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Process Equipment and Plant Design

Process Equipment and Plant Design
Hoop (circumferential) stress induced in a thin walled 'Horton Sphere' used for the storage of liquid ammonia under pressure is

pD/2t
pD/3t
pD/6t
pD/4t

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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.

Allowable
Working
Damaging
None of these

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Process Equipment and Plant Design
Poisson's ratio of a material is the ratio of unit lateral strain to the unit axial elongation within its elastic limit. The value of Poisson's ratio for structural and pressure vessel steel may be taken as

0.01
0.75
0.3
0.95

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Process Equipment and Plant Design
The most common standard size of bubble caps used in industrial operation is

6" dia cap with 4" dia riser
1" dia cap with 0.5" dia riser
8" dia cap with 1" dia riser
4" dia cap with 8" dia riser

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Process Equipment and Plant Design
In common bubble cap distillation column design practice, riser area is approximately equal to (where, Aa = Annular passage area, and Sa = Slot area)

Sa = 1.5 Aa
1.2 Aa = 1.2 Sa
Aa = Sa
Aa = 1.5 Sa

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Process Equipment and Plant Design
A rivetted joint does not fail by __________ of rivets.

None of these
Shearing
Tearing
Tearing of the plate across a row

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