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Process Equipment and Plant Design

Process Equipment and Plant Design
The safe distance of habitation from a hazardous chemical plant (TLV of its product < 1000 ppm) should be about __________ kms.

15
1
5
25

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Process Equipment and Plant Design
Corrosion allowance in the design of pressure vessel/chemical equipment is not necessary, if

Plain carbon steel and cast iron parts are used
Both B & C
Material of construction is high alloy steel
Wall thickness is > 30 mm

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Process Equipment and Plant Design
The diameter of a propeller agitator used in agitation tank ranges from __________ percent of the tank diameter and its peripherial speed is normally 300 to 500 metres/minute.

55 to 75
15 to 30
40 to 50
5 to 10

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Process Equipment and Plant Design
Generally, as the length of the liquid path on a tray is increased beyond 5 ft, the overall column efficiency

Decreases
Remains same
Increases
May increase or decrease depending upon the plate spacing

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Process Equipment and Plant Design
__________ dished head is the strongest of all.

None of these
Torispherical
Hemispherical
Elliptical

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Process Equipment and Plant Design
In the downcomer of a distillation column, the minimum recommended residence time is about __________ seconds.

17.5
12.5
2.5
5

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