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Process Equipment and Plant Design

Process Equipment and Plant Design
Joint efficiency (J) for a seamless pipe is

1.2
0.85
1
< 0.5

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

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Process Equipment and Plant Design
For identical operating conditions, the pressure drop over __________ tray is the highest out of the following.

Bubble cap
Counterflow
Sieve
Valve

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Process Equipment and Plant Design
Floating head heat exchangers are used for the

Heat transfer between corrosive fluids
Counter-current heat transfer systems
Co-current heat transfer systems
Cases where temperature difference between the shell and the tubes is more (>50°C)

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Process Equipment and Plant Design
In a rotary drier, the average retention time of solid is(where Z = length of the drier, metres ρ = apparent solid density, kg/m³ L = flow rate of dry solids, kg/see. m² drier cross-section H = hold up of solid.)

Z.H/L.ρ
H.ρ/L
L/Z.H.ρ
Z.H.ρ/L

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Process Equipment and Plant Design
The retention time of material in a rotary dryer depends upon its

Flights arrangement
All of these
Rpm
Slope & length

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