GTU BE/B.Tech 2019 Winter Question Papers || Gujarat Technological University
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER- VI (New) EXAMINATION - WINTER 2019
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Subject Code: 2162204
Subject Name: Mine Hazards
Time: 02:30 PM TO 05:00 PM
Total Marks: 70
Instructions:
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- Attempt all questions.
- Make suitable assumptions wherever necessary.
- Figures to the right indicate full marks.
| Q.No. | Question | Marks |
|---|---|---|
| Q.1 (a) | Explain: How can fire be an incident? | 03 |
| Q.1 (b) | How dust formation happens in mines? How to prevent it? | 04 |
| Q.1 (c) | What are the factors that affect the inflammability in coal dust | 07 |
| Q.2 (a) | Write a short note on Accidental fires. | 03 |
| Q.2 (b) | How is recovery carried out in case of explosion? | 04 |
| Q.2 (c) | List out types of fire extinguishers. Explain foam extinguisher with neat sketch. | 07 |
| OR | ||
| Q.2 (c) | Write the different types of classes of fires. | 07 |
| Q.3 (a) | Write short note on methane layering. | 03 |
| Q.3 (b) | Explain the causes due to spontaneous heating in opencast mines and underground mines. | 04 |
| Q.3 (c) | Describe: Detection and Prevention of Spontaneous Combustion. | 07 |
| OR | ||
| Q.3 (a) | Define the following: (1) Stope (2) Winze (3) Raise. | 03 |
| Q.3 (b) | Describe the water blast danger & its prevention. | 04 |
| Q.3 (c) | What do you mean by spontaneous heating? Give the factor affecting Spontaneous heating of coal. | 07 |
| Q.4 (a) | Write note on effect of Spontaneous Combustion. | 03 |
| Q.4 (b) | Explain Chemical oxygen breathing apparatus. | 04 |
| Q.4 (c) | Explain Proto-IV self contained breathing apparatus with diagram. | 07 |
| OR | ||
| Q.4 (c) | Describe the basic fundamental of cut & fill method. | 07 |
| Q.5 (a) | How can problem of radiation in atomic mineral mines be reduced? | 03 |
| Q.5 (b) | Write note on-physical and chemical characteristics of coal liable to spontaneous heating. | 04 |
| Q.5 (c) | What are the uses of Fire Extinguisher? | 07 |
| Q.5 (a) | Write note on Firefighting Organization. | 03 |
| Q.5 (b) | What are various methods of reopening mines? | 04 |
| Q.5 (c) | Define the following : (1) Cross — Cut (2) Lateral (3) Ore Drive | 07 |
| OR | ||
| Q.5 (a) | Explain Coward's diagram. | 03 |
| Q.5 (b) | List out carbon monoxide detectors and explain any two. | 04 |
| Q.5 (c) | 07 | |
Date: 06/12/2019
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