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Process Equipment and Plant Design

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

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Process Equipment and Plant Design
LMTD correction factor is used in heat exchanger design for

Multipass shell and tube heat exchanger
Double pipe heat exchanger
Counter flow of hot and cold fluids
Fouling fluids

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Process Equipment and Plant Design
Bubble cap plate column is

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

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Process Equipment and Plant Design
In case of saddle packing (e.g., berl and intralox saddles), the maximum size of the packing should not exceed __________ of the column diameter.

l/30th
l/50th
l/5th
l/15th

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Process Equipment and Plant Design
In a double pipe concentric heat exchanger, the equivalent diameter of annulus for heat transfer would be (where, D₁ and D₂ are I.D. of inner and outer pipes)

None of these
(D₂² - D₁²)/D₁²
D₂ - D₁
(D₂² - D₁²)/D₂²

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Process Equipment and Plant Design
A single pass air heater is connected to a two pass unit. For the air flow rate and other conditions remaining the same, the film heat transfer co-efficient for air will vary in the ratio of

None of these
2
20.2
20.8

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