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Process Equipment and Plant Design

Process Equipment and Plant Design
Lug support is meant for supporting __________ vessels.

Thick walled tall
Large horizontal cylindrical
Tall but empty
Small

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Process Equipment and Plant Design
The ends of a cylinderical vessel can be closed by a head, which can be one of the four shapes. For the same thickness, choose the one which can withstand the highest pressure.

Hemispherical
Flat plate
Ellipsoidal
Torispherical

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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?

1
0.9
0.8
(0.8)0.5

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Process Equipment and Plant Design
The minimum baffle height should be

Twice the tank diameter
Equal to the impeller diameter
Twice the impeller diameter
3/4 of the tank height

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Process Equipment and Plant Design
Pressure drop due to pipe fittings can be estimated by the equation, ΔP/p = 4f.Le/D.V2/2gc, where, Le = equivalent length of straight pipeline which will incur the same frictional loss as the fitting and D = diameter of the fitting. The value of Le/D (dimensionless) for 45° elbow and 180° close return bends would be respectively around

5 and 10
45 and 75
300 and 500
180 and 300

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Process Equipment and Plant Design
In the design of a paddle agitator, the ratio (paddle dia/tank dia) is normally taken as

0.25
0.1
0.5
0.8

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