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Process Equipment and Plant Design

Process Equipment and Plant Design
Which of the following packing materials provides for maximum mass transfer?

All of these
Cross-partition rings
Lessig rings
Raschig rings

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Process Equipment and Plant Design
Liquid/petroleum fuel storage tanks are built underground (as in case of petrol pumps), when the storage capacity is less than __________ kilolitres.

20
85
45
30

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Process Equipment and Plant Design
Tubes are fixed to the tube sheet (a thick circular metallic plate) by the method of tube rolling and brazing (non-removable) or ferrule connection (removable). Thickness of the tube, sheet is normally __________ the outside diameter of the tube but in no case it should be less than 22 mm (7/8").

Half
Equal to
Three fourth
1.5 times

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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)3/2
(1.2)5/3

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

Rimmed still
Semi-killed steel
Mild steel
Killed steel

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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
20.2
2
20.8

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