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Process Equipment and Plant Design

Process Equipment and Plant Design
Minimum baffle spacing recommended in a shell and tube heat exchanger is equal to

I.D. of the shell
25 cms
40% of the I.D. of the shell
5 cms

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Process Equipment and Plant Design
What is the minimum recommended ligament for square pitch arrangement in case of heat exchangers?

Equal to tube I.D
Equal to tube O.D
6.5 mm
6.5 cms

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Process Equipment and Plant Design
Holes of a sieve tray are arranged in triangular pitch of __________ times the hole diameter.

10 to 15
1.5 to 2
5 to 10
2.5 to 5

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Process Equipment and Plant Design
With increase in temperature drop (in a shell and tube heat exchanger), the LMTD correction factor, FT

Increases very rapidly
Remains constant
Increases linearly
Decreases very rapidly

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Process Equipment and Plant Design
In a rotary drier, the average retention time of solid is(where Z = length of the drier, metres ρ = apparent solid density, kg/m³ L = flow rate of dry solids, kg/see. m² drier cross-section H = hold up of solid.)

L/Z.H.ρ
Z.H.ρ/L
Z.H/L.ρ
H.ρ/L

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Process Equipment and Plant Design
Lap joints are preferred for plates having thickness __________ mm.

43961
< 12.5
> 5
> 3

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