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Process Equipment and Plant Design

Process Equipment and Plant Design
Longitundinal stress induced in a thin walled cylindrical storage vessel is

PD/4t
PD/6t
PD/2t
PD/3t

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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
At equal mass velocities, the values of film co-efficients for gases as compared to that for liquids are generally.

Unpredictable
Higher
Same
Lower

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

30°
45°
75°
60°

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Process Equipment and Plant Design
What is the minimum recommended ligament for square pitch arrangement in case of heat exchangers?

Equal to tube I.D
Equal to tube O.D
6.5 cms
6.5 mm

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Process Equipment and Plant Design
In case of saddle packing (e.g., berl and intralox saddles), the maximum size of the packing should not exceed __________ of the column diameter.

l/5th
l/50th
l/30th
l/15th

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