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SSC JE 2019-20: Soil Mechanics Quiz 5 (App update required to attempt this test)

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Question 1

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?

Question 2

Find out the amount of soil required to be excavated from a borrow pit in cubic meter. If the voids ratio of the borrow pit is found to be 1.4. assume the volume of the fill is 150000 cum and the voids ratio of the fill is 0.8.

Question 3

The curves A, B & C are stress strain curves for
100%

Question 4

The relative compaction of a granular soil road base in- situ is 85%. The maximum and the minimum dry unit weight of the sample are 19.4 kN/m3 and 13.2 kN/m3. Determine the bulk unit weight in field when its moisture content is 17%.

Question 5

Two series of compaction tests were performed in the laboratory on an inorganic clayey soil employing two different levels of compaction energy per unit volume of soil. With regard to the above tests, the following two statements are made.
I. The optimum moisture content is expected to be more for the tests with higher energy.
II. The maximum dry density is expected to be more for the tests with higher energy.
The CORRECT option evaluating the above statements is

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

Question 7

The in-situ void ratio of a granular soil deposit is 0.50. The maximum and minimum void ratio of the soil were determined to be 0.75 and 0.35, GS = 2.67. Determine the relative density and relative compaction (in %).

Question 8

Deposit with flocculated structure is formed when

Question 9

If the depth of moist sand in a cylinder is 15 cm and the depth of the sand when fully inundated with water is 12 cm, then what is the bulking of the moist sand?

Question 10

Which of the following roller is used to compact the coarse-grained soil?
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