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Process Equipment and Plant Design

Process Equipment and Plant Design
Low pressure steam (with saturation temperature between 105 to 120°C) is usually used in the vacuum evaporators, which normally employ a vacuum of about __________ mm Hg (referred to a 760 mm mercury barometer).

450
650
750
250

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Process Equipment and Plant Design
The optimum size ratio for two mixed reactors in series depends on the kinetics of the reaction and the conversion level. For reaction orders more than one, the

Smaller reactor should come first
Larger reactor should come first
Equal sized reactors are the best
None of these

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Process Equipment and Plant Design
Fouling factor must be included in the calculation of over all design heat transfer coefficient, when the liquid

Is highly viscous
Containing suspended solids flows at high velocity
Is of high specific gravity
Containing suspended solids flows at low velocity

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Process Equipment and Plant Design
Safety valves are provided in chemical equipments to guard against excessive

Noise
Pressure/pressure fluctuation
Temperature
Turbulence

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Process Equipment and Plant Design
In a distillation column, minimum clearance to be maintained betweeen the overflow weir and the last row of the bubble caps is __________ cms.

7.5
20
2.5
15

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Process Equipment and Plant Design
Saddle supports are used for supporting __________ vessels.

Tall vertical
Thick spherical
Horizontal cylinderical
Thick walled vertical

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