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Process Equipment and Plant Design

Process Equipment and Plant Design
The force due to wind load acting on a tall vessel depends upon its

Outside diameter
All of these
Height
Shape

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Process Equipment and Plant Design
In a distillation column, bubble caps are located on trays with a pitch of __________ times the outside diameter of the caps.

1.5 to 3
2.5
1.3 to 2
1.6 to 2

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Process Equipment and Plant Design
With increase in the reflux ratio for a fixed production from a continuous binary distillation column, the __________ decreases.

Vapour & liquid load both
Running cost of cooling water for condenser
Running cost of steam for reboiler
Fixed charges initially

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Process Equipment and Plant Design
Baffles may be eliminated for

Large diameter tanks
Low viscosity liquids (< 200 poise)
High viscosity liquids (> 600 poise)
None of these

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Process Equipment and Plant Design
To keep the power input constant for a stirred vessel operating under fully developed turbulent flow conditions (constant power number), if the impeller diameter is increased by 20%, the impeller speed should be decreased by a factor of

(1.2)3/2
(1.2)5/3
(1.2)2/3
(1.2)3/5

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Process Equipment and Plant Design
Correct use of 'factor of safety' is very important in equipment design. It is defined as the ratio of the

None of these
Ultimate stress to breaking stress
Ultimate stress to working stress
Working stress to ultimate stress

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