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Process Equipment and Plant Design

Process Equipment and Plant Design
The minimum plate spacing in most of the pertroleum refinery distillation columns (of dia > 3 ft) is normally __________ inches.

12
34
6
18

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Process Equipment and Plant Design
Which of the following is the most common type of baffle used in industrial shell and tube heat exchanger?

75% cut segmental baffle
Disk and doughnut baffle
Orifice baffle
25% cut segmental baffle

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Process Equipment and Plant Design
Le/D for 90° elbow (medium radius) and 90°square elbow would be respectively around

250 and 600
100 and 250
3 and 5
25 and 60

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Process Equipment and Plant Design
Steam economy is defined as the amount of evaporation per unit amount of steam used, while the capacity is the total evaporation obtained per hour. Use of multiple effect in evaporation

Both B & C
Increases capacity
Increases economy
Does not affect the capacity

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Process Equipment and Plant Design
Stage efficiency for packed tower varies with the

Type & size of packing
All of these
Operating pressure and column diameter
Fluid rates and fluid properties

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Process Equipment and Plant Design
The ratio of shear stress to shear strain is called

Shear modulus
Modulus of elasticity
Bulk modulus
Modulus of rigidity

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