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Process Equipment and Plant Design

Process Equipment and Plant Design
At equal mass velocities, the values of film co-efficients for gases as compared to that for liquids are generally.

Unpredictable
Higher
Lower
Same

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Process Equipment and Plant Design
1.2 to 3.8 cms is the value of the

Skirt clearance for bubble caps
Static submergence in case of a bubble cap tray for column operating under pressure (≥ 1 atm.)
Downcomer liquid seal in case of a balanced tray design
All of these

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Process Equipment and Plant Design
The ratio of volumes of the mixed reactor to the plug flow reactor (for identical feed composition, flow rate, conversion, and for all positive reaction orders) is always

< 1
1
>1
Equal to the order of reaction

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Process Equipment and Plant Design
The clearance between two tubes in a shell and tube heat exchanger is known as 'ligament', whose minimum value is __________ the outside diameter of the tube, but in no case it should be less than 4.5 mm.

Equal to
Three fourth
One fourth
Half

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Process Equipment and Plant Design
In packed towers provided with saddle packing, liquid redistributors are positioned at every __________ times column diameter or 6 metres whichever is less.

44119
20-25
43864
43959

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Process Equipment and Plant Design
Lug support is meant for supporting __________ vessels.

Tall but empty
Large horizontal cylindrical
Thick walled tall
Small

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