Discussion
Consider the following pairs of size reduction law and its basis:
Rittinger's law - Energy proportional to new surface created
Kick's law - Energy proportional to the logarithm of the size ratio
Bond's law - Energy related to the square root of particle size
Rittinger's law - Best suited to coarse crushing
How many of the pairs given above are correctly matched?
Answer: C
Correct answer: Only three
Three pairs are right. Rittinger's law makes energy proportional to the new surface created, Kick's law to the logarithm of the size ratio, and Bond's law relates energy to the square root of particle size through the work index.
The fourth is wrong. Rittinger's law is best suited to fine grinding, not coarse crushing, because it is the creation of new surface that dominates at small sizes. Coarse crushing is Kick's territory, where the same proportional reduction costs the same energy whatever the starting size.
Post your comment
Please log in or register to post a comment.
Examination Categories
- SSC Exams
- Banking Exams
- Teaching Exams
- Civil Services Exams
- Railways Exams
- Engineering Recruitment Exams
- Defence Exams
- State Government Exams
- Police Exams
- Insurance Exams
- Nursing Exams
- Other Government Exams
- NRA CET
- PG Entrance Exams
- Campus Placement
- MBA Entrance Exams
- CUET and UG Entrance
- Judiciary Exams
- Regulatory Body Exams
- Software Development