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Process Equipment and Plant Design

Process Equipment and Plant Design
Equivalent diameter for heat transfer calculation for a duct of square cross-section having each side as 'd' will be

√d
√(2d)
D
√(2πd)

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Process Equipment and Plant Design
The difficulty of liquid distribution in packed towers is accentuated, when the ratio of tower diameter to packing diameter is

< 7
> 7 < 15
< 30
> 20 < 50

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Process Equipment and Plant Design
In common bubble cap distillation column design practice, riser area is approximately equal to (where, Aa = Annular passage area, and Sa = Slot area)

Aa = 1.5 Sa
1.2 Aa = 1.2 Sa
Sa = 1.5 Aa
Aa = Sa

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Process Equipment and Plant Design
For laminar flow (NRe < 2100) in steel pipe, the optimum inside pipe diameter is given by

Di, opt = 3.9 Q0.45 . ρ0.23
Di, opt = 7.6 Q0.36 . ρ0.9
Di, opt = 3 Q0.36 ρ0.18
Di, opt = 3 Q0.36 . ρ1.86 μ0.08

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Process Equipment and Plant Design
Cylindrical pressure vessels in horizontal condition is generally supported on a __________ support.

Guy wire
Skirt
Saddle
Lug

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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?

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

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