Total number of printed pages: 3.
IV/BT/CE-403
2017
(June)
Engineering Geology & Rock Mechanics
Full Marks: 60
Pass Marks: 21
Time Allowed: 3 Hours
* The figures in the margin indicate full marks for the questions.
* Answer any Five Questions.
1. (a) What is geomorphology? Describe the internal structure &
composition of earth with diagram.
(b) Describe the work done by running water.
2+4=6
6
2. (a) Name the relative hardness of mineral according to Moh’s
scale? What are the types of fracture appears on mineral? 3+3=6.
(b)What are igneous rocks? What are the types of igneous
rocks? Describe outcrop, bedding or stratification? 1+ 1+ 4 = 6.
3. (a)What is dip and strike? Describe the parts of a fold.
3+ 3.
(b) A rock sample has a bulk density of 2.92 gm/cc. Its moisture
4 ×3 =12
8. Write short note
content was found to be 2.3 %. Determine the dry density of the
a) Gravity dam and Arc dam
sample.
b) Angular conformity & disconformities
6
4. (a) Describe the physical & mechanical properties of rocks. 6
d) Erosion by wind
(b) How faults develop in rocks? Describe the parts of a fault
with proper diagram.
3+3=6
5. (a) What is seismic wave? Name its types. Discuss how focus
and epicentre can be measured.
3+3 =6
(b) How magnitude and intensity of an earthquake is determined?
6
6. (a) How pumping of an well is calculated. What is unconfined
and confined aquifer?
3+3= 6
(b) What is infiltration? Mention factors affecting infiltration.
6
7. (a) Describe resistivity method of sub surface investigation. 6
(b) What is refraction method and seismic method of sub surface
investigation?
c) Aquifer, aquiclude and aquifuge
6
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