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Process Equipment and Plant Design

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

Neither A nor B
Circumferential
Both A & B
Radial

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Process Equipment and Plant Design
For annular flow of a fluid, the ratio of the equivalent diameter for pressure drop calculation to the equivalent diameter for heat transfer calculation is

D1/(d1 + d2)
(d1 + d2)/d1
(d1 + d2)/d2
D2/(d1 + d2)

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Process Equipment and Plant Design
The slope of the feed line in distillation opeartion is given by (where, q = fraction of the feed stream that is liquid.)

-q
None of these
-q/(1-q)
-q/(q-1)

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Process Equipment and Plant Design
To keep the power input constant for a stirred vessel operating under fully developed turbulent flow conditions (constant power number), if the impeller diameter is increased by 20%, the impeller speed should be decreased by a factor of

(1.2)2/3
(1.2)5/3
(1.2)3/2
(1.2)3/5

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Process Equipment and Plant Design
In condenser, the cooling water is passed in the tube side in a pass arrangement, because

It makes condenser compact
It reduces heat transfer area
More thinner tubes can be used
Pressure drop is reduced

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Process Equipment and Plant Design
Movement of pipeline caused by thermal expansion is taken care by providing

Expansion joint
All of these
Changes in its direction
Change in the shape of pipeline

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