18 Questions
What is a disadvantage of the Hammer Mill according to the text?
High speed of operation causing heat generation
How do Vibration Mills achieve size reduction according to the text?
By repeated impaction due to vibration
What is the principle of operation for a Cutting Mill based on the text?
Milling with fracture of particles between two sets of knives
Why can Hammer Mills not be employed to mill sticky materials according to the text?
Due to the generation of heat affecting certain materials
What is the key drawback mentioned in the text regarding the Hammer Mill?
Potential screen clogging issues
How do Hammer Mills achieve size reduction according to the text?
By employing a high-speed operation generating heat
How does size reduction occur in a Multiple Drive Roller Mill?
By shearing as the material passes through the gap
What is the principle of operation of a Colloidal mill?
By shearing as the material flows between the milling surfaces
What is a disadvantage of using a hammer mill for size reduction?
May generate excessive heat during operation
How does size reduction occur in a vibration mill?
By impact as materials are hit by rapidly vibrating balls
Which method is NOT a type of compression method for comminution?
Colloidal mill
What distinguishes the size reduction process in a hammer mill from that in a Multiple Drive Roller Mill?
Compression between rotating hammers and surfaces
What is the primary function of the screen fitted in the base of the mill casing?
To retain material in the mill until a sufficient degree of size reduction has been achieved
Which type of materials is the end runner mill typically suitable for grinding?
Fibrous, wet, and soft materials like liquorice roots and peels
In the end runner mill, what causes size reduction according to the text?
Crushing due to the heavy weight of the steel pestle
What is a notable advantage of using an end runner mill for grinding?
It provides moderately fine powder
Why is the end runner mill considered not suitable for unbroken or slightly broken drug conditions?
Due to its crushing method which is not gentle enough for such conditions
What is the principle of operation in an end runner mill according to the text?
Size reduction achieved through crushing by the heavy steel pestle
Explore the advantages and disadvantages of using a hammer mill for grinding operations. Learn about the benefits such as minimal contamination, easy setup, and small space requirement, as well as drawbacks like heat generation and limitations on certain materials.
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