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Process Equipment and Plant Design

Process Equipment and Plant Design
In a distillation column, the minimum residence time for liquid in the downspout is about __________ seconds.

80
1
8
180

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Process Equipment and Plant Design
For storing hazardous chemicals in large storage tanks, the minimum safe distance between the two tanks should range between __________ times the tank diameter.

1 to 1.5
4 to 5
6 to 8
2.5 to 3.5

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Process Equipment and Plant Design
Value of Peclet number = ∞, is the representative of

Complete back mixing
Plug flow
Laminar flow
Eddy diffusivity = 0

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Process Equipment and Plant Design
__________ closure is the weakest enclosure for cylindrical vessels.

Hemispherical
Torispherical
Elliptical
Conical or flat plate

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Process Equipment and Plant Design
Joint efficiency (J) for a seamless pipe is

1
< 0.5
1.2
0.85

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Process Equipment and Plant Design
Hoop (circumferential) stress induced in a thin walled 'Horton Sphere' used for the storage of liquid ammonia under pressure is

pD/2t
pD/6t
pD/3t
pD/4t

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