Chemical Engineering - Process Equipment and Plant Design

11. 

Minimum tube pitch recommended for shell and tube heat exchangers is about __________ times the outside diameter of the tube.

A. 1.25
B. 1.75
C. 2.5
D. 3.5

Answer: Option A

Explanation:

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12. 

Liquid redistribution should be done in a packed tower packed with raschig rings every 6 metres or __________ times the column diameter, whichever is lower.

A. 2.5-3.0
B. 5-7.5
C. 10-12.5
D. 15-20

Answer: Option A

Explanation:

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13. 

Slope of countercurrent flow rotary drier is in the range of __________ meter/metre.

A. 0 to 0.08
B. 0 to 0.8
C. 0 to 1.5
D. 0 to 2.2

Answer: Option A

Explanation:

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14. 

In case of saddle packing (e.g., berl and intralox saddles), the maximum size of the packing should not exceed __________ of the column diameter.

A. l/5th
B. l/15th
C. l/30th
D. l/50th

Answer: Option B

Explanation:

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15. 

Seamless pipe is made

A. from rolled strips formed into cylinders and seam-welded.
B. by extrusion & casting into static and centrifugal molds.
C. by forging a solid round, piercing it by simultaneously rotating & forcing it over a piercer point and further reducing it by rolling gas drawing.
D. both (b) and (c).

Answer: Option D

Explanation:

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