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Process Equipment and Plant Design

Process Equipment and Plant Design
For storing hazardous chemicals in large storage tanks, the minimum safe distance between the two tanks should range between __________ times the tank diameter.

1 to 1.5
6 to 8
4 to 5
2.5 to 3.5

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Process Equipment and Plant Design
Maximum size of the raschig rings used in a packed tower is about __________ of the coloumn diameter.

1/10th
1/50th
1/30th
1/20th

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Process Equipment and Plant Design
In packed towers provided with saddle packing, liquid redistributors are positioned at every __________ times column diameter or 6 metres whichever is less.

20-25
44119
43959
43864

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Process Equipment and Plant Design
A cylindrical storage tank can have a self supported conical roof,

Irrespective of its diameter
If the thickness of the roof is more than that of the cylindrical shell
If its diameter is more than 50 meters
If its diameter is less than 15-20metres

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Process Equipment and Plant Design
The minimum baffle height should be

Twice the tank diameter
Twice the impeller diameter
Equal to the impeller diameter
3/4 of the tank height

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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.

43835
20-40
100-150
1000-1500

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