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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
Lower
Same
Unpredictable

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Process Equipment and Plant Design
For laminar flow (NRe < 2100) in steel pipe, the optimum inside pipe diameter is given by

Di, opt = 3 Q0.36 ρ0.18
Di, opt = 7.6 Q0.36 . ρ0.9
Di, opt = 3.9 Q0.45 . ρ0.23
Di, opt = 3 Q0.36 . ρ1.86 μ0.08

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Process Equipment and Plant Design
Typical static submergence for bubble cap plate column operating at atmospheric pressure may be around

50% of the plate spacing
2.5"
0.5"
5"

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Process Equipment and Plant Design
Pressure drop per tray in the atmospheric distillation column is about __________ psi.

0.01 - 0.5
43833
0.5 - 1.0
0.07 - 0.12

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Process Equipment and Plant Design
The dust collection efficiency of a cyclone separator

Is inversely proportional to the mass of the dust particle
Decreases with increase in gas flow rate
None of these
Is directly proportional to the radius of the dust particle path

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Process Equipment and Plant Design
In a shell and tube heat exchanger, tube side __________ of the mass velocity.

Heat transfer co-efficient is proportional to 0.8th power
Neither A nor B
Pressure drop is proportional to the square
Both A & B

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