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Process Equipment and Plant Design

Process Equipment and Plant Design
Which of the following is the best tube material from thermal conductivity point of view alone?

Aluminium
Stainless steel
Carbon steel
Copper

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Process Equipment and Plant Design
The operating velocity in the absorption tower is usually 40-50% of the flooding velocity. Packed absorption towers are normally designed for a pressure drop of about __________ mm of water column per metre height of packing.

20-40
43835
1000-1500
100-150

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Process Equipment and Plant Design
In most of the shell and tube heat exchangers, the tube pitch is generally __________ the tube diameter.

Less than
2.5 times
1.25-1.50 times
One-fourth of

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Process Equipment and Plant Design
Length to diameter ratio of most rotary driers is in the range of

4 to 10
1 to 2
20 to 30
10 to 20

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Process Equipment and Plant Design
__________ closure is the weakest enclosure for cylindrical vessels.

Hemispherical
Conical or flat plate
Torispherical
Elliptical

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Process Equipment and Plant Design
In a distillation column, the minimum residence time for liquid in the downspout is about __________ seconds.

8
1
80
180

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