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You are provided with a sample of soil. You have to determine the water content of the given sample. Which of the following method cannot be help in the given scenario?
- a)Calcium carbide method
- b)Pycnometer method
- c)Pipette method
- d)Oven dry method
Correct answer is option 'C'. Can you explain this answer?
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Most Upvoted Answer
You are provided with a sample of soil. You have to determine the wate...
Among the given options, the calcium carbide, oven dry method, pycnometer method are used to determine the water content of soil but pipette method is used to particle analysis of fine grained soils
Note:
Calcium carbide method: (Rapid Moisture Meter)
Note:
Calcium carbide method: (Rapid Moisture Meter)
- The calcium carbide method is the quickest and reasonably accurate method of determination of water content of soil using a portable moisture content kit. It is usually requires 5 to 7 minutes for determining the water content.
- The method is based on the principle that when the water in the soil reacts with calcium carbide, acetylene gas is produced and the pressure exerted by the acetylene gas on a diaphragm gives a measure of the water content.
- The water content obtained from the calcium carbide method is based on the initial weight of wet soil. It should be converted to water content based on the dry weight of soil.
Pycnometer method:
- It is quick method gives result in 10 – 20 minutes.
- This method is used only when specific gravity of soil solids is known.
- It is used only for cohesionless soils because removal of entrapped gasses is very difficult in case of cohesive soils.
Oven drying method:
- Oven dry method is the most accurate and simplest method for water content determination.
- In this method complete drying of soil sample occurs and water content in the sample is calculated accurately by a maintained temperature in the oven (105°C to 110°C) for 24 hours.
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You are provided with a sample of soil. You have to determine the wate...
Explanation:
The water content of soil refers to the amount of water present in the soil sample. There are several methods available to determine the water content of soil, and each method has its own advantages and limitations.
Let's discuss each method and why it can or cannot be used in the given scenario:
1. Calcium carbide method:
- This method is commonly used to determine the water content of soil.
- It involves mixing a soil sample with calcium carbide, which reacts with water to produce acetylene gas.
- The amount of gas produced is proportional to the water content of the soil, and it can be measured using a pressure gauge.
- Therefore, the calcium carbide method can be used to determine the water content of the given soil sample.
2. Pycnometer method:
- The pycnometer method is another commonly used method to determine the water content of soil.
- It involves weighing a known volume of soil and then drying it in an oven to remove the water.
- The difference in weight before and after drying is used to calculate the water content.
- Therefore, the pycnometer method can be used to determine the water content of the given soil sample.
3. Pipette method:
- The pipette method is used to determine the particle size distribution of soil, not the water content.
- It involves using a pipette to extract a soil-water suspension, and then analyzing the sedimentation of particles to determine the particle size distribution.
- Therefore, the pipette method cannot be used to determine the water content of the given soil sample.
4. Oven dry method:
- The oven dry method is commonly used to determine the water content of soil.
- It involves weighing a known amount of soil and then drying it in an oven at a specific temperature for a specified period of time.
- The difference in weight before and after drying is used to calculate the water content.
- Therefore, the oven dry method can be used to determine the water content of the given soil sample.
Conclusion:
Based on the explanation above, the method that cannot be used in the given scenario to determine the water content of the soil sample is the pipette method (option C).
The water content of soil refers to the amount of water present in the soil sample. There are several methods available to determine the water content of soil, and each method has its own advantages and limitations.
Let's discuss each method and why it can or cannot be used in the given scenario:
1. Calcium carbide method:
- This method is commonly used to determine the water content of soil.
- It involves mixing a soil sample with calcium carbide, which reacts with water to produce acetylene gas.
- The amount of gas produced is proportional to the water content of the soil, and it can be measured using a pressure gauge.
- Therefore, the calcium carbide method can be used to determine the water content of the given soil sample.
2. Pycnometer method:
- The pycnometer method is another commonly used method to determine the water content of soil.
- It involves weighing a known volume of soil and then drying it in an oven to remove the water.
- The difference in weight before and after drying is used to calculate the water content.
- Therefore, the pycnometer method can be used to determine the water content of the given soil sample.
3. Pipette method:
- The pipette method is used to determine the particle size distribution of soil, not the water content.
- It involves using a pipette to extract a soil-water suspension, and then analyzing the sedimentation of particles to determine the particle size distribution.
- Therefore, the pipette method cannot be used to determine the water content of the given soil sample.
4. Oven dry method:
- The oven dry method is commonly used to determine the water content of soil.
- It involves weighing a known amount of soil and then drying it in an oven at a specific temperature for a specified period of time.
- The difference in weight before and after drying is used to calculate the water content.
- Therefore, the oven dry method can be used to determine the water content of the given soil sample.
Conclusion:
Based on the explanation above, the method that cannot be used in the given scenario to determine the water content of the soil sample is the pipette method (option C).
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You are provided with a sample of soil. You have to determine the water content of the given sample. Which of the following method cannot be help in the given scenario?a)Calcium carbide methodb)Pycnometer methodc)Pipette methodd)Oven dry methodCorrect answer is option 'C'. Can you explain this answer?
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