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Process Equipment and Plant Design

Process Equipment and Plant Design
Cylinderical shell thickness of rotary drier is generally __________ mm.

18-22
43990
44180
43864

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Process Equipment and Plant Design
Ratio of tube length to shell diameter for a shell and tube heat exchanger is

4 : 1 to 8 : 1 for liquid-liquid exchanger
< 4 : 1 for gas-gas exchangers
8 : 1 to 12 : 1 for both liquid-liquid and gas-gas heat exchangers
Both B & C

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Process Equipment and Plant Design
Optimum reflux ratio in a continuous distillation column is determined by the

Flooding limit of the column
None of these
Total cost consideration (fixed cost of the column plus the cooling water & steam cost)
Maximum permissible vapour velocity

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Process Equipment and Plant Design
Bubble cap plate column is

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

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Process Equipment and Plant Design
A pipe is generally made of circular cross-section, because a circular cross-section has the

Higher structural strength
Both A & B
Lowest surface area requirement for a given volume
None of these

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Process Equipment and Plant Design
The minimum tray spacing in distillation column of diameter less than 3 ft is normally __________ inches.

24
18
34
6

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