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
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
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