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Engineering Properties of Rocks and Soils MCQs Questions & Answers | Geological Engineering

Learn and practice multiple-choice questions (MCQs) with answers related to Engineering Properties of Rocks and Soils. These resources are available for Geological engineering students who wish to clear GATE exams, technical interviews, competitive examinations, and other entrance exams. The Engineering Properties of Rocks and Soils chapter is particularly important for students studying Geological engineering. Page-7 section-1

61
Which rock property is most important in evaluating tunneling conditions?
Discuss
Answer & Solution
Answer: Option
Solution:
RQD provides a measure of rock mass quality based on the percentage of solid core pieces longer than 10 cm.It helps assess stability during tunneling.
62
The consistency of soil can be determined by:
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Answer & Solution
Answer: Option
Solution:
Penetrometer tests evaluate soil consistency and strength by measuring resistance to penetration.It is widely used in field testing.
63
Which type of soil has the highest capillarity?
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Answer & Solution
Answer: Option
Solution:
Silt has the highest capillary rise due to its intermediate grain size and pore space structure.Capillarity is lower in coarser or finer soils.
64
The term "bulking of sand" refers to:
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Answer & Solution
Answer: Option
Solution:
Bulking is the temporary increase in sand volume when it is moist, due to water films around particles.Important in concrete mix design.
65
The modulus of subgrade reaction is primarily used in:
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Answer & Solution
Answer: Option
Solution:
Modulus of subgrade reaction is used in pavement design to model the support provided by soil to structural layers above.
66
Which of the following best describes the permeability of clay?
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Answer & Solution
Answer: Option
Solution:
Clay has low permeability due to its small pore spaces and high water retention.It restricts water flow compared to sand or gravel.
67
The degree of saturation is defined as the ratio of:
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Answer & Solution
Answer: Option
Solution:
Degree of saturation = (Volume of water / Volume of voids) � 100%.It indicates how much of the soil's void space is filled with water.
68
In rock mechanics, the angle of repose is associated with:
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Answer & Solution
Answer: Option
Solution:
The angle of repose is the steepest angle at which material remains stable without sliding.It reflects internal friction among particles.
69
Which type of foundation is preferred for loose sandy soils?
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Answer & Solution
Answer: Option
Solution:
Pile foundations transfer loads to deeper, more stable soil or rock layers.They are effective in loose or weak soils.
70
The parameter most influenced by void ratio is:
Discuss
Answer & Solution
Answer: Option
Solution:
Void ratio directly affects how easily water flows through soil pores.Higher void ratios = higher permeability.