GTU BE 2019 Summer Question Papers || Gujarat Technological University
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER-VII(NEW) EXAMINATION - SUMMER 2019
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Subject Code: 2172204 Date:27/05/2019
Subject Name: Mineral Processing
Time: 02:30 PM TO 05:00 PM Total Marks: 70
Instructions:
- Attempt all questions.
- Make suitable assumptions wherever necessary.
- Figures to the right indicate full marks.
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| Q.1 | (a) Define mineral processing and the various steps involved in it. | 03 |
| (b) With the help of a short note explain the importance of mineral processing in mining industry. | 04 | |
| (c) Explain communition and liberation in detail with different steps involved in it. | 07 | |
| Q.2 | (a) Explain Kick’s law. | 03 |
| (b) List out the objectives of grinding. | 04 | |
| (c) Compare jaw crusher with gyratory crusher. | 07 | |
| OR | ||
| (c) Explain ball mill and the various zones created in it during grinding. | 07 | |
| Q.3 | (a) Define: (i) sizing; (ii) jigging; and (iii) thickening. | 03 |
| (b) Describe the constructional features of a Blake jaw crusher. | 04 | |
| (c) Describe froth floatation process for the concentration of minerals. Give names of any two ores which can be concentrated using this process. | 07 | |
| OR | ||
| Q.3 | (a) What do you understand by ‘open ‘circuit’ and ‘closed circuit’ grinding? | 03 |
| (b) Write a note on how grade of a mineral is maintained according to market demand. | 04 | |
| (c) Using a labeled diagram explain magnetic separators. | 07 | |
| Q.4 | (a) Briefly explain gravity concentration. | 03 |
| (b) Explain the principle underlying the working of hydrocyclones. | 04 | |
| (c) Write short note on heavy media separation. | 07 | |
| OR | ||
| Q.4 | (a) What is the purpose of collectors? | 03 |
| (b) Write a short note on laws of solids settling in fluids. | 04 | |
| (c) Write a note on industrial screens. | 07 | |
| Q.5 | (a) Explain vibrating tables in brief. | 03 |
| (b) Explain the factors influencing washability of coal. | 04 | |
| (c) Draw and explain simplified flowsheet for the concentration of copper ore. | 07 | |
| OR | ||
| Q.5 | (a) Write a note on laboratory sieve analysis. | 03 |
| (b) Explain different methods of sampling. | 04 | |
| (c) Draw and explain simplified flowsheet for concentration of magnetite ore. | 07 |
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