1. Which of the following, cannot be used as a dispersing agent?
a) Sodium oxalate
b) Sodium polyphosphate
c) Sodium silicate
d) Sodium oxide
Discussion
Explanation: Sodium oxide cannot be used as a dispersing agent in preparing soil suspension.
2. The process of removal of organic matter and calcium compounds in the dispersion method is __________
a) Pretreatment
b) Sedimentation
c) Evaporation
d) None of the mentioned
Discussion
Explanation: Pretreatment is the process of removal of organic matter and calcium compounds in the dispersion method.
3. Which of the following are used as a standard sedimentation method in a laboratory?
a) Sedimentation analysis method
b) Hydrometer method
c) Pipette method
d) Sand replacement method
Discussion
Explanation: Pipette method is used as a standard sedimentation method than hydrometer in a laboratory.
4. The dispersing agent which are added to soil in the pipette method may also be referred to as __________
a) Deflocculating agent
b) Calgon
c) Mechanical agent
d) None of the mentioned
Discussion
Explanation: To have a proper dispersion of the soil, Deflocculating agent is used as a dispersing agent.
5. In the pipette method of sedimentation analysis, the soil is treated with __________ to remove organic matter in it.
a) Hydrochloric acid
b) Sodium oxalate
c) Hydrogen peroxide
d) Sodium silicate
Discussion
Explanation: The soil is treated with hydrogen peroxide to remove organic matter.
6. In pipette analysis apparatus, the water outlet is present at __________
a) Top
b) Bottom
c) Middle
d) Slightly above bottom
Discussion
Explanation: The water outlet is present in the middle of the pipette analysis apparatus.
7. Which of the following is not a disadvantage, in using the pipette method for sedimentation analysis?
a) The apparatus is very simple
b) Requires very accurate weight
c) It requires more time
d) The method of process is simple
Discussion
Explanation: In pipette method, the method of process is simple.
8. The volume (or) capacity of boiling tube taken in pipette method is about __________
a) 750 ml
b) 1000 ml
c) 500 ml
d) 800 ml
Discussion
Explanation: The boiling tube of 500 ml capacity is used in pipette analysis apparatus.
9. The dispersing agents in soil particle, may act as __________
a) Cementing agent
b) Separating agent
c) Soluble agent
d) Deflocculating agent
Discussion
Explanation: The dispersing agents that are mixed with soil particle act as a cementing soluble to withhold the particles present.
10. The Sodium hexametaphosphate used in soil suspension may be also called __________
a) Deflocculating agent
b) Calgon
c) Aggregate
d) None of the mentioned
Discussion
Explanation: Sodium hexametaphosphate, which is used in preparing soil suspension is also called as calgon.