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Process Equipment and Plant Design

Process Equipment and Plant Design
A single pass air heater is connected to a two pass unit. For the air flow rate and other conditions remaining the same, the film heat transfer co-efficient for air will vary in the ratio of

20.2
20.8
2
None of these

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

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

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Process Equipment and Plant Design
Multiple blade paddle agitator is used for mixing high viscosity liquids/paste in which the paddle diameter is commonly 0.8 times the tank diameter. However, the width of the blade is in the range of __________ times the paddle diameter.

0.3 to 0.5
0.65 to 0.80
0.5 to 0.6
0.1 to 0.25

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Process Equipment and Plant Design
Rate of filtrate delivery is inversely proportional to the

Cake & filter medium resistance
Viscosity of filtrate
Both A & B
Filtering area & the pressure difference driving force

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

1
8
80
180

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Process Equipment and Plant Design
The thickness of segmental baffles (25 -35% cut truncated plates usually) is generally __________ the tube wall thickness.

Half
Four times
Twice
Equal to

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