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Process Equipment and Plant Design

Process Equipment and Plant Design
The thermal stress in a metallic bar does not depend upon the

Both A & B
Cross-sectional area
Changes in temperature
Neither A nor B

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Process Equipment and Plant Design
For a cylinderical vessel of moderate height, the weld joint efficiency for joints parallel to the cylinderical axis is given as 1.0, while for joints along the girth (circumference) it is given as 0.8. In calculating the shell wall thickness using code formula for an internally pressurised cylinderical vessel, what value of weld joint efficiency should be used?

0.9
0.8
1
(0.8)0.5

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Process Equipment and Plant Design
Tube side pressure drop in a 1-2 heat exchanger (for turbulent flow of fluids through the tubes) is about __________ times, that in a 1-1 heat exchanger having the same size & number of tubes and operated at the same liquid flow rate.

1/2
8
4
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.)

L/Z.H.ρ
Z.H.ρ/L
Z.H/L.ρ
H.ρ/L

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Process Equipment and Plant Design
Diameter of the seive tray column is determined by the

Hole diameter of the seive tray
Lower limit of vapour velocity
Height of the plate spacing
Upper limit of the vapour velocity

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

Both A & B
Radial
Neither A nor B
Circumferential

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