Download GTU BE/B.Tech 2019 Winter 6th Sem New 2162204 Mine Hazards Question Paper

Download GTU (Gujarat Technological University) BE/BTech (Bachelor of Engineering / Bachelor of Technology) 2019 Winter 6th Sem New 2162204 Mine Hazards Previous Question Paper

1
Seat No.: ________ Enrolment No.___________

GUJARAT TECHNOLOGICAL UNIVERSITY

BE - SEMESTER ? VI (New) EXAMINATION ? WINTER 2019
Subject Code: 2162204 Date: 06/12/2019

Subject Name: Mine Hazards

Time: 02:30 PM TO 05:00 PM Total Marks: 70

Instructions:

1. Attempt all questions.

2. Make suitable assumptions wherever necessary.

3. Figures to the right indicate full marks.


MARKS

Q.1 (a) Explain: How can fire be an incident? 03
(b) How dust formation happens in mines? How to prevent it? 04
(c) What are the factors that affect the inflammability in coal dust
explosion?
07
Q.2 (a) Write a short note on Accidental fires. 03
(b) How is recovery carried out in case of explosion? 04
(c) List out types of fire extinguishers. Explain foam extinguisher with neat
sketch.
07
OR
(c) Write the different types of classes of fires. 07
Q.3 (a) Write short note on methane layering. 03
(b) Explain the causes due to spontaneous heating in opencast mines and
underground mines.
04
(c) Describe: Detection and Prevention of Spontaneous Combustion. 07
OR
Q.3 (a) Define the following: (1) Stope (2) Winze (3) Raise. 03
(b) Describe the water blast danger & its prevention. 04
(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
(b) Explain Chemical oxygen breathing apparatus. 04
(c) Explain Proto-IV self contained breathing apparatus with diagram. 07

OR
Q.4 (a) Describe the basic fundamental of cut & fill method. 03
(b) How can problem of radiation in atomic mineral mines be reduced? 04
(c) Write note on physical and chemical characteristics of coal liable to
spontaneous heating.
07
Q.5 (a) What are the uses of Fire Extinguisher? 03
(b) Write note on Firefighting Organization. 04
(c) What are various methods of reopening mines? 07
OR

Q.5 (a) Define the following : (1) Cross ? Cut (2) Lateral (3) Ore Drive 03
(b) Explain Coward's diagram. 04
(c) List out carbon monoxide detectors and explain any two. 07
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