PROCESS EQUIPMENT AND PLANT DESIGN QUIZ

The ratio of linear stress to linear strain is termed as the

Bulk modulus

Modulus of rigidity

Modulus of elasticity

None of these

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__________ liquor is best handled in a long tube vertical evaporator.

Salting

Foamy

Scaling

Viscous

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Le/D for a Tee (used as elbow, entering run) would be around

200

60

5

350

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The slope of operating line in the rectifying section of a distillation column is unity, if the reflux ratio is

∞

1

Minimum

0

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In distillation columns, bubble caps are held in place over trays by

Both B and C

Bolts

Rivets

A hold down bar

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The clearance between two tubes in a shell and tube heat exchanger is known as 'ligament', whose minimum value is __________ the outside diameter of the tube, but in no case it should be less than 4.5 mm.

One fourth

Three fourth

Half

Equal to

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Maximum size of the raschig rings used in a packed tower is about __________ of the coloumn diameter.

1/50th

1/30th

1/10th

1/20th

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Pick out the wrong statement pertaining to the design of a basket type evaporator.

Downtake is formed by the annular space between the bundle and the shell

The tube bundle is suspended on bracket

There is no central downtake

It is used for high viscosity liquor having large rate of scaling

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The length of straight rectangular weir used on cross-flow trays is generally __________ the column diameter.

0.6-0.8 times

Twice

Equal to

2 ft irrespective of (for column > 3 ft diameter)

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Accidents in chemical plants are mostly due to

Faulty operating procedures

Improper layout of the equipments

Failure of equipments

Inadequate equipment design

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