10MN52 Mine Environmental Engineering-I B.E Question Paper : drttit.gvet.edu.in

Name of the College : Dr T Thimmaiah Institute of Technology
University : Visvesvaraya Technological University
Department : Mining Engineering
Degree : B.E
Subject Code/Name : 10MN52/Mine Environmental Engineering – I
Sem : IV
Year : June/July 2014
Website : drttit.gvet.edu.in
Document Type : Question Paper

Download Model/Sample Question Paper : https://www.pdfquestion.in/uploads/drttit.gvet.edu.in/5859-June14-10mn52.pdf

Mine Environmental Engineering – I Question Paper :

Fifth Semester B.E. Degree Examination, June / July 2014 :
Time: 3 hrs.
Max. Marks: 100

Related : Dr T Thimmaiah Institute of Technology 10MN45 Mine Surveying-I B.E Question Paper : www.pdfquestion.in/5858.html

Note: Answer FIVEfull questions, selecting at least TWO questions from each part.
PART-A :
a. Explain the typical analysis of atmospheric air represents the intake air and return any mine airway. (10 Marks)
b. Explain the following underground mine gases and their occurrence, properties, detection and physiological effects
i) 02 ii) CO2 iii) CO (10 Marks)

2 a. Explain the methods of methane drainage in coal mine with neat sketch. (10 Marks)
b. Draw neat sketch of safety lamp. (10 Marks)
3 a. Explain the effects of heat and humidity on the mines. (10 Marks)
b. Explain the cooling power of mine air in underground mine. (10 Marks)

4 a. Explain the following:
i) Fundamentals of air flow.
ii) Reynolds number.
iii) Laminar flow through pipes. (10 Marks)

b. Explain the laws of mine air friction in underground mine. (04 Marks)
c. What is the water gauge required to pass 1500 rrr’ of air I minute through an airway of 2.5m x 3m cross section and 2000 m long. [Equal to 0.001 kilomurg]. (06 Marks)

PART-B :
5.a. Explain the following natural ventilation in underground mine:
i) Ascensional ventilation.
ii) Descensional ventilation.
iii) Homotropal ventilation. (10 Marks)

b. A total quantity of 100 m3/min of air is passing through two splits an airway is,
i) 2.5 m x l.5 m and 100 m long.
ii) 2 m x l.5 m and 125 m long.
Calculate the quantity of air passing in each split. (10 Marks)

6 a. Explain types of Fans are used in underground mine and draw neat sketch of centrifugal fan. (10 Marks)
b. Explain the characteristic curves of forceing and exhaust fan used in underground mine. (10 Marks)
7 Explain the importance of ventilation survey in underground mine:
a. Pressure survey
b. Quantity survey
c. Quality survey (20 Marks)

8 a. Explain the objective of ventilation planning (10 Marks)
b. Explain the types of ventilation system in underground mine. (10 Marks)

Fifth Semester B.E. Degree Examination, June/July 2016 :
Mine Environmental Engineering – I ;
Time : 3 hrs.
Max. Marks : 100
Note : Answer any FIVE full questions, selecting atleast TWO questions from each part.

Part-A :
1 Explain any three Mine Gases with their occurrence, properties, Detection, Measurement and Physiological effects. (20 Marks)
2 a. Write short notes on :
i) Degree ofGasiness ii) Dealing of Firedamp in Mines
b. Explain the Testing of Firedamp in Mines by FSL. (10 Marks)
iii) Methans Drainage. (10 Marks)

3 a. Explain the sources of heat in Mines. (08 Marks)
b. Explain the procedures involved in measuring the Relative Humidity, Cooling power of Mine Air and Velocity of air with a neat sketch. (12 Marks)

4 a. Explain the laws of Mine air Friction.
b. Explain with a neat sketch of Air crossing and Regulator.

Part-B :
5 a. Explain the causes of Natural Ventilation pressure.
b. Explain the calculation ofN.V.P from Air Densities.

c. Calculate the NVP in a mine the following data : Depth of Mine = 300m, Pit – bottom barometer reading = 101.27 KPa ,Pit-top barometer reading = 98.10 KPa, Average temperature in D.C. Shaft = 304K , Average temperature in U.C shaft = 307K. (06 Marks)

6 a. Explain the Theory of Centrifugal Fans.
b. Explain the Axial Flow Faces with a neat sketch.

7 Explain the Qualitative, Surveying, Pressure Survey and Quantity Survey. (20 Marks)
8 a. Explain the steps in ventilation planning.
b. Explain the Desirable features ofa ventilation system.

Fifth Semester B.E. Degree Examination, Dec.2013/Jan.2014 :
Mine Environmental Engineering – I :
Time : 3 hrs.
Max. Marks : 100
Note : Answer FIVE full questions, selecting at least TWO questions from each part.
Part-A :
1. Explain any four mine gases with their occurrence detection and physiological effects. (20 Marks)
2 a. Write short notes on
(i) Methane drainage.
(ii) Methane layering.
b. Explain the detection of fire damp in a coal mine by safety lamp.

3 a. Explain the physiological effects of heat and humidity on the mines.
b. With a neat sketch, explain kata thermometer.
4 a. Explain the laws of mine air friction.
b. Explain the air flow in mine by ascentional and descensional ventilation.

Part-B :
5.a. What is natural ventilation? How it can be done?
b. Write short notes :
(i) Coward’s diagram.
(ii) Reynold’s number.

6 a. Draw a neat sketch of centrifugal fan and explain its working.
b. Explain the “characteristics curves”.
7 Explain the need for ventilation survey by:
a. Pressure survey
b. Quantity survey
c. Qualitative survey. (20 Marks)

8 a. Explain the objectives of ventilation planning.
b. Write short note on
(i) Erases
(ii) Boosterfon.