Geotechnical Engineering Questions and Answers – Pipette Method

Geotechnical Engineering Objective Questions

This set of Geotechnical Engineering Multiple Choice Questions & Answers (MCQs) focuses on “Particle Size Distrubution Curve”.

1. Which of the following, cannot be used as a dispersing agent?

A) Sodium oxalate
B) Sodium polyphosphate
C) Sodium silicate
D) Sodium oxide

Answer is D)
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

Answer is A)
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

Answer is C)
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

Answer is A)
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

Answer is C)
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

Answer is C)
Explanation: The water outlet is present in the middle of the pipette analysis apparatus.

7. The recommended time interval for the drainage in pipette analysis is __________

A) 1/2,1,2,4,8,15, and 30 min
B) 2,4,6,12,20 and 30 min
C) 1,8,16,24 min
D) 24,30,34,40,46 min

Answer is A)
Explanation: The time interval for drainage of water in pipette analysis is ½, 1,2,4,8, 15 and 30 min.

8. 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

Answer is D)
Explanation: In pipette method, the method of process is simple.

9. 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

Answer is C)
Explanation: The boiling tube of 500 ml capacity is used in pipette analysis apparatus.

10. The dispersing agents in soil particle, may act as __________

A) Cementing agent
B) Separating agent
C) Soluble agent
D) Deflocculating agent

Answer is A)
Cementing agent