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Process Equipment and Plant Design

Process Equipment and Plant Design
In hydrostatic testing of welded pipe (for leakage, strength etc.) the ratio of minimum hydrostatic test pressure to internal design pressure is around

3.5
1.5
2.5
0.5

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Process Equipment and Plant Design
Le/D for a Tee (used as elbow, entering branch) would be

Less than that for Tee (used as elbow, entering run)
Around 90
Both B and C
More than that for Tee (used as elbow, entering run)

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Process Equipment and Plant Design
Bubble cap diameter used for the distillation column having diameter ranging from 1.5 to 4.5 metres is about __________ mm.

150
10
50
100

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Process Equipment and Plant Design
Back-trapping in a distillation column results due to

High gas velocity
Low reflux ratio
Low gas velocity
Excessive liquid gradient over the tray

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Process Equipment and Plant Design
The ratio of tube length to shell diameter in case of liquid shell and tube heat exchanger ranges from

4 to 8
2 to 3
3 to 5
6 to 12

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Process Equipment and Plant Design
In the agitators, the power required will be changed with the increase of diameter of agitator (D) as

D⁵
D⁹
D
D²

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