses.

Radial
Circumferential
Neither A nor B
Both A & B

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Process Equipment and Plant Design
Normally, the length to diameter ratio of rotary dryers varies form 4 to 10 and for its economic operation, the number of transfer units (NTU) for such dryers varies from

44119
7.5-10.0
1.5-2.5
3.5-5.5

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