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Process Equipment and Plant Design

Process Equipment and Plant Design
Friction factor for turbulent flow in a new pipe is given by

f = 25/NRe
f = 0.22 NRe0.05
f = 16/NRe
f = 0.04/NRe0.16

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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

7.5-10.0
1.5-2.5
3.5-5.5
44119

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Process Equipment and Plant Design
The LMTD correction factor (FT) is applied in __________ heat exchangers.

Double pipe
All multipass
All of these
1-1 cocurrent

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Process Equipment and Plant Design
In a continuous distillation column, the optimum reflux ratio ranges from __________ times the minimum reflux ratio.

1.6 to 2
2.7 to 3
2.2 to 2.6
1.1 to 1.5

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Process Equipment and Plant Design
Smaller sized packings are generally dumped to the packed columns, and the large ones of size greater than __________ mm are stacked individually, which provides better control over bed porosity and offers lower gas pressure drop.

25
75
50
150

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Process Equipment and Plant Design
The shell side pressure drop in a shell and tube heat exchanger is maximum for __________ baffle.

Independent of the type of
Orifice
Segmental
Disk and ring

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