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Process Equipment and Plant Design

Process Equipment and Plant Design
Larger depth of liquid on the trays of a distillation column

Results in higher pressure drop per tray
Both A & B
Leads to high tray efficiency
Neither A nor B

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Process Equipment and Plant Design
Steam economy is defined as the amount of evaporation per unit amount of steam used, while the capacity is the total evaporation obtained per hour. Use of multiple effect in evaporation

Increases capacity
Increases economy
Both B & C
Does not affect the capacity

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Process Equipment and Plant Design
Normal screwed fittings are used for pipes upto a diameter of __________ inches.

5
7
1.5
3

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Process Equipment and Plant Design
Ratio of tube length to shell diameter for a shell and tube heat exchanger is

< 4 : 1 for gas-gas exchangers
4 : 1 to 8 : 1 for liquid-liquid exchanger
8 : 1 to 12 : 1 for both liquid-liquid and gas-gas heat exchangers
Both B & C

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Process Equipment and Plant Design
The ratio of volumes of the mixed reactor to the plug flow reactor (for identical feed composition, flow rate, conversion, and for all positive reaction orders) is always

Equal to the order of reaction
>1
< 1
1

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Process Equipment and Plant Design
The absorption factor is defined as (where, S₁ = slope of the equilibrium curve, S₂ = slope of the operating line)

S₁/S₂
1/S₁.S₂
S₁.S₂
S₂/S₁

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