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Process Equipment and Plant Design

Process Equipment and Plant Design
The type of stress developed in a metallic bar on subjecting it to a change in temperature without allowing it to be deformed is __________ stress.

Tensile
Thermal
Shear
Compressive

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Process Equipment and Plant Design
Reflux ratio variation in a distillation column is between

Zero and infinity
None of these
Minimum and infinity
Zero and one

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Process Equipment and Plant Design
Stage efficiency for packed tower varies with the

Operating pressure and column diameter
Type & size of packing
All of these
Fluid rates and fluid properties

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Process Equipment and Plant Design
A minimum clearance of about __________ mm is maintained between the distillation column wall and the bubble cap.

76
38
95
19

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Process Equipment and Plant Design
Optimum reflux ratio in a continuous distillation column is determined by the

Flooding limit of the column
None of these
Maximum permissible vapour velocity
Total cost consideration (fixed cost of the column plus the cooling water & steam cost)

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Process Equipment and Plant Design
Angled baffles are preferred in the agitation tank to control the swirling action; if the viscosity of the liquid to be mixed is about 200 poise. However, the baffle may be completely eliminated for mixing liquids having viscoisty above __________ poise.

1500
300
1000
600

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