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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.

Higher
Unpredictable
Lower
Same

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Process Equipment and Plant Design
Fouling factor must be included in the calculation of over all design heat transfer coefficient, when the liquid

Is highly viscous
Is of high specific gravity
Containing suspended solids flows at low velocity
Containing suspended solids flows at high velocity

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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
1.5 times
Three fourth

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Process Equipment and Plant Design
Height of the flights in the rotary drier is in the range of

0.08 to 0.12 d
0.5 to 0.6 d
0.02 to 0.05 d
0.2 to 0.5 d

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Process Equipment and Plant Design
For a cylinderical internally pressurised vessel, which of the following closure types would withstand highest pressure, if each closure is of the same material and thickness?

Flat plate
Conical
Ellipsoidal (2 : 1)
Hemispherical

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Process Equipment and Plant Design
The operating velocity in the absorption tower is usually 40-50% of the flooding velocity. Packed absorption towers are normally designed for a pressure drop of about __________ mm of water column per metre height of packing.

1000-1500
43835
100-150
20-40

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