Highway Engineering Questions and Answers – Mechanical Soil Stabilization

This set of Highway Engineering Multiple Choice Questions & Answers (MCQs) focuses on “Mechanical Soil Stabilization”.

1. What is the first principle of mechanical soil stabilisation?
a) Proportioning
b) Compaction
c) Consolidation
d) Shear

Explanation: The first principle of mechanical stabilised soil is proportioning and then compaction.

2. The non desirable property of soil is __________
a) Shear
b) Swelling
c) Incompressibility
d) Stability

Explanation: Swelling is not such a desirable property in soil because change in volume may cause great loss to soil.

3. The maximum dry density of the soil can be achievement by __________
a) Compaction
b) Consolidation
c) Removal of voids
d) Removal of rocks

Explanation: The best method to achieve maximum dry density is by compaction of soil, as it is the easy, best and fast method.

4. The compaction of granular material is __________
a) Very easy
b) Easy
c) Difficult
d) Very difficult

Explanation: The compaction of granular material is a very difficult task as it needs a lot of effort.

5. If the grains in the aggregate lose contact, they __________
a) Melt
b) Float
c) Freeze
d) Sieze

Explanation: When granular material is separated, then the grains in the soil mostly float and in cold region they freeze.
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6. The n in the gradation formula is called __________

Explanation: The n in gradation formula is called as the gradation index of the soil, which is used to denote the property of a particular soil.

7. The value of the maximum gradation index lies between?
a) 0.5
b) 0.3
c) 0.2
d) 0.1

Explanation: The maximum gradation index is 0.5 it depends on the coarseness of aggregate, for less coarse aggregate it may be 0.1 to 0.2.

8. The mechanical stabilised soil does not depend on __________
b) Salts
c) Compaction
d) Consolidation

Explanation: The mechanical stabilisation of soil doesn’t depend on consolidation as it is a long process.

9. The proportioning method not in use is __________
a) Rothfutch
b) Triangular
c) Lab tests
d) CBR method

Explanation: The CBR method is a method of designing of flexible pavement, the remaining are proportioning methods.

10. The percentage of chemical added in soil by weight is?
a) 1
b) 1.5
c) 0.5
d) 0.2

Explanation: The usual volume of chemical added in the soil is 0.5% of the weight of soil if it is added more then the soil may lose it’s strength.

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