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Process Equipment and Plant Design

Process Equipment and Plant Design
At equal mass velocities, the values of film co-efficients for gases as compared to that for liquids are generally.

Unpredictable
Lower
Same
Higher

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Process Equipment and Plant Design
The LMTD correction factor (FT) is applied in __________ heat exchangers.

All multipass
1-1 cocurrent
Double pipe
All of these

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

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Process Equipment and Plant Design
Baffles are provided in a shell and tube heat exchanger to increase the turbulence and velocity of the shell side fluid. Which of the following shaped baffles does not fall in the category of transverse baffle?

Helical type baffle
Flat plate extending across the wall
Disk type baffle
Segmental baffle

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Process Equipment and Plant Design
In a distillation column, bubble caps are located on trays with a pitch of __________ times the outside diameter of the caps.

1.6 to 2
1.5 to 3
2.5
1.3 to 2

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Process Equipment and Plant Design
In case of saddle packing (e.g., berl and intralox saddles), the maximum size of the packing should not exceed __________ of the column diameter.

l/5th
l/30th
l/15th
l/50th

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