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Process Equipment and Plant Design

Process Equipment and Plant Design
In a heat exchanger, shell side fluid velocity can be changed by changing the tube

Both A & B
Pitch
Layout
Neither A nor B

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Process Equipment and Plant Design
Generally, as the length of the liquid path on a tray is increased beyond 5 ft, the overall column efficiency

Decreases
Increases
May increase or decrease depending upon the plate spacing
Remains same

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Process Equipment and Plant Design
In packed towers provided with pall rings liquid redistributors are positioned at heights of every 6 metres or 5-10 times the column diameter, whichever is less. Maximum size of the pall rings should not exceed __________ of the column diameter.

1/20-1/30th
1/10-1/15th
1/5-1/10th
1/2 to 1/4th

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Process Equipment and Plant Design
Wall thickness of schedule 40 pipe as compared to that of schedule 80 pipe is

Same
More
Less
Cither A or B; depends upon the I.D. of the pipe

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Process Equipment and Plant Design
Which of the following is the most common type of baffle used in industrial shell and tube heat exchanger?

Orifice baffle
75% cut segmental baffle
25% cut segmental baffle
Disk and doughnut baffle

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Process Equipment and Plant Design
If a single tube pass heat exchanger is converted to two passes; for the same flow rate, the pressure drop per unit length in tube side will __________ times.

Increase by 1.8
Increase by 21.6
None of these
Decrease by 22

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