Mechanical Operations

By Prof. Shabina Khanam   |   IIT Roorkee
Learners enrolled: 558
Around 75% of chemical manufacturing processes involve small solid particles at some point. Proper design and handling of these fine particles often makes the difference between success and failure of the product. Many products such as catalysts, pigments, fertilizers, cements, ceramics and pharmaceuticals are currently manufactured in particulate forms. Mechanical Operations deal with Science and Technology of particulate matter, which is a multidisciplinary field including Materials Science, Environmental, Biomedical, Aerospace, Agricultural, Chemistry, Microbiology and Cell Science, Pharmacy and Medicine. The primary objective of this course is to
•    identify the important physical mechanisms occurring in processes involving particles
•    discuss unit operation and its role in Chemical industries, characteristics of particulate solids, Principles of size reduction, particle dynamics and separation of particles
•    formulate and solve mathematical descriptions of such processes

INTENDED AUDIENCE : Undergraduate students. However, this course will also be helpful for anyone of any professional level, preferably holding a college degree or with substantial industrial experience, working in the production, handling, processing, modification or characterization of particular solids (powders and bulk solids).

Any chemical industry which deals with particulate matter.
Course Status : Completed
Course Type : Core
Duration : 4 weeks
Category :
  • Chemical Engineering
Credit Points : 1
Level : Undergraduate
Start Date : 25 Jul 2022
End Date : 19 Aug 2022
Enrollment Ends : 08 Aug 2022
Exam Date : 25 Sep 2022 IST

Note: This exam date is subjected to change based on seat availability. You can check final exam date on your hall ticket.

Page Visits

Course layout

Week 1
  • Introduction
  • Characterization of a single particle
  • Characterization of collection of particles
Week 2
  • Fine grain size distribution
  • Effectiveness of screen
  • Industrial screening equipment
  • Size reduction
Week 3
  • Laws of comminution
  • Examples of laws of comminution
  • Size reduction equipment
Week 4    
  • Particle dynamics
  • Particle dynamics – Examples
  • Classification and Jigging

Books and references

  1. Backhurst, J. R. and Harker J. H.,”Coulson and Richardson Chemical Engineering”, Vol. II”,5th Ed., 2002, Butterworth-Heinemann.
  2. Brown G.G. and Associates, "Unit Operations", 1995, CBS Publishers.
  3. McCabe W.L., Smith J.C and Harriott P., “Unit Operations of Chemical Engineering”, 7th Ed., 2005, McGraw Hill.
  4. Geankoplis C.J., Transport Processes and Separation Process Principles, 4th Ed., 2003, Prentice Hall.
  5. Narayanan C.M. and Bhattacharya B.C., “Mechanical Operation for Chemical Engineers –Incorporating Computer Aided Analysis”, 1992, Khanna Publishers.

Instructor bio

Prof. Shabina Khanam

IIT Roorkee
Shabina Khanam is working as Associate Professor in Chemical Engineering Department of IIT Roorkee. She has completed B.Tech degree from AMU Aligarh, Aligarh in 2000 and M.Tech and Ph.D. degree from IIT Roorkee in 2002 and 2007, respectively. Her major fields of study are Process Integration, Energy Management and Modeling and Simulation. She has almost 9 years of experience in teaching and research. During this period she has supervised 1 Ph.D. and 14 M.Tech theses. At present 6 Ph.D and 3 M.Tech theses are in pipe line. She has published 29 and 24 research papers in different refereed journals and conferences, respectively. She has taught the course Mechanical Operations six times in her 9 years of teaching career.

Course certificate

The course is free to enroll and learn from. But if you want a certificate, you have to register and write the proctored exam conducted by us in person at any of the designated exam centres.
The exam is optional for a fee of Rs 1000/- (Rupees one thousand only).
Date and Time of Exams: 25 September 2022 Morning session 9am to 12 noon; Afternoon Session 2pm to 5pm.
Registration url: Announcements will be made when the registration form is open for registrations.
The online registration form has to be filled and the certification exam fee needs to be paid. More details will be made available when the exam registration form is published. If there are any changes, it will be mentioned then.
Please check the form for more details on the cities where the exams will be held, the conditions you agree to when you fill the form etc.


Average assignment score = 25% of average of best 3 assignments out of the total 4 assignments given in the course.
Exam score = 75% of the proctored certification exam score out of 100

Final score = Average assignment score + Exam score

YOU WILL BE ELIGIBLE FOR A CERTIFICATE ONLY IF AVERAGE ASSIGNMENT SCORE >=10/25 AND EXAM SCORE >= 30/75. If one of the 2 criteria is not met, you will not get the certificate even if the Final score >= 40/100.

Certificate will have your name, photograph and the score in the final exam with the breakup.It will have the logos of NPTEL and IIT Roorkee.It will be e-verifiable at nptel.ac.in/noc.

Only the e-certificate will be made available. Hard copies will not be dispatched.

Once again, thanks for your interest in our online courses and certification. Happy learning.

- NPTEL team

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