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Process Equipment and Plant Design

Process Equipment and Plant Design
The operating pressure drop range in a bag filter is about __________ mm water gauge.

50-150
500-1500
43961
1500-2500

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Process Equipment and Plant Design
In condenser, the cooling water is passed in the tube side in a pass arrangement, because

Pressure drop is reduced
More thinner tubes can be used
It reduces heat transfer area
It makes condenser compact

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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.

Higher
Same
Unpredictable
Lower

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Process Equipment and Plant Design
Normally, the ratio of the total riser area to the tower cross sectional area (for bubble cap towers of diameter more than 3 ft) is around

0.35-0.75
0.4-0.6
0.1-0.2
0.55-0.85

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Process Equipment and Plant Design
In seive plate column, holes are drilled or punched in sizes ranging from 2.5 to 12 mm (5 mm being widely used). The hole pitch is normally __________ times the hole diameter to give the required hole area.

5 to 10
10 to 15
2.5 to 4.0
0.5 to 1.5

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Process Equipment and Plant Design
To keep the power input constant for a stirred vessel operating under fully developed turbulent flow conditions (constant power number), if the impeller diameter is increased by 20%, the impeller speed should be decreased by a factor of

(1.2)5/3
(1.2)3/5
(1.2)2/3
(1.2)3/2

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