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Technological Operations

1. What types of drying by convection are used
Static, with radiation, inductive, dynamic
2. How drying by dynamic convection is performed
With tray driers, with spray drying, with fluidized bed drier, with vacuum driers
3. What is drying by convection
The material to be dried is in contact with heated surface, The material to be dried is in contact with heated moving fluid, Drying is carried out with radiation on different wavelength, Freeze-drying
4. online quizzes What is drying by conduction
Drying is carried out with radiation on different wavelength, freeze-drying, The material to be dried is in contact with a heated surface, The material to be dried is in contact with a heated moving fluid
5. What is radiation drying
Freeze-drying, The material to be dried is in contact with a heated surface, Drying is carried out with radiation of different wavelength, The material to be dried is in contact with a heated moving fluid
6. What is spray drying
The material to be dried is in contact with a heated surface, Drying is carried out with radiation of a different wavelength, The material to be dried is in contact with a heated moving fluid, Method for preparing solid particulate material from solutions
7. What is freeze drying (lyophilization)
The material to be dried is in contact with a heated surface, Drying at low temperatures and low pressure, Drying is carried out with radiation of a different wavelength, The material to be dried is in contact with a heated moving fluid
8. Which properties are characteristic process of freeze drying ????
There is no concentration of solutions, Obtained product is dense, minimal contact with air, fast process
9. Moisture in a drug product is important for
homogenicity, Stability of the product, Solubility of the drug substances, Good flow
10. What is the purpose of the process %27%27particle size reduction%27%27
Separation of the particles according to their sizes, Reducing the particle size, Distribution of the particles of more than one substance, Eliminating the included moisture
11. Particle size reduction influences
accurate dosing, stability of the product, the rate of drug dissolution, mechanical strength
12. What methods for milling are used
cutting, convective, erasing, rasing
13. Which of the listed below mills is recommended for obtaining micronized powders
Hammer mill, cutter mill, fluid energy mill, ball mill
14. Which principle of size reduction is used in roller mill
by impact, by cutting, by attrition, by combined mechanism
15. Which principle of size reduction is used in fluid energy mill
by impact, by cutting, by attrition, by combined mechanism
16. which of the advantages listed below is characteristics of fluid energy mill ?????
high temp of heating of the product, long process, facilitated production process, narrow particle size distribution
17. Which factor is crucial for effective size reduction by a ball mill
time for pulverization, rotational speed of the drum of the mill, diameter of the mill, density of the mill
18. Which water contents could be removed by drying at definite relative moisture
The bound water in the product, the total moisture content in the product, unbounded water, all listed above
19. how can a product be dried under the equilibrium moisture content
through a long process of drying, by increasing the pressure over the product, by reducing the relative humidity of the environment, by increasing the surface of the material for drying....
20. what is the main purpose of the sieving process
separation of the particles according to their sizes, even distribution of the particles of more than one substance...., reducing the particle size, eliminating the included moisture
21. what is the purpose of the drying process
reducing the particle size, eliminating the included moisture, separation of the particles according to thei sizes, even distribution of the particles of more than one substance...
22. which substances usually undergo preliminary drying
Crystal hydrates, substances with moisture content below 2%25, substances that will be used for production of effervescent powd., substances with moisture content below 5%25
23. What is diffusive mixing
Transfer of large amounts of particles in the powder bed, movement of the layers of material to each other, movement of individual particles to each other, movement of particles only having definite sizes
24. which are the mechanisms of powder mixing
shear, diffusion, induction, convection
25. what is convective mixing
movement of the layers of material to each other, movement of individual particles to each other, movement of the particles only having definite sizes, transfer of large amounts of particles in the powder bed
26. What is shear mixing
Transfer of large amounts of particles n the powder bed , movement of the layers of material to each other, movement of the particles only having definite sizes, movement of individual particles to each other
27. the succesfull mixing of powders is responsible for ????
accurate dosing, stability of the product, reaching of the drug to relevant target sizes, provides the necessary degree and rate of release