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Process Equipment and Plant Design

Process Equipment and Plant Design
In packed towers provided with saddle packing, liquid redistributors are positioned at every __________ times column diameter or 6 metres whichever is less.

20-25
43864
44119
43959

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Process Equipment and Plant Design
Friction factor for turbulent flow in a new pipe is given by

f = 25/NRe
f = 16/NRe
f = 0.22 NRe0.05
f = 0.04/NRe0.16

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Process Equipment and Plant Design
Shortest distance between two tubes is

Called tube pitch
Called tube clearance
None of these
More in case of triangular pitch as compared to square pitch of tube layout

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Process Equipment and Plant Design
The ratio of tube length to shell diameter in case of liquid shell and tube heat exchanger ranges from

6 to 12
3 to 5
4 to 8
2 to 3

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Process Equipment and Plant Design
Tubes are fixed to the tube sheet (a thick circular metallic plate) by the method of tube rolling and brazing (non-removable) or ferrule connection (removable). Thickness of the tube, sheet is normally __________ the outside diameter of the tube but in no case it should be less than 22 mm (7/8").

Three fourth
Equal to
Half
1.5 times

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Process Equipment and Plant Design
Pressure drop (Δp) and the superficial gas mass velocity (G) in case of packed absorption tower operating in the preloading range are related as

Δp = 1/G0.6
Δp = G2
Δp = G0.5
Δp = G

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