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Process Equipment and Plant Design

Process Equipment and Plant Design
Holes of a sieve tray are arranged in triangular pitch of __________ times the hole diameter.

10 to 15
1.5 to 2
5 to 10
2.5 to 5

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Process Equipment and Plant Design
Needle valves are generally not used for

Smaller sizes of pipe
High pressure throttling service
Very accurate flow control
Very large diameter pipes

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Process Equipment and Plant Design
If 'D' is the inside diameter of the shell of a shell and tube heat exchanger, then the baffle spacing is usually in the range of

D/2 or minimum 2" to 5D
None of these
D/5 or minimum 2" to 5D
D/5 or minimum 2" to D

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Process Equipment and Plant Design
Liquid gradient over the tray results due to the

Large plate spacing
Large reflux ratio
Low gas velocity
Resistance offered to flow of liquids by caps & risers and the flow of gas

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Process Equipment and Plant Design
The thickness of segmental baffles (25 -35% cut truncated plates usually) is generally __________ the tube wall thickness.

Equal to
Four times
Half
Twice

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Process Equipment and Plant Design
Accidents in chemical plants are mostly due to

Inadequate equipment design
Failure of equipments
Improper layout of the equipments
Faulty operating procedures

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