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

A clayey soil has a maximum dry density of 16 kN/m3 and optimum moisture content of 12%. A contractor during the construction of core of an earth dam obtained the dry density 15.2 kN/m3 and water content 11%. This construction is acceptable because.

  1. the density is less than the maximum dry density and water content is on dry side of optimum.

  2. the compaction density is very low and water content is less than 12%.

  3. the compaction is done on the dry side of the optimum.

  4. both the dry density and water content of the compacted soil are within the desirable limits
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

 

Multiple choice

Which of the following statement is NOT true in the context of capillary pressure in soils ?

  1. Water is under tension in capillary zone

  2. Pore water pressure is negative in capillary zone

  3. Effective stress increases due to capillary pressure

  4. Capillary pressure is more in coarse grained soils
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

 Void ratio and size of voids is less in fine grained soil than coarse grained soil hence capillary size will be more in fine grained soil and less in coarse grained soil.

Multiple choice

Root time method is used to determine

  1. T, time factor

  2. cv' coefficient of consolidation

  3. av' coefficient of compressibility

  4. mv' coefficient of volume compressibility
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

 

Multiple choice

There are two footings resting on the ground surface. One footing is square of dimension 'B'. The other is strip footing of width 'B'. Both of them are subjected to a loading intensity of q. The pressure intensity at any depth below the base of the footing along the centerline would be

  1. equal in both footings

  2. large for square footing and small for strip footing

  3. large for strip footing and small or square footing
  4. more for strip footing at shallow depth ($\leq$ B) and more for square footing at large depth (>B)
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

 $\text{Large for strip footing and small for square footing}\\ L/b \text{ for square footing = 1}\\ L/b\text{ for strip footing = }\infty \\ \therefore \hspace{2.3cm}I_{strip}>I_{square}$

Multiple choice need of water transport in plants biology

When the temperature of soil is $0^o$C then.

  1. The absorption of water increases

  2. The absorption of water is not affected by temperature

  3. The absorption of water decreases

  4. The soil will lose capillary water
Reveal answer Fill a bubble to check yourself
A Correct answer
Multiple choice need of water transport in plants biology

Choose the correct answers from the alternatives given.
Field capacity is

  1. The same as permanent wilting point

  2. The amount of water in soil after drainage takes place

  3. Higher for sandy soils than clay soils

  4. The amount of water in soil available to plants
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Field capacity is the amount of soil moisture or water content held in the soil after excess of water has been drained out. Wilting point or permanent wilting point is the minimal amount of soil moisture that is required by the plant not to wilt. This is not the same as field capacity because sometimes drainage of water occurs more than required that causes wilting and even death of the plant.

Hence, the correct answer is 'The amount of water in the soil after drainage takes place'.

Multiple choice biology properties of natural resources properties of soil soil pollution and its effects soil and soil pollution

Water logging of soil makes it physiologically dry because

  1. This condition does not allow the capillary force to work.

  2. This condition does not allow oxygen to enter the soil.

  3. Both A and B.

  4. None of the above.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The soil needs to be aerated and watered properly to allow proper growth and development of the plants. When the plants are watered frequently or the water is not drained properly, then the water logging takes place. Due to the accumulation of the water in the soil, the oxygen cannot enter into the soil and in the roots of the plants. This results in the death of the plants. 

Thus, the correct answer is option B. 

Multiple choice transpiration major activities of living organisms biology

Percolation of soil water to water table occurs through

  1. Micropores less than 0.2 $\mu $m
  2. Micropores between 0.2 to 20.0 $\mu $m
  3. Macropores between 20-50 $\mu $m
  4. Macropores bigger than 50 $\mu $m
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Infiltration is downward entry of water into the soil whereas percolation is the downward flow of water through soil. Percolated water reaches deep in the soil to water table. Percolation of water first occurs through macropores that are bigger than 50 micron. These are present between soil particles and microspores. Later, percolation occurs through microspores.

Thus, the correct answer is option D.

Multiple choice geography rivers rivers and their work exogenic forces exogenic processes part-1

Consider the following statements and select the  correct answer using the code given below:
1. In a trellis drainage pattern the tributaries of a river join approximately at right angles.
2. A rectangular drainage pattern develops on a strongly jointed rocky terrain.

  1. Only 1 is correct

  2. Only 2 is correct

  3. Both 1 and 2 are correct

  4. Neither 1 nor 2 is correct
Reveal answer Fill a bubble to check yourself
B Correct answer
Multiple choice biology transport in plant transport of water and minerals conduction of water and minerals absorption of water and minerals in plants

The absorption of water is not affected when

  1. Soil is waterlogged (poorly aerated)

  2. Soil temperature increases

  3. Soil solution is highly concentrated

  4. Soil water is available in maximum
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Absorption of water occurs via root hairs of roots through diffusion of water from high concentration to lower concentration.

Because transpiration pull induces the absorption of water. Thus when there is a scarcity of water inside the plant it absorbs water and it is not affected by maximal soil water present in the soil. 
So the correct answer is 'Soil water is available in maximum'.

Multiple choice evs soil- our life soil profile soil and crops soil - types, uses and need for conservation

Water holding capacity of the soil depends upon 

  1. Chemical composition of soil

  2. Particle size of soil

  3. Aggregation of soil particle

  4. All of these
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The quantity of water soil can retain after flowing down of the gravitational water is called its filled capacity or water holding capacity. Its depends on chemical composition of the sol which means types of ions present and hence pH of the soil . Size of sol particles and their aggregation form pores in soil. Large pores take part in percolation of water in the soil but small pores hold water by capillarity. 

So, the correct answer is 'All of the above'.