Download GTU BE/B.Tech 2019 Winter 3rd Sem New 2130606 Geotechnics And Applied Geology Question Paper

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Subject Code: 2130606

GUJARAT TECHNOLOGICAL UNIVERSITY

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Instructions:

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1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.

Q.1 (a) Pick up the most appropriate answer. (Write full sentence) 03

1. A pycnometer is used to determine :
   

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   (a) void ratio (b) dry density (c) water content (d) specific gravity
2. If the volume of voids is equal to the volume of solids in a soil, then the value of porosity and void ratio are respectively
   (a)1.0 and 0 (b) 0 and 1 (c) 0.5 and 1 (d) I and 0.5
3. The consistency of cohesive soil is affected by:
   (a) water content (b) particle size distribution
   

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   (c) density index (d) all of the above.

(b) Write physical properties of a mineral and explain any two of them. 04

(c) Explain three phase soil system and derive the relation between void ratio and porosity. 07

Q.2 (a) Define plasticity index and classify the soil as per plasticity 03

(b) Explain the plasticity chart. 04

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(c) The porosity of a soil sample is 35 % and the specific gravity of its particle is 2.70. Calculate its void ratio, dry density, submerged density and saturated density. 07

OR

(c) (i) Discuss the factors affecting permeability. 03

(ii) Determine the co-efficient of permeability from following data: 04
Length of the soil sample = 25 cm; head of water = 40 cm,

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Q.3 (a) Describe the types of soil water. 07

(b) State Darcy’s law and critically explain its validity. 03

(c) For which type of soils, constant head and falling head permeability tests are performed? Write step by step procedure to perform falling head permeability test in the laboratory. 07

OR

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Q.3 (a) Enlist the weathering and erosion agents of soil mass. 03

(b) Answer the following. (Write fill sentence) 04

1. A sandy soil does not experience shrinkage. (Agree/Disagree)
2. Uniform gradation is an indication of well graded soil. (True/False)
3. Height of capillary is more in . (Sand/Clay)

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4. Write the relationship between dry density, bulk density and water content.

(c) With neat sketch, explain the internal structure of earth. 07

Q.4 (a) Explain principles of stratigraphy. 03

(b) Draw particle size distribution curve for different types of soil and comment on it. 04

(c) Give the classification of faults based on apparent movement. 07

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OR

(b) Define aquifer. How they are classified and formed? 04

(c) Explain remote sensing and its application in engineering geology. 07

Q.5 (a) Define and explain folds with neat sketch. 03

(b) What are sedimentary rocks? What are its typical characters? 04

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(c) What are land slides? How they are caused? Discuss the remedial measures for prevention of land slides. 07

OR

Q.5 (a) Write a short note on the geological time scale. 03

(b) Explain metamorphism and agents responsible for it. 04

(c) What are the advantages and limitations of GIS? 07

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