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Process Equipment and Plant Design

Process Equipment and Plant Design
The units of Young's modulus of elasticity and __________ are the same.

Stress
None of these
Modular ratio
Strain

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Process Equipment and Plant Design
In perforated plate towers, the

Hole sizes may be around 1/8" or 3/16"
All of these
Pressure drop is less compared is similar bubble cap towers
Total hole area may be around 6 to 15% of tower cross-sectional area

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Process Equipment and Plant Design
To keep the power input constant for a stirred vessel operating under fully developed turbulent flow conditions (constant power number), if the impeller diameter is increased by 20%, the impeller speed should be decreased by a factor of

(1.2)3/2
(1.2)5/3
(1.2)2/3
(1.2)3/5

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Process Equipment and Plant Design
Any shell opening greater than 5 cms for a storage tank must be reinforced for reason of

Preventing the local overstressing of the shell around the opening
Reduction of discontinuity in shape at the junction
None of these
Making the joint leak proof

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Process Equipment and Plant Design
Longitundinal stress induced in a thin walled cylindrical storage vessel is

PD/3t
PD/4t
PD/2t
PD/6t

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

Complete back mixing
Plug flow
Eddy diffusivity = 0
Laminar flow

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