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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.

18
12
6
34

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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.

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

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Process Equipment and Plant Design
Slope of countercurrent flow rotary drier is in the range of __________ meter/metre.

0 to 2.2
0 to 0.08
0 to 1.5
0 to 0.8

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Process Equipment and Plant Design
The main purpose of providing stepping on the trays is to

Decrease the pressure drop
Facilitate handling of large flow rate of liquid
Improve the flow condition
Increase the residence time

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Process Equipment and Plant Design
The average velocity in the tubes of a 1-4 heat exchanger is __________ times that in 1-1 heat exchanger having the same size & number of tubes and operated at same liquid flow rate.

43834
43832
4
2

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Process Equipment and Plant Design
Which of the following is used to set the diameter of the distillation column?

Length of straight rectangular weir on cross-flow tray
Allowable vapour velocity
Static submergence
Number of theorectical plates

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