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Process Equipment and Plant Design

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

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

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Process Equipment and Plant Design
An increase in the liquid resistance to interphase mass transfer and a resultant reduction in plate efficiency is caused by

All of these
An increase in relatived volatility for rectification columns
An increase in liquid viscosity
Decrease in gas solubility for absorbers

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Process Equipment and Plant Design
Which of the following packing materials provides for maximum mass transfer?

Raschig rings
All of these
Cross-partition rings
Lessig rings

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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

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

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Process Equipment and Plant Design
The stress developed in a material without any permanent set is called the

Yield stress
Ultimate stress
Breaking stress
Elastic limit

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Process Equipment and Plant Design
Friction factor for turbulent flow in a new pipe is given by

f = 0.04/NRe0.16
f = 0.22 NRe0.05
f = 25/NRe
f = 16/NRe

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