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Process Equipment and Plant Design

Process Equipment and Plant Design
Minimum baffle spacing recommended in a shell and tube heat exchanger is equal to

5 cms
40% of the I.D. of the shell
I.D. of the shell
25 cms

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

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Process Equipment and Plant Design
Which of the following material is seldom used for pressure vessel construction?

Semi-killed steel
Killed steel
Mild steel
Rimmed still

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Process Equipment and Plant Design
Compensation against openings in process vessels for giving inlet and outlet connections, for providing sight glasses and manholes etc. is provided for strength and rigidity. The most efficient type of compensation is of __________ type.

Nozzle or rim
Fluid in
Flared out
Ring plate

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Process Equipment and Plant Design
Which of the following is used to set the diameter of the distillation column?

Length of straight rectangular weir on cross-flow tray
Allowable vapour velocity
Static submergence
Number of theorectical plates

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Process Equipment and Plant Design
Lessing ring is formed by the addition of a partition across the centre of a raschig ring, which results in an area increase of about __________ percent.

20
55
35
5

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