Why is mixing considered a critical factor in the manufacturing process of tablets or
granules?
granules?
Anonymous Quiz
10%
a) It affects the flowability of the powder
79%
b) It ensures a uniform distribution of additives and active ingredients
8%
c) It reduces the size of the particles
2%
d) It changes the shape of the particles
What is the best type of mix likely to be obtained in practice when mixing powders?
Anonymous Quiz
11%
a) Perfect mix
3%
b) Point uniformity
77%
c) Random mix
8%
d) Segregated mix
What is the main cause of segregation in powder mixes?
Anonymous Quiz
14%
a) Differences in particle shapes
7%
b) Differences in particle charges
65%
c) Differences in particle sizes
13%
d) Differences in processing techniques
Which particle shape exhibits the greatest flowability and is more easily mixed?
Anonymous Quiz
78%
a) Spherical
9%
b) Irregular
10%
c) Needle-shaped
3%
d) Cubic
What is an undesirable consequence of surface charging of particles during mixing?
Anonymous Quiz
27%
a) Increase in interparticulate diffusion
60%
b) Decrease in interparticulate diffusion
7%
c) Improved flowability
7%
d) Improved mixing efficiency
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