Test: Soil Exploration


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10 Questions MCQ Test GATE Civil Engineering (CE) 2023 Mock Test Series | Test: Soil Exploration

Test: Soil Exploration for Civil Engineering (CE) 2023 is part of GATE Civil Engineering (CE) 2023 Mock Test Series preparation. The Test: Soil Exploration questions and answers have been prepared according to the Civil Engineering (CE) exam syllabus.The Test: Soil Exploration MCQs are made for Civil Engineering (CE) 2023 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Soil Exploration below.
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Test: Soil Exploration - Question 1

Consider the following statements:
1. The soil obtained from wash boring is a representative sample.
2. Recovery ratio will be high during drilling in sound rock.
3. Hollow stem augers are sometimes used to. drill holes in silty sand.
Which of these statements is/are correct?

Detailed Solution for Test: Soil Exploration - Question 1

Soil samples obtained from auger borings and wash borings are non-representative samples. Non­-representative samples consist of mixture of materials from various soil or rock strata or are samples from which some mineral constituents have been lost or got mixed up.

Test: Soil Exploration - Question 2

Consider the following statements:
On addition of lime to swelling soils,
1. their liquid limit increases
2. their plastic limit increases
3. their shrinkage limit increases
4. their swelling potential decreases
Which of these statements are correct?

Test: Soil Exploration - Question 3

During a sampling operation, the drive sampler is advanced 600 mm and the length of the sample recovered is 525 mm. What is the recovery ratio of the sample?

Detailed Solution for Test: Soil Exploration - Question 3

Recovery ratio is defined as,


This indicates (Rr < 1) that the sample is compressed.

Test: Soil Exploration - Question 4

Match List-I (Unit) with List-ll (Purpose) and select the correct answer using the codes given below the lists:
List-I
A. Graded filter
B. Lime treatment
C. Impervious clay core
D. Curtain grouting
List-ll
1. To reduce seepage of water through body of earth dam
2. To reduce water seepage through foundation below dam
3. To stabilize black cotton soils
4. To drain water without losing fines from the soil

Test: Soil Exploration - Question 5

Match List-I (Type of exploration) with List-ll (Soil profile) and select the correct answer using the codes given below the lists:
List-I
A. Diamond core drilling
B. Uncased wash boring
C. Open pit excavation
D. Cased boring
List-ll
1. Medium strong cohesive soils
2. Rocky formation
3. Soft cohesive soils and cohesionless soils. Exploration up to relatively large depths
4. Exploration up to a shallow depth below ground level

Test: Soil Exploration - Question 6

The correct sequence of the increasing order of the disturbance to soil samples obtained from chunk, piston, split spoon and remoulded sampler is

Detailed Solution for Test: Soil Exploration - Question 6

Piston sampler causes minimum disturbance and remoulded sampler tends to disturb the soil structure completely.

Test: Soil Exploration - Question 7

A soil sampler has inner and outer radii of 25 mm and 30 mm, respectively. The area ratio of the sampler is

Detailed Solution for Test: Soil Exploration - Question 7

Test: Soil Exploration - Question 8

Which technique of stabilization for sub base is preferred for heavy plastic soils?

Detailed Solution for Test: Soil Exploration - Question 8

The lime stabilised bases or sub-bases form a water resistant barrier which stops penetration of rain water.
For heavy plastic soils large quantity of asphalt and cement is required hence stabilization through bitumen and cement is not preferred.

Test: Soil Exploration - Question 9

Mechanical stabilization of the soil is done with the help of

Detailed Solution for Test: Soil Exploration - Question 9

Mechanical stabilisation is the process of improving the properties of the soil by changing its gradation. Two or more types of natural soil are mixed to obtain a composite material which is superior to any of its components. To achieve the desired grading, sometimes the soil with coarse particles are added or the soils with fine particles are removed.

Test: Soil Exploration - Question 10

The area ratio of sampler should not exceed

Detailed Solution for Test: Soil Exploration - Question 10

For obtaining good quality undisturbed samples, the area ratio should be 10 per cent or less.

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