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Process Equipment and Plant Design

Process Equipment and Plant Design
Thin spherical shells subjected to internal pressure, develop __________ stresses.

Radial
Both A & B
Neither A nor B
Circumferential

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Process Equipment and Plant Design
The safe distance of habitation from a hazardous chemical plant (TLV of its product < 1000 ppm) should be about __________ kms.

25
5
1
15

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Process Equipment and Plant Design
A minimum clearance of about __________ mm is maintained between the distillation column wall and the bubble cap.

95
38
76
19

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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/L.ρ
Z.H.ρ/L
H.ρ/L
L/Z.H.ρ

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

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

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Process Equipment and Plant Design
In a multipass shell and tube heat exchanger, the baffles on shell side is primarily provided for

Fixing the tubes
Increasing pressure drop
Creating turbulence
Reducing scale deposition

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