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Process Equipment and Plant Design

Process Equipment and Plant Design
Back-trapping in a distillation column results due to

Excessive liquid gradient over the tray
Low gas velocity
High gas velocity
Low reflux ratio

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Process Equipment and Plant Design
A binary liquid azeotropic mixture has boiling point higher than either of the components, when it shows __________ deviation from Raoult's Law.

Positive
No
None of these
Negative

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Process Equipment and Plant Design
Safety valves are provided in chemical equipments to guard against excessive

Turbulence
Temperature
Pressure/pressure fluctuation
Noise

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Process Equipment and Plant Design
Which of the following packing materials provides for maximum mass transfer?

Lessig rings
Raschig rings
Cross-partition rings
All of these

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Process Equipment and Plant Design
In a thin cylindrical shell, the hoop stress is __________ stress.

Compressive
Longitudinal
Radial
Circumferential tensile

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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.).

Hemispherical
Conical
Ellipsoidal
Dished

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