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Process Equipment and Plant Design

Process Equipment and Plant Design
In a continuous distillation column, the optimum reflux ratio ranges from __________ times the minimum reflux ratio.

1.1 to 1.5
2.7 to 3
1.6 to 2
2.2 to 2.6

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Process Equipment and Plant Design
Which of the following types of reactors is the safest from operation point of view?

A vapor phase reactor
A liquid phase catalytic reactor
A liquid phase reactor
Pot type reactor

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Process Equipment and Plant Design
The longitudinal stress induced in a thin walled cylinderical vessel under internal pressure is

pd/t
pd/8t
pd/4t
pd/2t

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Process Equipment and Plant Design
Overall mass transfer co-efficient in case of absorption of __________ in water is based on the gas film co-efficient only, as the mass transfer process is gas film (phase) controlling.

NH₃
SO₂
None of these
CO₂

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Process Equipment and Plant Design
A rivetted joint does not fail by __________ of rivets.

None of these
Shearing
Tearing
Tearing of the plate across a row

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

200
350
5
60

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