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This quiz contains multiple-choice problems on basics and equipment of mixing, properties and location of impellers, propeller, open and shrouded turbine, paddle, draft tubes, flow, power, entrainment, flow patterns, interpretation, baffles, velocity patterns and gradient, jet and static mixers, mixer extruders, turbine design, power requirements, solid and dry powder mixing, blending granular solids and rate of mixing.
The width and speed of a conveyer belt depend on the material’s
Lump size
Bulk density
Pressure
Temperature
The filtrate flow rate in constant pressure filtration
Continuously increases
Continuously decreases
Is constant throughout
Is not affected
During filtration operation, the filtrate mainly encounters the resistance of the
Filter medium
Cake
Channel
No resistance
The specific cake resistance for compressible sludge is a function of the pressure drop
Over cake
Over medium
Overall
Rate
The controlling resistance in the rotary drum vacuum filter is the __ resistance.
Piping
Cake
Filter medium
Rate
The cake resistance increases steadily with filtration time in plate and frame filter employing constant filtration
Rate
Temperature
Flow
Density
Vibrating screens have capacities in the range of tons/ft^2 of __ mm mesh size.
0.2 to 0.8
4 to 25
50 to 100
100 to 250
Addition of filter aid to the slurry before filtration is done to __ of the cake.
Increase the porosity
Increase the compressibility coefficient
Decrease the porosity
Decrease the compressibility coefficient
Sphericity for a non-spherical particle is given by
6*V/D*S
V/6*D*S
D*S/V
V/D*S
The __ action does maximum size reduction in a ball mill.
Attrition
Compression
Impact
Cutting
The angle of surcharge lies between
50° to 60°
10° to 20°
3° to 5°
5° to 15°
Carrying idlers are inclined at an angle between
5° to 100°
10° to 200°
3° to 50°
1° to 30°
Wire belts have an operating temperature range of
160 °C to 1416 °C
500 °C to 600 °C
156 °C to 800 °C
480 °C to 1000 °C
The filtrate flow rate in constant pressure filtration
Continuously increases
Continuously decreases
Is constant throughout
Is not affected
What does the following equation represent?
F{fL} = μ{r2}mgl
Belt friction resistance
Power requirement
Load friction resistance
Idler spacing
