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Process Equipment and Plant Design

Process Equipment and Plant Design
The slope of operating line in the rectifying section of a distillation column is unity, if the reflux ratio is

1
Minimum
0
∞

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Process Equipment and Plant Design
In a double pipe concentric heat exchanger, the equivalent diameter of annulus for heat transfer would be (where, D₁ and D₂ are I.D. of inner and outer pipes)

(D₂² - D₁²)/D₂²
(D₂² - D₁²)/D₁²
None of these
D₂ - D₁

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Process Equipment and Plant Design
__________ of water makes it a widely used coolant in heat exchangers.

High specific heat
Low corrosiveness
Low dirt factor
Low viscosity

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Process Equipment and Plant Design
A binary liquid azeotropic mixture has boiling point higher than either of the components, when it shows __________ deviation from Raoult's Law.

Positive
Negative
None of these
No

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Process Equipment and Plant Design
The longitudinal stress induced in a thin walled cylinderical vessel under internal pressure is

pd/2t
pd/4t
pd/8t
pd/t

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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 = 0.04/NRe0.16
f = 16/NRe

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