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Test: Soil Compaction - Civil Engineering (CE) MCQ


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10 Questions MCQ Test GATE Civil Engineering (CE) 2025 Mock Test Series - Test: Soil Compaction

Test: Soil Compaction for Civil Engineering (CE) 2024 is part of GATE Civil Engineering (CE) 2025 Mock Test Series preparation. The Test: Soil Compaction questions and answers have been prepared according to the Civil Engineering (CE) exam syllabus.The Test: Soil Compaction MCQs are made for Civil Engineering (CE) 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Soil Compaction below.
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Test: Soil Compaction - Question 1

Match List-I (Equipment) with List-ll (Purpose) and select the correct answer using the codes given below the lists:
List-l
A. Sheep foot roller
B. Frog hammer
C. Vibratory roller
List-ll
1. To density cohesionless soils to relatively larger depths
2. To compact lumpy cohesive soil fills
3. To compact soils at corners and places which bigger rollers cannot access
4. To compact cohesionless soils of shallow depth

Detailed Solution for Test: Soil Compaction - Question 1
  • Frog hammers are used to compact soils in confined areas and at corners e.g., back of retaining wall, etc.
  • Soil densification techniques are used for reducing liquefaction hazards is to avoid large increases in pore water pressure during earthquake shaking.
  • Vibrofloatation involves the use of a vibrating probe that can penetrate granular soil to depths of over 100 feet.
  • The vibrations of the probe cause the grain structure to collapse thereby density the soil surrounding the proble.
  • To treat area of potentially liquefiable soil, the vibroflot is raised and lowered in a grid pattern.
Test: Soil Compaction - Question 2

When the compactive effort is increased in a standard compaction test, the Optimum Moisture Content (OMC)

Detailed Solution for Test: Soil Compaction - Question 2

The effect of increasing the amount of compactive effort is to increase the maximum dry density and to decrease the optimum water content.

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Test: Soil Compaction - Question 3

Compaction of soil is measured in terms of

Detailed Solution for Test: Soil Compaction - Question 3

Max dry density is achieved after the suitable compaction method at certain moisture content.

Test: Soil Compaction - Question 4

Vibro floatation techniques is best suited for densifying

Detailed Solution for Test: Soil Compaction - Question 4

Vibroflotation is most suitable for very loose sands submerged under water table. Efficiency of densification reduces with increase in silt and clay content and penetration rate reduces in case of dense sands with deep water tables.

Test: Soil Compaction - Question 5

Match List-I (Roller type) with List-ll (Soil type) and select the correct answer using the codes given below the lists:
List-I
A. Pneumatic roller
B. Smooth wheeled roller
C. Sheep foot roller
D. Vibratory roller
List-II
1. Cohesive and granular soils
2. Plastic soils of moderate cohesion
3. Cohesionless soils
4. Silty soils of low plasticity

Test: Soil Compaction - Question 6

Given below are methods of compaction:
1. Vibration technique
2. Flooding the soil
3. Sheep foot roller
4. Tandem roller
5. Heavy weights dropped from a height
The methods suitable for cohesionless soils include

Detailed Solution for Test: Soil Compaction - Question 6

Cohesionless soils can be compacted by vibration; flooding and dropping heavy weight from height. Kneading and tamping actions provided by sheeps foot roller and tandem roller are not effective for cohesionless soils.

Test: Soil Compaction - Question 7

The unit weight of a soil at zero air voids depends on

Detailed Solution for Test: Soil Compaction - Question 7

Unit weight at zero air void corresponds to dry density of soil.

∴ it depends on specific gravity, water content and unit weight of water.

Test: Soil Compaction - Question 8

An increase in compactive effort will lead to which of the following?​

Detailed Solution for Test: Soil Compaction - Question 8

For a given type of compaction, the higher the compactive effort, the higher the maximum dry unit weight and lower the optimum moisture content.

Test: Soil Compaction - Question 9

Clayey soils are best compacted by

Detailed Solution for Test: Soil Compaction - Question 9

Test: Soil Compaction - Question 10

Soil is compacted at which one of the following when a higher compactive effort produces highest increase in dry density?

Detailed Solution for Test: Soil Compaction - Question 10

With increase in compactive effort, the optimum moisture content decrease and dry density increases. Thus soil is to be compacted on the dry side of the optimum moisture content of original (lower compactive effort) Proctor curve.

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