Explore topic-wise MCQs in Soil Mechanics.

This section includes 13 Mcqs, each offering curated multiple-choice questions to sharpen your Soil Mechanics knowledge and support exam preparation. Choose a topic below to get started.

1.

Water is flowing at a rate of 0.04 m3/s in a soil sample of 12m thick and cross section of 50m2. The coefficient of permeability is 1.6*10-3m/s. The submerged unit weight =9.59 kN/m3. Calculate the effective pressure if flow is in downward direction.

A. 73.94 kN/m<sup>2</sup>
B. 152.34 kN/m<sup>2</sup>
C. 155.34 kN/m<sup>2</sup>
D. 173.94 kN/m<sup>2</sup>
Answer» E.
Discussion
2.

If the discharge velocity is 1.35*10-2cm/s and seepage velocity is 3.95*10-2cm/s of water through a soil, then what will be its voids ratio?

A. 0.32
B. 0.43
C. 0.52
D. 0.66
Answer» D. 0.66
Discussion
3.

If a soil has a voids ratio of 0.68 and water percolating through it has a discharge velocity of 1.35*10-2cm/s. Calculate its seepage velocity.

A. 1.35*10<sup>-2</sup>cm/s
B. 2.35*10<sup>-2</sup>cm/s
C. 3.34*10<sup>-2</sup>cm/s
D. 1.05*10<sup>-2</sup>cm/s
Answer» D. 1.05*10<sup>-2</sup>cm/s
Discussion
4.

A soil has voids ratio of 0.78 and critical gradient at which quick sand condition occurs is 0.94. Calculate the specific gravity.

A. 2
B. 2.5
C. 2.67
D. 2.71
Answer» D. 2.71
Discussion
5.

Water is flowing at a rate of 0.04 m3/s in a soil sample of 12m thick and cross section of 50m2. The coefficient of permeability is 1.6*10-3m/s. The submerged unit weight =9.59 kN/m3. Calculate the effective pressure if flow is in upward direction.

A. 50.76 kN/m<sup>2</sup>
B. 52.34 kN/m<sup>2</sup>
C. 55.34 kN/m<sup>2</sup>
D. 56.22 kN/m<sup>2</sup>
Answer» E.
Discussion
6.

Water is flowing at a rate of 0.04 m3/s in a soil sample of 12m thick and cross section of 50m2. The coefficient of permeability is 1.6*10-3m/s. What will be the seepage force per unit volume?

A. 4.9 kN/m<sup>3</sup>
B. 3.9 kN/m<sup>3</sup>
C. 4.1 kN/m<sup>3</sup>
D. 3.2 kN/m<sup>3</sup>
Answer» B. 3.9 kN/m<sup>3</sup>
Discussion
7.

Water is flowing at a rate of 0.04 m3/s in a soil sample of 12m thick and cross section of 50m2. The coefficient of permeability is 1.6*10-3m/s. What will be the seepage force?

A. 2943kN
B. 3453kN
C. 2454kN
D. 2443kN
Answer» B. 3453kN
Discussion
8.

Water is flowing at a rate of 0.04 m3/s in a soil sample of 12m thick and cross section of 50m2. The coefficient of permeability is 1.6*10-3m/s. What will be the seepage pressure?

A. 50.76 kN/m<sup>2</sup>
B. 52.34 kN/m<sup>2</sup>
C. 55.34 kN/m<sup>2</sup>
D. 58.86 kN/m<sup>2</sup>
Answer» E.
Discussion
9.

Calculate the height of water table rise in soil mass from a sand stratum of 12m deep from ground level, at which the effective pressure is zero. The water percolates through a soil mass of thickness 5m. The sat=18.6 kN/m3 and w=9.81 kN/m3.

A. 7.68m
B. 9.48m
C. 5.24m
D. 10m
Answer» C. 5.24m
Discussion
10.

If a soil has a submerged unit weight of 10.69 kN/m3, what will be its critical hydraulic gradient?

A. 1.09
B. 0.88
C. 1.77
D. 1.66
Answer» B. 0.88
Discussion
11.

A coarse-grained soil has a voids ratio of 0.66 and specific gravity G of 2.65. What will be its critical hydraulic gradient?

A. 0.99
B. 0.88
C. 0.77
D. 0.66
Answer» B. 0.88
Discussion
12.

The critical hydraulic gradient ic is unity when the specific gravity G=2.67 and voids ratio e is ______

A. 0.67
B. 0.33
C. 0.43
D. 0.80
Answer» B. 0.33
Discussion
13.

The critical hydraulic gradient ic in terms of specific gravity G and voids ratio e is given by ______

A. Ge
B. G/e
C. ( frac{G-1}{1+e} )
D. ( frac{G+1}{1-e} )
Answer» D. ( frac{G+1}{1-e} )
Discussion