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Process Equipment and Plant Design

Process Equipment and Plant Design
The approximate liquid depth in an agitation tank is equal to (where, d = tank diameter)

0.5 d
D
0.75 d
2 d

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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.

None of these
SO₂
NH₃
CO₂

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Process Equipment and Plant Design
In case of saddle packing (e.g., berl and intralox saddles), the maximum size of the packing should not exceed __________ of the column diameter.

l/5th
l/30th
l/50th
l/15th

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Process Equipment and Plant Design
Multiple blade paddle agitator is used for mixing high viscosity liquids/paste in which the paddle diameter is commonly 0.8 times the tank diameter. However, the width of the blade is in the range of __________ times the paddle diameter.

0.3 to 0.5
0.65 to 0.80
0.1 to 0.25
0.5 to 0.6

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Process Equipment and Plant Design
__________ of water makes it a widely used coolant in heat exchangers.

Low corrosiveness
Low viscosity
Low dirt factor
High specific heat

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Process Equipment and Plant Design
Corrosion allowance in the design of pressure vessel/chemical equipment is not necessary, if

Plain carbon steel and cast iron parts are used
Both B & C
Material of construction is high alloy steel
Wall thickness is > 30 mm

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