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Process Equipment and Plant Design

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
0.3
0.95
0.75

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Process Equipment and Plant Design
Baffle spacing is generally __________ the I.D. of the shell.

Both B and C
Not less than one fifth of
More than
Not greater than

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Process Equipment and Plant Design
Tubes are fixed to the tube sheet (a thick circular metallic plate) by the method of tube rolling and brazing (non-removable) or ferrule connection (removable). Thickness of the tube, sheet is normally __________ the outside diameter of the tube but in no case it should be less than 22 mm (7/8").

Half
Equal to
Three fourth
1.5 times

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Process Equipment and Plant Design
Which of the following is the best tube material from thermal conductivity point of view alone?

Aluminium
Copper
Stainless steel
Carbon steel

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Process Equipment and Plant Design
The minimum baffle height should be

Equal to the impeller diameter
Twice the impeller diameter
Twice the tank diameter
3/4 of the tank height

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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.

Same
Unpredictable
Higher
Lower

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