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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.

NH₃
CO₂
None of these
SO₂

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Process Equipment and Plant Design
The diameter of a propeller agitator used in agitation tank ranges from __________ percent of the tank diameter and its peripherial speed is normally 300 to 500 metres/minute.

55 to 75
40 to 50
15 to 30
5 to 10

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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
Generally, as the length of the liquid path on a tray is increased beyond 5 ft, the overall column efficiency

Increases
Decreases
May increase or decrease depending upon the plate spacing
Remains same

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Process Equipment and Plant Design
The testing pressure of storage tanks and pressure vessels designed as per Indian standard codes should be about __________ times.the design pressure.

>5
1.5 to 2
3 to 4
4 to 5

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Process Equipment and Plant Design
In a double pipe concentric heat exchanger, the equivalent diameter of annulus for heat transfer would be (where, D₁ and D₂ are I.D. of inner and outer pipes)

(D₂² - D₁²)/D₂²
D₂ - D₁
(D₂² - D₁²)/D₁²
None of these

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