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Process Equipment and Plant Design

Process Equipment and Plant Design
Apex angle of conical heads used in the bottom heads of chemical process equipments is usually

60°
30°
45°
75°

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Process Equipment and Plant Design
The thermal stress in a metallic bar does not depend upon the

Cross-sectional area
Neither A nor B
Both A & B
Changes in temperature

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Process Equipment and Plant Design
__________ head is the most economical for cylindrical vessels designed for operating at high pressure (> 15 atm.).

Conical
Dished
Hemispherical
Ellipsoidal

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Process Equipment and Plant Design
A pressure vessel is said to be made of 'thick' shell, if the ratio of its diameter to wall thickness is

10
10
20
20

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Process Equipment and Plant Design
Log mean temperature difference in case of multi-pass shell and tube heat exchanger is always

More than arithmetic mean value
Both B & C
Less than arithmetic mean value
More than geometric mean value

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Process Equipment and Plant Design
In perforated plate towers, the

Total hole area may be around 6 to 15% of tower cross-sectional area
Hole sizes may be around 1/8" or 3/16"
Pressure drop is less compared is similar bubble cap towers
All of these

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