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
Ribbon mixers suffer from:
Anonymous Quiz
0%
a) Low power requirement
91%
b) Difficulty in cleaning and higher power requirement
2%
c) Efficient blending
7%
d) Easy cleaning and low power requirement
Powders that exhibit high forces of cohesion or adhesion are:
Anonymous Quiz
12%
a) Easy to mix
76%
b) Difficult to mix
10%
c) Not affected by mixing
2%
d) None of the above
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What type of mixers are recommended for powders that exhibit high forces of cohesion or
adhesion?
adhesion?
Anonymous Quiz
84%
a) Agitators, preferably planetary and sigma blade
5%
b) Ribbon mixers
5%
c) Twin-shell blenders
5%
d) Double-cone blenders
For strongly cohesive materials, it is necessary to:
Anonymous Quiz
10%
a) Reduce the speed of rotation
83%
b) Fragment agglomerates through high shear devices
4%
c) Increase the size of the blender
3%
d) Use low shear devices
What is milling in the context of pharmaceutical production?
Anonymous Quiz
2%
a) Mixing different ingredients
3%
b) Heating a substance to a high temperature
94%
c) The mechanical process of reducing particle size of solids
1%
d) Cooling a substance to a low temperature
❤1
Which term is NOT synonymous with milling?
Anonymous Quiz
4%
a) Comminution
7%
b) Dispersion
82%
c) Crystallization
8%
d) Pulverization
How is the size of particles conventionally expressed in milling equipment?
Anonymous Quiz
5%
a) Micrometers
0%
b) Nanometers
93%
c) Mesh
1%
d) Millimeters
❤1
Which of the following is an example of coarse milling?
Anonymous Quiz
93%
a) Particles size larger than 20-mesh
3%
b) Particles size between 20 and 200-mesh
2%
c) Particles size smaller than 200-mesh
1%
d) Particles size larger than 1000-mesh
❤1
What is the effect of milling on the surface area per unit weight of a particle?
Anonymous Quiz
3%
a) No change
79%
b) Increases
15%
c) Decreases
4%
d) Cannot be determined
❤1👨💻1
Which of the following is NOT a pharmaceutical application affected by milling?
Anonymous Quiz
3%
a) Dissolution and therapeutic efficacy
0%
b) Extraction
3%
c) Drying
94%
d) Flavor enhancement
❤2
How does milling affect the drying process of wet masses?
Anonymous Quiz
28%
a) Increases drying time
55%
b) Decreases drying time
1%
c) No effect on drying time
16%
d) Drying time depends on the specific material
❤1
Which pharmaceutical application benefits from milling by ensuring uniform product
production?
production?
Anonymous Quiz
19%
a) Dissolution and therapeutic efficacy
5%
b) Extraction
15%
c) Drying
61%
d) Flowability
❤1
In the context of mixing or blending solid pharmaceutical ingredients, why is milling
beneficial?
beneficial?
Anonymous Quiz
7%
a) It increases the viscosity of the mixture
77%
b) It provides a greater uniformity of dose
10%
c) It reduces the need for additional ingredients
6%
d) It enhances the flavor of the final product
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