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Process Equipment and Plant Design

Process Equipment and Plant Design
Le/D for a Tee (used as elbow, entering run) would be around

200
5
60
350

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Process Equipment and Plant Design
Generally, no corrosion allowance in wall thickness of a part is required, if the thickness is more than __________ mm.

20
5
10
30

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Process Equipment and Plant Design
Hoop (circumferential) stress induced in a thin walled 'Horton Sphere' used for the storage of liquid ammonia under pressure is

pD/3t
pD/4t
pD/2t
pD/6t

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Process Equipment and Plant Design
Corrosion allowance in the design of pressure vessel/chemical equipment is not necessary, if

Material of construction is high alloy steel
Plain carbon steel and cast iron parts are used
Both B & C
Wall thickness is > 30 mm

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Process Equipment and Plant Design
A perforated plate has holes of diameter dh arranged in a pitch ph. Each hole has a tube of I.D. dt passing through it. The ligament efficiency is given by

(ph - dh . dt/2)/ph
(ph - dt)/ph
(ph - dh)/dh
(ph - dh)/ph

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Process Equipment and Plant Design
The retention time of material in a rotary dryer depends upon its

Slope & length
Rpm
All of these
Flights arrangement

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