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Process Equipment and Plant Design

Process Equipment and Plant Design
Heat transfer co-efficient for a horizontal condenser as compared to a vertical condenser operating under similar conditions is

About 0.33 times
Same
Less
About 3 times

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Process Equipment and Plant Design
In actual operation of a bubble cap distillation tower, the __________ at the bottom of the tower is more than that at the top of the tower.

All of these
Molal flow rate of vapour
Pressure and temperature
Vapour molecular weight

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Process Equipment and Plant Design
Elastic failure of a material occurs, when the tensile stress equals yield strength, yield point or the elastic limit. Also, the elastic failure occurs according to maximum strain theory, when the maximum tensile strain equals (where, σ = yield strength and E = modulus of elasticity)

E/σ
Σ/E
Σ
E

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Process Equipment and Plant Design
Welded joint efficiency in the design of chemical process equipment is taken as

0.75
0.55
0.85
0.95

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Process Equipment and Plant Design
In a shell and tube heat exchanger, the 'tube pitch' is defined as the

O.D. of the tube for square pitch
Shortest distance between two adj acent tube holes
Shortest centre to centre distance between adjacent tubes
None of these

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

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