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Process Equipment and Plant Design

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

0.8
0.25
0.1
0.5

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Process Equipment and Plant Design
Baffle width is normally taken as __________ times the tank diameter.

0.45-0.6
0.2-0.45
0.4-0.5
0.1-0.12

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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/L.ρ
H.ρ/L
Z.H.ρ/L

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Process Equipment and Plant Design
Correct use of 'factor of safety' is very important in equipment design. It is defined as the ratio of the

Working stress to ultimate stress
Ultimate stress to working stress
None of these
Ultimate stress to breaking stress

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Process Equipment and Plant Design
For a cylinderical internally pressurised vessel, which of the following closure types would withstand highest pressure, if each closure is of the same material and thickness?

Conical
Ellipsoidal (2 : 1)
Hemispherical
Flat plate

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Process Equipment and Plant Design
Removable connection of tubes to tube sheet is called

Ferrule
Socket
Nipple
Saddle

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