Questions and answers for exam Preparation

MCQs

Total Questions : 1204 | Page 2 of 121 pages

Question 11. Terzaghi’s theory of one dimensional consolidation assumes

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Answer: Option D. -> All the above

Question 12. Pick up the correct statement from the following:

The dry density reduces by addition of water after attaining optimum moisture content
The line joining the peak of three moisture content graphs obtained by using three compactive energies, is called line of optimus
Well graded coarse grained soils can be compacted to a very high density as compared to fine grained soils
All the above

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Answer: Option D. -> All the above

Question 13. Pick up the correct statement from the following:

The object of classifying soils is to arrange them into groups according to their properties and behaviour
A soil classification system is meant to provide an accepted and systematic method of describing the various types of soils eliminating personal factors
The first category of soil classification is based on grain size of the soil
All the above

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Answer: Option D. -> All the above

Question 14. Coefficient of compressibility is

constant for any type of soil
different for different types of soils and also different for a soil under different states of consolidation
different for different types of soils but same for a soil under different states of consolidation
independent of type of soil but depends on the stress history of soil

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Answer: Option B. -> different for different types of soils and also different for a soil under different states of consolidation

Question 15. Coefficient of consolidation for clays normally

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Answer: Option A. -> decreases with increase in liquid limit

Question 16. Select the incorrect statement.

In a direct shear box test, the plane of shear failure is predetermined
Better control is achieved on the drainage of the soil in a tri-axial compression test
Stress distribution on the failure plane in the case of tri-axial compression test is uniform
Unconfined compression test can be carried out on all types of soils

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Answer: Option D. -> Unconfined compression test can be carried out on all types of soils

Question 17. Select the correct statement.

A uniform soil has more strength and stability than a non-uniform soil.
A uniform soil has less strength and stability than a non-uniform soil.
Uniformity coefficient does not affect strength and stability.
Uniformity coefficient of a poorly graded soil is more than that of a well graded soil.

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Answer: Option B. -> A uniform soil has less strength and stability than a non-uniform soil.

Question 18. Select the incorrect statement.

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Answer: Option A. -> Bearing capacity of a soil depends upon the amount and direction of load.

Question 19. Select the incorrect statement.

Effective cohesion of a soil can never have a negative value.
Effective angle of internal friction for coarse grained soils is rarely below 30°
Effective angle of internal friction for a soil increases as state of compact-ness increases.
Effective angle of internal friction is a complicated function of mineralogy and clay size content.

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Answer: Option A. -> Effective cohesion of a soil can never have a negative value.

Question 20. Select the correct statement.

coefficient of compressibility of an over-consolidated clay is less than that of a normally consolidated clay
coefficient of compressibility of an over-consolidated clay is greater than that of a normally consolidated clay
coefficient of compressibility is cons-tant for any clay
none of the above

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Answer: Option A. -> coefficient of compressibility of an over-consolidated clay is less than that of a normally consolidated clay