Which type of mixing involves the inversion of the powder bed using blades or paddles?
Anonymous Quiz
66%
a) Convective mixing/Macro mixing
15%
b) Shear mixing
9%
c) Diffusion mixing/Micro mixing
11%
d) Centrifugal mixing
What type of mixing breaks down forces of attraction, allowing each particle to move on its
own between regions of different components?
own between regions of different components?
Anonymous Quiz
13%
a) Convective mixing/Macro mixing
43%
b) Shear mixing
32%
c) Diffusion mixing/Micro mixing
12%
d) Centrifugal mixing
Which type of mixing involves the random motion of particles within the powder bed?
Anonymous Quiz
12%
a) Convective mixing/Macro mixing
3%
b) Shear mixing
71%
c) Diffusion mixing/Micro mixing
13%
d) Centrifugal mixing
How can segregation problems due to particle size differences be reduced?
Anonymous Quiz
10%
a) Increasing the moisture content of the powder
70%
b) Selecting particular sized fractions and milling of components
14%
c) Changing the shape of the particles
7%
d) Generating more surface charge during mixing
What can help reduce the tendency to segregate particles based on their shape?
Anonymous Quiz
86%
a) Controlled crystallization during production of the drug/excipients
6%
b) Increasing the moisture content of the powder
7%
c) Adding more additives to the mix
1%
d) Generating more surface charge during mixing
What is the main purpose of baffles, lifter blades, or container shape in tumbling mixers?
Anonymous Quiz
33%
a) To increase the speed of rotation
47%
b) To accentuate the tumbling motion
17%
c) To reduce the efficiency of the mixer
3%
d) To generate more heat during mixing
Which factor highly affects the efficiency of tumbling mixers?
Anonymous Quiz
54%
a) The geometric shape of the container
9%
b) The type of material being mixed
34%
c) The speed of rotation
3%
d) The size of the mixer
What advantage do agitator mixers have over tumblers for mixing solids?
Anonymous Quiz
8%
a) They depend entirely on gravity
74%
b) They are useful in mixing wetted, sticky, or plastic solids
18%
c) They are less efficient in breaking up lumps or aggregates
0%
d) They have lower shear forces
In a ribbon mixer, what is the purpose of having helical blades wound in opposite directions?
Anonymous Quiz
1%
a) To increase the speed of rotation
94%
b) To provide movement of material in both directions along the axis of the tank
2%
c) To generate more heat during mixing
2%
d) To create a stronger mixing action
What is a characteristic of solids mixing equipment regarding mixture composition
variations?
variations?
Anonymous Quiz
16%
a) Mixtures produced by small mixers have greater variations in composition
55%
b) Mixtures produced by large mixers have greater variations in composition
13%
c) The composition variations are independent of the size of the mixer
17%
d) The composition variations are solely dependent on the type of material being mixed
What is the main purpose of continuous mixing processes?
Anonymous Quiz
76%
a) To reduce both the scale and intensity of segregation
6%
b) To increase the speed of mixing
14%
c) To allow for higher shear forces
4%
d) To reduce the overall efficiency of the mixer
👍1
How does a barrel-type continuous mixer provide intense mixing of ingredients?
Anonymous Quiz
3%
a) By increasing the speed of rotation
90%
b) By using a set of baffles that causes a part of the material to move backward
3%
c) By generating more heat during mixing
5%
d) By using a stationary container
❤1
In a zig-zag continuous blender, what happens when the blender is inverted?
Anonymous Quiz
91%
a) The material splits into two portions, with one moving backward and the other moving forward
6%
b) The material remains stationary
4%
c) The material is mixed under tumbling motion
0%
d) The material is discharged from the blender
Which type of mixer is suitable for mixing solids in a sticky or plastic state?
Anonymous Quiz
18%
a) Tumblers/Blenders
54%
b) Agitator Mixers
21%
c) Ribbon Mixer/Blender
7%
d) Continuous Mixers
Which continuous mixer consists of several "V"-shaped blenders connected in series?
Anonymous Quiz
1%
a) Barrel Type Continuous Mixer
79%
b) Zig-zag Continuous Blender
4%
c) Ribbon Mixer/Blender
16%
d) Twin-shell Blender
What should an ideal mixer possess?
Anonymous Quiz
7%
a) High power consumption
8%
b) Difficulty in cleaning
82%
c) Gentle mixing action and low maintenance
3%
d) Product damage
What is a problem with rotating shell mixers?
Anonymous Quiz
16%
a) High power consumption
81%
b) Poor cross-flow along the axis
1%
c) Efficient mixing
2%
d) Good cross-flow
How can the mixing action in rotating shell mixers be improved?
Anonymous Quiz
6%
a) Reducing the drum size
90%
b) Adding baffles or inclining the drum on the axis
4%
c) Removing baffles
0%
d) Decreasing the speed of rotation
In cubical and polyhedron-shaped blenders, the powder is subjected more to a ________
motion
motion
Anonymous Quiz
34%
a) Rolling
58%
b) Sliding
3%
c) Jumping
5%
d) Twisting
Twin-shell and double-cone blenders are recommended for:
Anonymous Quiz
58%
a) Precision blending
31%
b) High power consumption
7%
c) Inefficient mixing
5%
d) Difficult cleaning