JNTU
JNTU B.Tech III MINE ENVIRONMENTAL ENGINEERING II Previous Question Paper (January/February - 2023 - R16)
Note: i) Question paper consists of Part A, Part B.
ii) Part A is compulsory, which carries 25 marks. In Part A, Answer all questions.
iii) In Part B, Answer any one question from each unit. Each question carries 10 marks and may have a, b as sub questions.
Part A
List the methods of fire extinguishing adopted in mine fires.
Answer
The methods of fire extinguishing in mines include: direct attack using water or fire extinguishers, construction of fire stoppings (sealing), pressure balancing, and the use of inert gases like nitrogen or carbon dioxide.
Draw the diagram of soda acid extinguisher.
Answer
A soda-acid extinguisher consists of a cylindrical container filled with a sodium bicarbonate solution, with an inner glass bottle containing concentrated sulfuric acid. When the plunger is struck, the bottle breaks, mixing the acid with the bicarbonate to produce carbon dioxide gas, which forces the liquid out through the nozzle.
What are the measures to be adopted for reopening of selected-off area?
Answer
Sign in to view the complete answer paper.
What are the precautions for fire damp explosion?
Answer
Sign in to view the complete answer paper.
Name the government body which regulates coal mining in India and its functions.
Answer
Sign in to view the complete answer paper.
Write the causes of coal dust explosion.
Answer
Sign in to view the complete answer paper.
Mention the reasons for inundation in mines.
Answer
Sign in to view the complete answer paper.
What precautions to be taken while dealing with old workings?
Answer
Sign in to view the complete answer paper.
How cap-lamp can be examined for its maintenance?
Answer
Sign in to view the complete answer paper.
Draw a neat labelled diagram of self-rescuer.
Answer
Sign in to view the complete answer paper.
Part B
List out the control measures to avoid spontaneous heating.
Answer
Sign in to view the complete answer paper.
Write a brief notes on advantages and disadvantages of various fire extinguishing methods.
Answer
Sign in to view the complete answer paper.
Write a short notes on mine fires of Indian mines.
Answer
Sign in to view the complete answer paper.
Draw a neat sketch of fire extinguisher. Explain its suitability with advantages and disadvantages.
Answer
Sign in to view the complete answer paper.
Explain the advanced techniques used for rescue operations in fire zones.
Answer
Sign in to view the complete answer paper.
What are the factors responsible for fire damp explosion?
Answer
Sign in to view the complete answer paper.
Explain the method of selected-off area.
Answer
Sign in to view the complete answer paper.
Write the necessary preventive measures of fire damp explosion.
Answer
Sign in to view the complete answer paper.
What are the causes of hazards in coal mines.
Answer
Sign in to view the complete answer paper.
Write a brief note on assessment method of mine dust.
Answer
Sign in to view the complete answer paper.
Explain the preventive measures of mine dust hazards.
Answer
Sign in to view the complete answer paper.
Write the causes of inundation of mines.
Answer
Sign in to view the complete answer paper.
Briefly explain the environmental aspects of blast induced vibration and noise in mining.
Answer
Sign in to view the complete answer paper.
Mention the precautions to be taken for reducing noise.
Answer
Sign in to view the complete answer paper.
What are the preventive measures to be taken during inundation of mines?
Answer
Sign in to view the complete answer paper.
Explain the limitations of flame safety lamps.
Answer
Sign in to view the complete answer paper.
Explain any one method of illumination in underground mine.
Answer
Sign in to view the complete answer paper.
Explain about common types of flame safety lamps.
Answer
Sign in to view the complete answer paper.
Write a brief note on self-contained oxygen-breathing apparatus.
Answer
Sign in to view the complete answer paper.