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Process Equipment and Plant Design

Process Equipment and Plant Design
Friction factor for turbulent flow in a new pipe is given by

f = 0.22 NRe0.05
f = 25/NRe
f = 16/NRe
f = 0.04/NRe0.16

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

Bulk modulus
Modulus of rigidity
Modulus of elasticity
Shear modulus

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

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

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Process Equipment and Plant Design
Thin spherical shells subjected to internal pressure, develop __________ stresses.

Neither A nor B
Both A & B
Circumferential
Radial

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Process Equipment and Plant Design
What is the slope of the feed line, if the feed to a distillation column is a saturated liquid?

∞
> 1
< 1

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Process Equipment and Plant Design
In a distillation column, bubble caps are located on trays with a pitch of __________ times the outside diameter of the caps.

1.5 to 3
1.6 to 2
2.5
1.3 to 2

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