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Process Equipment and Plant Design

Process Equipment and Plant Design
In a distillation column, the minimum residence time for liquid in the downspout is about __________ seconds.

80
8
1
180

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Process Equipment and Plant Design
If 'D' is the inside diameter of the shell of a shell and tube heat exchanger, then the baffle spacing is usually in the range of

D/2 or minimum 2" to 5D
None of these
D/5 or minimum 2" to 5D
D/5 or minimum 2" to D

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Process Equipment and Plant Design
Le/D for fully open gate valves would be

Both B and C
Much more than that for fully open globe valves
Much less (say 2% than that for fully open globe valves)
Around 7

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Process Equipment and Plant Design
LMTD correction factor is used in heat exchanger design for

Double pipe heat exchanger
Fouling fluids
Counter flow of hot and cold fluids
Multipass shell and tube heat exchanger

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Process Equipment and Plant Design
Normal screwed fittings are used for pipes upto a diameter of __________ inches.

1.5
7
5
3

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Process Equipment and Plant Design
A minimum clearance of about __________ mm is maintained between the distillation column wall and the bubble cap.

19
38
95
76

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