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Process Equipment and Plant Design

Process Equipment and Plant Design
Diameter of bubble caps used in high pressure columns is __________ as compared to that used in identical vacuum columns.

Either A or B; no generalisation can be made
Less
More
Same

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Process Equipment and Plant Design
Le/D for 90° elbow (medium radius) and 90°square elbow would be respectively around

100 and 250
3 and 5
25 and 60
250 and 600

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

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

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Process Equipment and Plant Design
In most of the shell and tube heat exchangers, the tube pitch is generally __________ the tube diameter.

Less than
2.5 times
One-fourth of
1.25-1.50 times

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Process Equipment and Plant Design
The ratio of linear stress to linear strain is termed as the

Modulus of elasticity
None of these
Modulus of rigidity
Bulk modulus

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Process Equipment and Plant Design
A perforated plate has holes of diameter dh arranged in a pitch ph. Each hole has a tube of I.D. dt passing through it. The ligament efficiency is given by

(ph - dt)/ph
(ph - dh)/dh
(ph - dh)/ph
(ph - dh . dt/2)/ph

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