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Process Equipment and Plant Design

Process Equipment and Plant Design
Apex angle of conical heads used in the bottom heads of chemical process equipments is usually

45°
60°
30°
75°

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Process Equipment and Plant Design
A shell may by termed as thin if its thickness to diameter ratio is less than 0.1. The factor which can be neglected in the calculation of membrane stresses is

Deformation
Elongation
Bending
Shear

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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. m. °C)⁻¹
(kcal/hr.m² .°C)⁻¹

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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.

80
60
95
45

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Process Equipment and Plant Design
The distance between the top of the slots and the liquid surface when the static liquid is just ready to flow over the overflow weir is called

Static submergence
Skirt clearance
Downcomer liquid seal
None of these

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Process Equipment and Plant Design
In condenser, the cooling water is passed in the tube side in a pass arrangement, because

More thinner tubes can be used
It reduces heat transfer area
It makes condenser compact
Pressure drop is reduced

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