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Process Equipment and Plant Design

Process Equipment and Plant Design
Normally, the length to diameter ratio of rotary dryers varies form 4 to 10 and for its economic operation, the number of transfer units (NTU) for such dryers varies from

1.5-2.5
44119
3.5-5.5
7.5-10.0

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Process Equipment and Plant Design
Slope of countercurrent flow rotary drier is in the range of __________ meter/metre.

0 to 2.2
0 to 0.08
0 to 1.5
0 to 0.8

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Process Equipment and Plant Design
__________ tower is the most suitable gas-liquid contacting device involving highly corrosive fluids.

Bubble cap plate
Packed
None of these
Sieve plate

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Process Equipment and Plant Design
Le/D for fully open gate valves would be

Both B and C
Around 7
Much more than that for fully open globe valves
Much less (say 2% than that for fully open globe valves)

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Process Equipment and Plant Design
A minimum clearance of about __________ mm is maintained between the distillation column wall and the bubble cap.

95
38
19
76

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Process Equipment and Plant Design
A 'rupture disc' is provided in chemical equipments as an accessory meant for

Creating turbulence
Enhancing mixing rate
Avoiding vortex formation
Relieving excess pressure

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