Geography

Soil and Foundation Engineering

584 Questions

Soil and foundation engineering questions address the physical and mechanical properties of soil critical for construction and stability. The topics include shear strength, soil compaction, void ratios, and subsurface investigation techniques. These advanced geotechnical concepts are typically evaluated in civil engineering and specialized recruitment examinations.

Soil compactionShear strengthBearing capacityVoid ratio analysisSubsurface exploration

Soil and Foundation Engineering Questions

Multiple choice

As per the Lacey’s method for design of alluvial channels, identify the true statement from the following.

  1. Wetted perimeter increases with an increase in design discharge.

  2. Hydraulic radius increases with an increase in silt factor.

  3. Wetted perimeter decreases with an increase in design discharge.

  4. Wetted perimeter increases with an increase in silt factor.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

 As per Lacey's method perimeter $ P = 4.75 \sqrt{Q}$ So, as the wetted perimeter increases design discharge also increases.

Multiple choice

The consumptive use of water for a crop during a particular stage of growth is 2.0 mm/day. The maximum depth of available water in the root zone is 60 mm. Irrigation is required when the amount of available water is 50% of the maximum available water in the root zone. Frequency of irrigation should be

  1. 10 days

  2. 15 days

  3. 20 days

  4. 25 days
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

 $C_u = 2.0 mm/day \\ \text{Net available moisture level = 0.5 x 60 x = 30 mm} \\ \text{Frequency of irrigation} = \frac{30}{2} = 15 days$

Multiple choice

The number of blows observed in a Standard Penetration Test (SPT) for different penetration depths are given as follows:

 
Penetration of sampler Number of blows
0-150 mm 6
150-300 mm 8
300-450 mm 10

The observed N value is

  1. 8

  2. 14

  3. 18

  4. 24
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

 In standard penetration test (SPT), the number of blows required for first 15 cm penetration is no counted and treated as sheeting apparatus inside the soil and total number of blows for next two 15 cm blows is taken into account for the calculation of standard penetration test. So, N = 8 + 10 = 18

Multiple choice

The culturable command area for a distributary channel is 20,000 hectares. Wheat grown in the entire area and the intensity of irrigation is 50%. The kor period for wheat is 30 days and the kor water depth is 120 mm. The outlet discharge for the distributary should be

  1. 2.85 m3/s

  2. 3.21 m3/s

  3. 4.63 m3/s

  4. 5.23 m3/s
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Duty (D) = 8.64 * B / Delta. Here, B = 30 days, Delta = 0.12 m. D = 8.64 * 30 / 0.12 = 2160 ha/cumec. Area = 20,000 * 0.5 = 10,000 hectares. Discharge = Area / D = 10,000 / 2160 = 4.63 m^3/s.

Multiple choice

Match the following tests on aggregate and its properties.

TEST PROPERTY
P. Crushing Test 1. Hardness
Q. Los Angeles abrasion test 2. Weathering
R. Soundness test 3. Shape
S. Angularity test 4. Strength

  1. P - 2, Q - 1, R - 4, S - 3

  2. P - 4, Q - 2, R - 3, 5 - 1

  3. P - 3, Q - 2, R - 1, S - 4

  4. P - 4, Q - 1, R - 2, S - 2
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Crushing test measures strength (P-4). Los Angeles abrasion measures hardness (Q-1). Soundness measures weathering (R-2). Angularity measures shape (S-3). The correct mapping is P-4, Q-1, R-2, S-3. Option D matches P-4, Q-1, R-2, S-2 (typo in S).