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Process Equipment and Plant Design

Process Equipment and Plant Design
Removable connection of tubes to tube sheet is called

Saddle
Ferrule
Socket
Nipple

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Process Equipment and Plant Design
Optimum reflux ratio in a continuous distillation column is determined by the

Flooding limit of the column
Maximum permissible vapour velocity
Total cost consideration (fixed cost of the column plus the cooling water & steam cost)
None of these

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

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

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Process Equipment and Plant Design
A cylinderical pressure vessel of volume 6 πm³ has to be designed to withstand a maximum internal pressure of 10 atm. The allowable design stress of the material is 125N/mm² and corrosion allowance is 2 mm. The thickness of the vessel for a length/diameter ratio of 3 will be close to

10 mm
8 mm
5 mm
6 mm

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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.

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

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Process Equipment and Plant Design
For pipe flows, head is proportional to __________ at constant capacity (where D = pipe diameter ).

1/D⁵
1/D
1/D²
D²

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