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Process Equipment and Plant Design

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

1/S₁.S₂
S₁.S₂
S₂/S₁
S₁/S₂

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Process Equipment and Plant Design
Needle valves are generally not used for

Very accurate flow control
High pressure throttling service
Smaller sizes of pipe
Very large diameter pipes

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Process Equipment and Plant Design
In perforated plate towers, the

Pressure drop is less compared is similar bubble cap towers
Hole sizes may be around 1/8" or 3/16"
Total hole area may be around 6 to 15% of tower cross-sectional area
All of these

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Process Equipment and Plant Design
Which of the following efficiencies can be greater than 100%?

Overall plate efficiency
Point efficiency
None of these
Murphree plate efficiency

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Process Equipment and Plant Design
The dust collection efficiency of electrostatic precipitator increases with increase in the

Both A & B
Electrode area
Gas flow rate
Neither A nor B

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Process Equipment and Plant Design
Rotary driers are most economically designed for the number of heat transfer units (HTU) from

0.01 to 1
5 to 10
1.5 to 2.5
10 to 20

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