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Process Equipment and Plant Design

Process Equipment and Plant Design
In shell and tube heat exchangers, straight tie rods are used to

Hold baffle in space
Fix the tubes in position
None of these
Account for thermal strain

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Process Equipment and Plant Design
The distance between the top of the slots and the liquid surface when the static liquid is just ready to flow over the overflow weir is called

Downcomer liquid seal
None of these
Skirt clearance
Static submergence

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Process Equipment and Plant Design
Multiple blade paddle agitator is used for mixing high viscosity liquids/paste in which the paddle diameter is commonly 0.8 times the tank diameter. However, the width of the blade is in the range of __________ times the paddle diameter.

0.5 to 0.6
0.3 to 0.5
0.1 to 0.25
0.65 to 0.80

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

Slope & length
Rpm
All of these
Flights arrangement

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Process Equipment and Plant Design
In a distillation column, bubble caps are located on trays with a pitch of __________ times the outside diameter of the caps.

1.5 to 3
2.5
1.3 to 2
1.6 to 2

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

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