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Process Equipment and Plant Design

Process Equipment and Plant Design
Speed of the drum of the rotary vacuum filter normally ranges from __________ rpm.

8 to 15
3 to 8
0.1 to 2
5 to 7

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Process Equipment and Plant Design
Longitundinal stress induced in a thin walled cylindrical storage vessel is

PD/4t
PD/2t
PD/3t
PD/6t

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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.

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

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Process Equipment and Plant Design
In a multiple effect evaporator system having 'n' effects, the amount of water evaporated per unit surface area in approximately equal to __________ times that in a single effect.

(1/n)th
1.5 nth
nth
0.5 nth

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Process Equipment and Plant Design
The main purpose of providing stepping on the trays is to

Increase the residence time
Facilitate handling of large flow rate of liquid
Improve the flow condition
Decrease the pressure drop

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

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

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