# Void Ratio MCQ – Geotechnical Engineering

1. Void ratio of soil is the ratio of the

1. Volume of voids to volume of soil solids
2. Volume of voids to volume of water
3. Volume of soils solids to volume of voids
4. Volume of voids to total volume

2. For sand of uniform spherical particles, the ratio of void ratio in the loosest and the densest states is

1. 3.0
2. 3.5
3. 4.6
4. 2.6

3. The difference between maximum void ratio and minimum void ratio of sand is 0.30. If the relative density of this sand is 66.6% at a void ratio of 0.40, then the void ratio at its loosest state is

1. 0.6
2. 0.4
3. 0.75
4. 0.7

4. The natural voids ratio of a sand sample is 0.6 and its density index is 0.60. If its voids ratio in the loosest state is 0.9, then the void ratio in the densest state will be

1. 0.4
2. 0.2
3. 0.8
4. 0.6

5. The maximum possible voids ratio for a uniformly graded sand of perfectly spherical grains is

1. 33.33
2. 66.66
3. 50.5
4. 47.63

6. A soil has shrinkage limit of 10% and specific gravity of soil solids as 2.7. The void ratio of the soil at shrinkage limit is

1. 21.2%
2. 73%
3. 78.8%
4. 27%

7. Theoretically, the void ratio in soil can have the following values

1. less than one only
2. more than one
3. less than 0.5
4. can be less or more than one

8. For a fully saturated soil, water content is 45% and Gs = 2.67. The void ratio of the soil is

1. 1.2015
2. 2.0195
3. 1.1195
4. 1.2195

9. The difference between maximum void ratio and minimum void ratio of a sand sample is 0.25. If relative density of this sample is 60% at a void ratio of 0.40, then the void ratio of this sample at its loosest state will be

1. 0.40
2. 0.75
3. 0.70
4. 0.55

10. A cohesive soil yields a maximum dry density of 18 kN/m3 during a standard protor compaction test. If the specific gravity is 2.65. What would be its void ratio? (Adopt unit weight of water as 10 kN/m3)

1. 0.5523
2. 0.4722
3. 0.7121
4. 0.5835

11. A dry soil sample weighing 120 g has a volume of 80 ml and specific gravity 2.7. Its voids ratio is

1. 0.8
2. 0.7
3. 0.6
4. 0.5

12. A saturated soil sample has water content of 40% and specific gravity at soil particles is 2.7. The void ratio of the soil is

1. 0.4
2. 0.52
3. 1.08
4. 2.0

13. The ratio between the total volume of voids and the total volume of solids is called

1. Porosity
2. Void ratio
3. Solid fraction
4. Void fraction

14. What is defined as the ratio of volume of air voids to the total volume of soil mass and is expressed as percentage?

1. void ratio
2. porosity
3. percentage air voids
4. air content

15. A dry soil has mass specific gravity of 1.4. If the specific gravity of solids is 2.7, then the void ratio will be

1. 0.8
2. 0.4
3. 1.2
4. 1.0

16. A soil sample is having a specific gravity of 2.60 and void ratio 0.78, the moisture content in % required to fully saturate the soil at that void ratio would be

1. 30
2. 10
3. 70
4. 50

17. A soil sample is having a specific gravity of 2.5 and a void ratio of 0.5. The water content in percentage required to fully saturate the soil at the void ratio would be

1. 20
2. 5
3. 25
4. 2.5

18. Void ratio of soil mass can

1. Take any value greater than zero
2. Be zero
3. Never be greater than unity
4. Take values between 0 and 1 only

19. A dry soil has mass specific gravity of 1.35 if the specific gravity of solids is 2.7, then the void ratio will be

1. 0.5
2. 1.0
3. 1.5
4. 2.0

20. A cohesive soil yields a maximum dry density of 16 kN/m3 during a standard proctor Compaction test. What would be its void ratio if the specific gravity is 2.60

1. 0.625
2. 0.552
3. 0.5883
4. 0.712
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