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Process Equipment and Plant Design

Process Equipment and Plant Design
Larger depth of liquid on the trays of a distillation column

Results in higher pressure drop per tray
Both A & B
Neither A nor B
Leads to high tray efficiency

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Process Equipment and Plant Design
Cooling water fouling factors vary in the range of 0.001 to 0.003

(BTU/hr.ft² . °F)⁻¹
(W/m².°K)⁻¹
(kcal/hr.m² .°C)⁻¹
(kcal/hr. m. °C)⁻¹

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Process Equipment and Plant Design
Which tube arrangement in a heat exchanger would facilitate highest heat transfer rate?

Heat transfer rate is independent of tube arrangement
Square pitch
Triangular pitch
Diagonal square pitch

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Process Equipment and Plant Design
With increase in pressure drop (for a given particle size), the dust collection efficiency of a cyclone separator will

Increase or decrease depending on the nature of the dust
Increase
Remain unaffected
Decrease

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Process Equipment and Plant Design
Fouling factor must be included in the calculation of over all design heat transfer coefficient, when the liquid

Containing suspended solids flows at high velocity
Containing suspended solids flows at low velocity
Is highly viscous
Is of high specific gravity

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Process Equipment and Plant Design
Diameter of rivet hole (d, mm) and the plate thickness (t, mm) are related by Unwin's formula as

D = 1.1 t
D = 3√t
D = 1.6 √t
D = 1.5 t

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