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Process Equipment and Plant Design

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

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

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Process Equipment and Plant Design
In packed towers provided with pall rings liquid redistributors are positioned at heights of every 6 metres or 5-10 times the column diameter, whichever is less. Maximum size of the pall rings should not exceed __________ of the column diameter.

1/2 to 1/4th
1/20-1/30th
1/5-1/10th
1/10-1/15th

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Process Equipment and Plant Design
Excessive liquid gradient on a tray may result in the

Gas blowing beneath cap skit
Back trapping
Maldistribution of gas
All of these

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Process Equipment and Plant Design
Hazards associated with the relief valve leakage for extremely hazardous material storage can be taken care of by providing

Dikes
Rupture diaphragm
Surge chamber
None of these

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Process Equipment and Plant Design
A shell may by termed as thin if its thickness to diameter ratio is less than 0.1. The factor which can be neglected in the calculation of membrane stresses is

Bending
Deformation
Shear
Elongation

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Process Equipment and Plant Design
Any shell opening greater than 5 cms for a storage tank must be reinforced for reason of

Preventing the local overstressing of the shell around the opening
Making the joint leak proof
None of these
Reduction of discontinuity in shape at the junction

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