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Process Equipment and Plant Design

Process Equipment and Plant Design
Le/D for fully open globe value may be around

300
10
75
25

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Process Equipment and Plant Design
Shell side heat transfer co-efficient in case of square pitch as compared to the triangular pitch under similar condition of fluid flow and tube size is

Same
More
Less
Twice

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Process Equipment and Plant Design
The length of straight rectangular weir used on cross-flow trays is generally __________ the column diameter.

Equal to
Twice
2 ft irrespective of (for column > 3 ft diameter)
0.6-0.8 times

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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.

43929
17-34
88-105
52-68

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Process Equipment and Plant Design
Optimum economic pipe diameter for fluid flow is determined by the

Viscosity of the fluid
Density of the fluid
None of these
Total cost considerations (pumping cost plus fixed cost of the pipe)

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Process Equipment and Plant Design
The ends of a cylinderical vessel can be closed by a head, which can be one of the four shapes. For the same thickness, choose the one which can withstand the highest pressure.

Torispherical
Ellipsoidal
Hemispherical
Flat plate

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