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Process Equipment and Plant Design

Process Equipment and Plant Design
The dust collection efficiency of electrostatic precipitator increases with increase in the

Neither A nor B
Electrode area
Gas flow rate
Both A & B

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Process Equipment and Plant Design
Cylinderical shell thickness of rotary drier is generally __________ mm.

18-22
44180
43864
43990

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Process Equipment and Plant Design
Flanges are connected to pipes by

Brazing
All of these
Welding
Screwing

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Process Equipment and Plant Design
Heat transfer co-efficient, hG(Kcal/hr.m² .°C) and mass velocity of air, G (kg/hr.m² ) for air flow parallel to the surface in case of constant drying rate in batch drying is related as hG = 0.0176G0.8. But when the flow of air perpendicular to the surface is encountered, this equation changes to

HG = 1.004G0.37
0.0176G1.37
1.004G0.8
HG = 0.0176G0.37

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Process Equipment and Plant Design
In a shell and tube heat exchanger having square pitch, the shell side equivalent diameter is given by (where, P = pitch, d = outside diameter of the tube)

Πd/4P²
4(P² - πd²/4)/πd
(P² - πd²/4)/πd
4P²/πd

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Process Equipment and Plant Design
Safety valves are provided in chemical equipments to guard against excessive

Turbulence
Noise
Temperature
Pressure/pressure fluctuation

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