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Engineering Geology Question Paper - Jun 19 - Civil Engineering (Semester 3) - Mumbai University (MU)
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Engineering Geology - Jun 19

Civil Engineering (Semester 3)

Total marks: 80
Total time: 3 Hours
INSTRUCTIONS
(1) Question 1 is compulsory.
(2) Attempt any three from the remaining questions.
(3) Draw neat diagrams wherever necessary.

1.a. Name the following

i)Two minerals which possess good cleavage

ii)Two non silicate minerals

iii)Two minerals with high specific gravity

iv)A mineral with cherry red streak and ore of iron

v)Name the minerals which occur in fibrous form and bladed form

(5 marks) 3226

1.b. Define the following terms

i)Solifluction

ii)Engineering Geology

iii)Volcanic Bomb

iv)Mesa

v)Aguiclude

(5 marks) 467 477

1.c. Draw diagram for the following

i)T Crater

ii)Gravity Dam

iii)Phacolith

iv)Conglomerate

v)Box fold

(5 marks) 463

1.d. Give reasons for the following

i)Movement of tectonic plates

ii)High seismicity in the northern part of India

iii)Clay is not a good aquifer despite having high porosity

iv)Development of columnar joints in basalt

v)Development of caves (karst topography and sink hole)in limestone

(5 marks) 00

2.a. What are glaciers? Describe various landforms created by glaciers.
(10 marks) 438

2.b. What are the plate boundaries? Describe divergent plate boundaries, in which part of the earth do you ex t them? Give examples.
(6 marks) 442

2.c. Briefly explain layered structure of the earth by giving thickness of each layer.
(4 marks) 00

3.a. Give classification of Igneous rocks
(5 marks) 00

3.b. What is texture? Explain any two textures of Igneous rocks
(5 marks) 446

3.c. Name structures of sedimentary rocks and describe any two in detail.
(5 marks) 143

3.d. Name the agents of metamorphism and describe dynamothermal metamorphism?
(5 marks) 448

4.a. What are Faults? Describe various types of faults and comment on their engineering consideration.
(10 marks) 452

4.b. Describe any two laws of statigraphy.
(5 marks) 00

4.c. An ore body of pyrite is exposed on a horizontal ground and dipping southward. The width of the outcrop is 300m A borehole sunk from the upper bedding plan touches the lower bedding plane at a depth of 250m Determine its true thickness and amount of Inclination
(5 marks) 00

5.a. What are the conditions required for any rock to be an aquifer,describe confined and Unconfined aquifer.
(6 marks) 468

5.b. Describe the favourable geological structures for dam.
(6 marks) 00

5.c. What is ROD? Calculate the RQD from given data and comment on the suitability of Rock for foundation based on your result.Total length of the core is 2m-

Sample No Length of the core in cms. Nature of the lower end of the core simple Sample No. Length of the core in cms. Nature of the lower end of the core sample
1 12 N 11 15 N
2 7 N 12 16 M
3 11 N 13 7 N
4 10 N 14 11 N
5 6 M 15 9 M
6 3 N 16 5 N
7 13 N 17 9 N
8 12 N 18 12 N
9 6 M 19 6 N
10 17 N 20 9 N

(8 marks) 00

6. Differentiate between any 5 of the following-

i)Tunnel axis parallel to dip and tunnel axis parallel to strike

ii)Angular unconformity and Disconformity

iii)Flowing well and non flowing well

iv)Mechanical weathering and chemical weathering

v)Overturned and recumbent fold

vi)Central eruption and fissure eruption

vii)Primary and secondary structures in rock

viii)Electrical resistivity and seismic method of geophysical exploration

(20 marks) 466 437 453 477

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