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Process Equipment and Plant Design

Process Equipment and Plant Design
Movement of pipeline caused by thermal expansion is taken care by providing

Changes in its direction
Change in the shape of pipeline
All of these
Expansion joint

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Process Equipment and Plant Design
Which of the following factors affect the pressure drop in a co-current gas-liquid absorption packed tower?

All of these
Density and viscosity of fluids
Size, shape, orientation and surface of the packing particles
Fluid flow rates

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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
Is directly proportional to the radius of the dust particle path
None of these

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Process Equipment and Plant Design
In packed absorption tower, onset of flooding usually occurs at a pressure drop of about __________ mm of water column per metre height of packing.

50-75
25-50
200-250
750-1000

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Process Equipment and Plant Design
In which of the following evaporators, steam is fed inside the tube while the liquor is outside the tube?

None of these
Horizontal tube evaporator
Long tube vertical evaporator
Short tube vertical evaporator

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Process Equipment and Plant Design
Pressure drop due to pipe fittings can be estimated by the equation, ΔP/p = 4f.Le/D.V2/2gc, where, Le = equivalent length of straight pipeline which will incur the same frictional loss as the fitting and D = diameter of the fitting. The value of Le/D (dimensionless) for 45° elbow and 180° close return bends would be respectively around

300 and 500
45 and 75
5 and 10
180 and 300

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