Which type of dryer is suitable for drying granular solids?
Anonymous Quiz
5%
A) Static-bed dryer
3%
B) Moving-bed dryer
81%
C) Fluidized-bed dryer
12%
D) Pneumatic dryer
In Fluidized-Bed Systems, why does drying occur at a constant rate?
Anonymous Quiz
6%
A) The temperature is kept constant
17%
B) The drying gas is in continuous contact with the particles
69%
C) All the surface of particles is subjected to heat uniformly
8%
D) The particles are not completely dried
What is a desired characteristic of particles obtained from Fluidized Bed Dryers?
Anonymous Quiz
1%
A) More elongated particles
91%
B) More spherical, free-flowing particles
4%
C) More aggregated particles
5%
D) Greater migration of color
What type of materials can spray dryers handle?
Anonymous Quiz
9%
A) Solid materials
15%
B) Granular materials
74%
C) Fluid materials
2%
D) Coarse materials
What happens when liquid droplets contact the hot gas in a spray dryer?
Anonymous Quiz
76%
A) The surface liquid quickly evaporates
11%
B) The droplets become larger
9%
C) The droplets become sticky
4%
D) The droplets solidify
What type of particles are produced by spray drying?
Anonymous Quiz
90%
A) Intact spheres, spheres with buds, ruptured hollow spheres, or sphere fragments
5%
B) Irregularly shaped particles
4%
C) Granular particles
1%
D) Coarse particles
In which type of formulations are spray congealed coatings mainly used?
Anonymous Quiz
4%
A) Immediate-release formulations
90%
B) Taste masking and sustained-release formulations
4%
C) Rapid-dissolving formulations
3%
D) Controlled-release formulations
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In flash dryers, how is the moistened solid suspended?
Anonymous Quiz
7%
A) By gravity
83%
B) In a finely divided state at high velocity and temperature air stream
3%
C) In a fluidized bed
6%
D) By using a rotary pump
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What is another term for freeze drying?
Anonymous Quiz
92%
A) Lyophilization
1%
B) Desiccation
5%
C) Congealing
3%
D) Evaporation
During which stage of freeze drying does sublimation occur?
Anonymous Quiz
26%
A) Pre-freezing
15%
B) Vacuum
48%
C) Primary drying
12%
D) Secondary drying
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How is bound water or traces of water removed in freeze drying?
Anonymous Quiz
76%
A) By raising the temperature or using a desiccant
11%
B) By applying a vacuum
10%
C) By pre-freezing the materia
4%
D) By microwave energy
What is the main advantage of microwave drying over conventional drying methods?
Anonymous Quiz
9%
A) More uniform drying
3%
B) Slower drying rate
85%
C) Extremely rapid heat transfer throughout the material
3%
D) Lower energy consumption
In microwave drying, how is the energy in the form of microwaves converted?
Anonymous Quiz
80%
A) Into internal heat by interaction with the material
16%
B) Into external heat by interaction with the material
2%
C) Into light energy
3%
D) Into mechanical energy
In which form is moisture mobilized in microwave drying?
Anonymous Quiz
9%
A) As a liquid
72%
B) As a vapor
16%
C) As a solid
4%
D) As a gel
Which drying method is most suitable for drying heat-sensitive materials?
Anonymous Quiz
35%
A) Spray drying
4%
B) Flash drying
50%
C) Freeze drying
10%
D) Microwave drying
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In which stage of freeze drying is vacuum applied?
Anonymous Quiz
16%
A) Pre-freezing
74%
B) Vacuum
7%
C) Primary drying
4%
D) Secondary drying
What is the main purpose of secondary drying in freeze drying?
Anonymous Quiz
85%
A) To remove bound water or traces of water left after primary drying
5%
B) To provide latent heat of sublimation
4%
C) To freeze the material before applying vacuum
6%
D) To remove the unbound wate
Forwarded from Pharmacy planet 🌍
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