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Process Equipment and Plant Design

Process Equipment and Plant Design
Value of Peclet number = 0, is the representative of

Eddy diffusivity = 0
Complete back mixing
Laminar flow
Plug flow

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Process Equipment and Plant Design
Power required for agitation depends upon the

Agitator type & speed of agitation
Size of agitator & the tank
All of these
Height & properties of the liquid

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Process Equipment and Plant Design
In a cylinderical vessel subjected to internal pressure, the longitudinal stress σL and the circumferential stress, σh are related by

σh = σL
σh = σL/2
σh = 2 σL
No relation exists

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Process Equipment and Plant Design
Large process vessels operating under extreme temperature and pressure conditions are normally clad/ lined with materials like stainless steel, aluminium, nickel & its alloys, copper & its alloys and titanium. The cladding thickness is generally about __________ percent of the total thickness.

40 to 50
1 to 5
10 to 20
30 to 40

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Process Equipment and Plant Design
Bubble cap plate column is

Used only for distillation, not for absorption
A continuous contactor
A finite stage contactor
A differential stage contactor

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Process Equipment and Plant Design
The normal range of velocity of steam in pipes is __________ m/sec.

0.1-0.5
1-5
80-100
10-20

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