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Process Equipment and Plant Design

Process Equipment and Plant Design
The stress developed in a material without any permanent set is called the

Breaking stress
Elastic limit
Yield stress
Ultimate stress

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Process Equipment and Plant Design
A single pass air heater is connected to a two pass unit. For the air flow rate and other conditions remaining the same, the film heat transfer co-efficient for air will vary in the ratio of

20.2
2
20.8
None of these

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Process Equipment and Plant Design
If a single tube pass heat exchanger is converted to two passes; for the same flow rate, the pressure drop per unit length in tube side will __________ times.

Increase by 21.6
Increase by 1.8
None of these
Decrease by 22

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Process Equipment and Plant Design
Heat transfer co-efficient for a horizontal condenser as compared to a vertical condenser operating under similar conditions is

Same
About 3 times
About 0.33 times
Less

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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

> 10
> 20
30
< 10

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Process Equipment and Plant Design
The wall thickness of thin cylindrical shell with hemispherical ends is __________ that of the spherical ends.

More than
Equal to
Either B or C; depends on maximum permissible internal pressure
Less than

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