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GATE CE 2021: Soil Mechanics & Foundation Engineering#3
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Question 1
Which of the following is not correct?
Question 2
Given below is the 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 cohesion less soils include-
Question 3
What is the void ratio of a cohesive soil which yields a maximum dry unit weight of 17kN/m3 during a standard proctor compaction test. Take specific gravity 2.67.
Question 4
The wet mass of one of the standard proctor test sample is 1825 grams at a moisture content of 9%. For the sample volume of 9.56 x 10-4 m3, the dry and the bulk unit weight in (x 103 kN/m3) is
Question 5
Consider the following statements:
Compaction is the densification of a soil by the expulsion of air and rearrangement of soil particles.
1) High compactive effort decreases the maximum dry unit weight.
2) Compaction increases compressibility and rate of flow of water through soils.
3) Incresed Compactive effort reduces the optimum moisture content.
Which of these statement(s) is/ are correct?
Compaction is the densification of a soil by the expulsion of air and rearrangement of soil particles.
1) High compactive effort decreases the maximum dry unit weight.
2) Compaction increases compressibility and rate of flow of water through soils.
3) Incresed Compactive effort reduces the optimum moisture content.
Which of these statement(s) is/ are correct?
Question 6
Compaction of an embankment is carried out in 500 mm thick layers. The rammer used for compaction has a foot area of 0.05 sq. m and the energy imparted in every drop of rammer is 400 Nm. Assuming 50% more energy in each pass over the compacted area due to overlap, the number of passes required to develop compactive energy equivalent to Indian Standard Proctor Test for each layer would be
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Sep 14ESE & GATE CE
