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Process Equipment and Plant Design

Process Equipment and Plant Design
At equal mass velocities, the values of film co-efficients for gases as compared to that for liquids are generally.

Higher
Unpredictable
Lower
Same

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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

Deformation
Shear
Elongation
Bending

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Process Equipment and Plant Design
A high vapour velocity is required for high plate efficiency in a seive plate coloumn. The satisfactory value of operating vapor velocity for design purpose in seive plate column is about __________ percent of the flooding velocity.

80
95
60
45

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Process Equipment and Plant Design
What is the slope of the operating line in the rectifying section of a distillation coloumn?

∞
> 1

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Process Equipment and Plant Design
Hold up of material in a operating rotary drier is in the range of

0.5 to 0.8
0.25 to 0.50
0.05 to 0.15
0.8 to 0.9

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Process Equipment and Plant Design
Which of the following factors determine the amount of entrainment in a distillation column?

All of these
Plate spacing
Depth of liquid above the bubble cap slots
Vapour velocity in the volume between the plates

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