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Process Equipment and Plant Design

Process Equipment and Plant Design
__________ tray arrangement is recommended for distillation column having diameter upto 4 ft.

Radial flow
Cross flow
Cascade
Split flow

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

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

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Process Equipment and Plant Design
Tube wall thickness depends on the cor-rosiveness of the fluids and their operating pressure & temperature and is specified by Birmingham wire gauge (B.W.G)-a number which varies from 8 to 18 with the numbers 14 and 16 being more commonly used. Outside diameter of tubes varies from about 15 to 50 mm; however a tube of less than __________ mm outside diameter is generally not recommended for fouling fluids.

38
16
19
28

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Process Equipment and Plant Design
Generally, as the length of the liquid path on a tray is increased beyond 5 ft, the overall column efficiency

May increase or decrease depending upon the plate spacing
Increases
Decreases
Remains same

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Process Equipment and Plant Design
The shell side pressure drop in a shell and tube heat exchanger is maximum for __________ baffle.

Segmental
Disk and ring
Orifice
Independent of the type of

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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

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

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