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Process Equipment and Plant Design

Process Equipment and Plant Design
Commercial packed scrubbers are normally designed for a pressure drop range of __________ mm water coloumn per metre of packed height.

88-105
52-68
17-34
43929

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Process Equipment and Plant Design
Hole diameter of the seive trays in the distillation column ranges from __________ mm.

L to 3
3 to 12.5
12.5 to 18.5
4 to 8

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Process Equipment and Plant Design
Length to diameter ratio of most rotary driers is in the range of

1 to 2
4 to 10
10 to 20
20 to 30

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Process Equipment and Plant Design
In case of a shell and tube heat exchanger, the effect of L/D on inside film heat transfer co-efficient (hi) vanishes after a Reynold number of

1000
10000
5000
3000

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Process Equipment and Plant Design
An underdesigned steam trap will

Back up condensate and cause water hammer in steam line
None of these
Waste steam
Destroy itself of acceleration wear due to rapid recycling

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Process Equipment and Plant Design
The wall thickness for a large high pressure pipeline is determined by the consideration of the

Circumferential pipewall tension
Temperature stresses
Axial tensile stress in the pipe
Forces exerted by static and dynamic action at bends

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