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Process Equipment and Plant Design

Process Equipment and Plant Design
Steam side heat transfer co-efficient for design consideration under ordinary condition can be assumed to be about __________ kcal/hr.m².°C.

7500
1250
15000
2500

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Process Equipment and Plant Design
Any shell opening greater than 5 cms for a storage tank must be reinforced for reason of

Making the joint leak proof
None of these
Preventing the local overstressing of the shell around the opening
Reduction of discontinuity in shape at the junction

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Process Equipment and Plant Design
The diameter of a propeller agitator used in agitation tank ranges from __________ percent of the tank diameter and its peripherial speed is normally 300 to 500 metres/minute.

15 to 30
55 to 75
40 to 50
5 to 10

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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
Le/D for a Tee (used as elbow, entering run) would be around

60
350
5
200

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Process Equipment and Plant Design
The maximum liquid gradient over a tray must not exceed

Half the tray spacing
2"-3.5"
0.5" -1.25"
5"

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