This set of Geotechnical Engineering Multiple Choice Questions & Answers (MCQs) focuses on “Solid Particles in Soil”.
1. The particle of coarse-grained are composed of ___________
a) Primary minerals
b) Non-clay minerals
c) Clay minerals
d) Crystalline minerals
View Answer
Explanation: Coarse-grained particle is usually made of primary minerals.
2. The fine-grained soil are composed of __________
a) Crystalline minerals and Amorphous materials
b) Primary minerals
c) All of the mentioned
d) None of the mentioned
View Answer
Explanation: Many investigations by Girm (1959) show that the fine-grained soil is composed predominantly of crystalline minerals and amorphous materials.
3. The behavior of bulky particles in coarse grained soil is governed by ___________
a) Gravitational force and Mass energy
b) Colloidal force
c) All of the mentioned
d) None of the mentioned
View Answer
Explanation: The bulky particle does not possess the property of plasticity and cohesion.
4. The crystalline minerals whose surface activity is such that, they develop cohesion and plasticity are called __________
a) Non-clay minerals
b) Clay minerals
c) Bulky particles
d) Primary minerals
View Answer
Explanation: As the surface activity of clay minerals is high they develop a property of cohesion and plasticity.
5. Clay particles behave like ___________
a) Colloids
b) Amorphous solids
c) Crystalline particles
d) Non-colloids
View Answer
Explanation: Clay minerals have high surface like colloids and are controlled by surface energy, they behave like colloids.
6. A montmorillonite platelet has a specific surface/volume equal to ____________
a) 120/μ
b) 100/ μ
c) 500/ μ
d) 1000/ μ
View Answer
Explanation: Since the platelet of montmorillionite has a volume, 5 times greater than equivolume cube (200/ μ) its volume will be equal to 1000/ μ.
7. Which of the following clay minerals are considered as colloidal?
a) Kaolinite
b) Dichite
c) Attapulgite
d) All of the mentioned
View Answer
Explanation: As entire clay particle has a greater dimension than 1μ, all of the clay minerals are considered as colloidal.
8. Clay minerals are classified in to ____________
a) 3
b) 4
c) 7
d) 6
View Answer
Explanation: Kaolinite, montmorillonite, illite, playgorskite are the types of clay minerals.
9. Chemically, the clay minerals are silicates of ____________
a) Aluminum
b) Iron
c) Magnesium
d) All of the mentioned
View Answer
Explanation: Since minerals contain alkaline and/or alkaline earth as essential component they contain alkaline mineral such as aluminium, iron, magnesium.
10. Clay is essentially made of extremely __________
a) Large particles
b) Small particles
c) Intermediate particles
d) None of the mentioned
View Answer
Explanation: Clay is generally made of small particles of either a book of sheets like units (or) bundle of tubes or fibers.
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