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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).

650
250
750
450

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Process Equipment and Plant Design
An underdesigned steam trap will

Back up condensate and cause water hammer in steam line
None of these
Waste steam
Destroy itself of acceleration wear due to rapid recycling

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Process Equipment and Plant Design
A/an __________ is used for changing the direction of a pipeline.

Elbow
Flange
Union
Disc compensator

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Process Equipment and Plant Design
Steam is preferred to be used as a heating medium in heat exchangers, because of its

Low cost
Non-corrosive condensate
High film co-efficient
High latent heat

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Process Equipment and Plant Design
In case of a continuous distillation column, increase in reflux ratio may result in the

Lower fixed charges for the column
Greater cost for the reboiler heat supply
All of these
Greater cost for the condenser coolant

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Process Equipment and Plant Design
Wall thickness of schedule 40 pipe as compared to that of schedule 80 pipe is

Cither A or B; depends upon the I.D. of the pipe
Same
Less
More

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