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Process Equipment and Plant Design

Process Equipment and Plant Design
In most of the shell and tube heat exchangers, the tube pitch is generally __________ the tube diameter.

One-fourth of
Less than
2.5 times
1.25-1.50 times

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Process Equipment and Plant Design
The units of Young's modulus of elasticity and __________ are the same.

Modular ratio
Stress
Strain
None of these

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Process Equipment and Plant Design
Rotary driers are most economically designed for the number of heat transfer units (HTU) from

5 to 10
0.01 to 1
1.5 to 2.5
10 to 20

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Process Equipment and Plant Design
In case of a 'thin' pressure vessel, the ratio of its diameter to wall thickness is

> 20
30
< 10
> 10

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Process Equipment and Plant Design
With increase in the number of shell passes, the value of FT

Decreases
Remains same, only if the number of tube passes does not change
Increases
Remains same

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Process Equipment and Plant Design
Low pressure steam (with saturation temperature between 105 to 120°C) is usually used in the vacuum evaporators, which normally employ a vacuum of about __________ mm Hg (referred to a 760 mm mercury barometer).

650
450
250
750

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