GEOL/IV/EC/07 Student's Copy
2 0 1 8
CBCS
4th Semester
GEOLOGY
FOURTH PAPER
Economic and Applied Geology
Full Marks 75
Time 3 Hours
PART A—OBJECTIVE
Marks 25
The figures in the margin indicate full marks for the questions
SECTION—A
Marks 10
Tick the correct answer in the brackets provided 1×10=10
1. The rock which has to be removed during normal course of mining is called
grade
tenor
waste
gangue
2. A mineral deposit that is sufficiently rich to be worked at a profit is
ore mineral
ore deposit
mineral deposit
metallic deposit
3. The vertical opening in the mine which serves as entry is known as
shaft
adits
cross-cut
drift
/346 1 Contd.
4. The minimum percentage at which mining is profitable is known as
average grade
cut-off grade
mill grade
economic grade
5. The difference between equatorial and polar radii of the earth is
12 km
21 km
35 km
43 km
6. Which of the following minerals is non-radioactive?
Monazite
Uranite
K-feldspar
Quartz
7. The most suitable structure in construction of tunnel is
when tunnel axis is parallel to the dip of the bed
in syncline
thin horizontal layer with groundwater above the tunnel
axis
Both and
8. The range of wavelength of white light vibration is
0·4-0·7 micron
0·4-0·6 micron
0·5-0·7 micron
0·5-0·6 micron
9. Which of the following rocks is having highest porosity?
Schist
Shale
Basalt
Sandstone
10. 36Cl has a half-life period of
301,000 years
5730 years
12·38 years
30 years
GEOL/IV/EC/07/346 2 Contd.
SECTION—II
Marks 15
Write on the following, taking one from each Unit 3×5=15
Unit—I
1. Sublimation
2. Grade of ore
Unit—II
3. Strip mining method
4. Dredging mining
Unit—III
5. Physical parameters of geophysical exploration
6. Anomaly map
Unit—IV
7. Compressive strength and tensile strength
8. Nadir point, and active and passive remote sensing
Unit—V
9. 14C dating method of groundwater
10. Precipitation and infiltration
PART B—DESCRIPTIVE
Marks 50
The figures in the margin indicate full marks for the questions
Answer five questions, selecting one from each Unit
UNIT—I
1. Describe the relationship between plate tectonics and mineral deposits. 10
2. Write on any two of the following 5×2=10
Hydrothermal process
Magmatic concentration
Oxidation
GEOL/IV/EC/07/346 3 Contd.
UNIT—II
3. Discuss different techniques employed in underground mining. 10
4. Write notes on the following 5+5=10
Scope of mining geology
Role of geologists in mineral exploration
UNIT—III
5. Describe any one method of geophysical exploration. Also mention its
application in geophysical exploration. 8+2=10
6. Write notes on the following 5+5=10
Brief idea about geochemical exploration
Geobotanical indicators
UNIT—IV
7. Give a detailed account of geological consideration in construction of dam
and bridge. 10
8. Define aerial photograph. Also add notes on any two of the following 10
Types of aerial photograph according to orientation of camera axis
Pocket and mirror stereoscopes
Photographic tone in aerial photography
UNIT—V
9. Describe the hydrogeological cycle with the help of diagram. 10
10. Write notes on the following 5+5=10
Types of aquifers
Vertical distribution of groundwater