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Process Equipment and Plant Design

Process Equipment and Plant Design
The absorption factor is defined as (where, S₁ = slope of the equilibrium curve, S₂ = slope of the operating line)

S₂/S₁
1/S₁.S₂
S₁/S₂
S₁.S₂

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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
4 to 5
3 to 4
1.5 to 2

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Process Equipment and Plant Design
In a rotary drier, the average retention time of solid is(where Z = length of the drier, metres ρ = apparent solid density, kg/m³ L = flow rate of dry solids, kg/see. m² drier cross-section H = hold up of solid.)

Z.H.ρ/L
L/Z.H.ρ
H.ρ/L
Z.H/L.ρ

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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.

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

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Process Equipment and Plant Design
Which of the following packing materials provides for maximum mass transfer?

All of these
Lessig rings
Raschig rings
Cross-partition rings

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

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

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