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Process Equipment and Plant Design

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.

SO₂
NH₃
None of these
CO₂

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Process Equipment and Plant Design
Length to diameter ratio of most rotary driers is in the range of

20 to 30
10 to 20
1 to 2
4 to 10

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Process Equipment and Plant Design
A high vapour velocity is required for high plate efficiency in a seive plate coloumn. The satisfactory value of operating vapor velocity for design purpose in seive plate column is about __________ percent of the flooding velocity.

45
60
95
80

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Process Equipment and Plant Design
The stress developed in a material without any permanent set is called the

Elastic limit
Yield stress
Ultimate stress
Breaking stress

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Process Equipment and Plant Design
Normal screwed fittings are used for pipes upto a diameter of __________ inches.

7
1.5
3
5

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Process Equipment and Plant Design
Bracket supports are the most suitable for supporting __________ vessels.

Thin shperical (e.g. Horton sphere)
Thick walled vertical
Horizontal
None of these

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