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Process Equipment and Plant Design

Process Equipment and Plant Design
In the design of a paddle agitator, the ratio (paddle dia/tank dia) is normally taken as

0.5
0.25
0.8
0.1

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Process Equipment and Plant Design
The design stress, which is more than the damaging stress, is the least unit stress that will render a member unfit for service before the end of its normal life. The design stress factor or factor of safety indicates the margin between design stress and the __________ stress.

Working
Damaging
None of these
Allowable

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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)

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

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Process Equipment and Plant Design
In a shell and tube heat exchanger, the 'tube pitch' is defined as the

Shortest centre to centre distance between adjacent tubes
None of these
Shortest distance between two adj acent tube holes
O.D. of the tube for square pitch

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Process Equipment and Plant Design
In case of 1.5" heat exchanger tubes, the inside flow area __________ with decrease in BWG.

Increases
Remains same
Decreases
None of these

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

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

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