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Process Equipment and Plant Design

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

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

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Process Equipment and Plant Design
__________ tower is the most suitable gas-liquid contacting device involving highly corrosive fluids.

Sieve plate
None of these
Bubble cap plate
Packed

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Process Equipment and Plant Design
Back-trapping in a distillation column results due to

Low gas velocity
Low reflux ratio
Excessive liquid gradient over the tray
High gas velocity

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Process Equipment and Plant Design
For pipe flows, head is proportional to __________ at constant capacity (where D = pipe diameter ).

D²
1/D²
1/D
1/D⁵

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Process Equipment and Plant Design
The ratio of shear stress to shear strain is called

Modulus of elasticity
Bulk modulus
Modulus of rigidity
Shear modulus

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Process Equipment and Plant Design
The distance between the top of the slots and the liquid surface when the static liquid is just ready to flow over the overflow weir is called

Static submergence
None of these
Downcomer liquid seal
Skirt clearance

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