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In the pycnometer method of determining water content, the following observations are taken.
Weight of pycnometer = 450g
Weight of pycnometer + wet soil = 950g
Weight of pycnometer + soil + water = 1950g
Weight of pycnometer + water = 1550g
Specific gravity of soil soilds = 2.67
What is the water content of the sample in %?
  • a)
    88.18
  • b)
    78.18
  • c)
    73.18
  • d)
    75
Correct answer is option 'B'. Can you explain this answer?
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To determine the water content using the pycnometer method, we need to follow these steps:

1. Calculate the weight of the dry soil:
Weight of pycnometer = 450g
Weight of pycnometer + wet soil = 950g
Weight of dry soil = Weight of pycnometer + wet soil - Weight of pycnometer
= 950g - 450g
= 500g

2. Calculate the weight of water in the soil:
Weight of pycnometer + soil + water = 1950g
Weight of pycnometer = 450g
Weight of water = Weight of pycnometer + soil + water - Weight of pycnometer - Weight of soil
= 1950g - 450g - 500g
= 1000g

3. Calculate the weight of water in the pycnometer:
Weight of pycnometer + water = 1550g
Weight of pycnometer = 450g
Weight of water = Weight of pycnometer + water - Weight of pycnometer
= 1550g - 450g
= 1100g

4. Calculate the water content:
Water content = (Weight of water in soil / Weight of dry soil) * 100
= (1000g / 500g) * 100
= 200%

However, the water content cannot exceed 100% as it represents the ratio of water to dry soil. Therefore, the maximum water content is 100%.

Given that the specific gravity of soil solids is 2.67, we can adjust the water content calculation using the specific gravity factor.

5. Calculate the adjusted weight of water in soil:
Adjusted weight of water = Weight of water * Specific gravity of soil solids
= 1000g * 2.67
= 2670g

6. Calculate the adjusted water content:
Adjusted water content = (Adjusted weight of water / Weight of dry soil) * 100
= (2670g / 500g) * 100
= 534%

Again, the adjusted water content cannot exceed 100%. Therefore, we need to calculate the excess water and subtract it from the adjusted water content.

7. Calculate the excess water:
Excess water = Adjusted water content - 100%
= 534% - 100%
= 434%

8. Calculate the final water content:
Final water content = Adjusted water content - Excess water
= 534% - 434%
= 100%

Therefore, the water content of the sample is 100%.

Since none of the given options match the correct answer, the question might have a mistake or the calculations might be incorrect.
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In the pycnometer method of determining water content, the following observations are taken.Weight of pycnometer = 450gWeight of pycnometer + wet soil = 950gWeight of pycnometer + soil + water = 1950gWeight of pycnometer + water = 1550gSpecific gravity of soil soilds = 2.67What is the water content of the sample in %?a)88.18b)78.18c)73.18d)75Correct answer is option 'B'. Can you explain this answer?
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In the pycnometer method of determining water content, the following observations are taken.Weight of pycnometer = 450gWeight of pycnometer + wet soil = 950gWeight of pycnometer + soil + water = 1950gWeight of pycnometer + water = 1550gSpecific gravity of soil soilds = 2.67What is the water content of the sample in %?a)88.18b)78.18c)73.18d)75Correct answer is option 'B'. Can you explain this answer? for Civil Engineering (CE) 2024 is part of Civil Engineering (CE) preparation. The Question and answers have been prepared according to the Civil Engineering (CE) exam syllabus. Information about In the pycnometer method of determining water content, the following observations are taken.Weight of pycnometer = 450gWeight of pycnometer + wet soil = 950gWeight of pycnometer + soil + water = 1950gWeight of pycnometer + water = 1550gSpecific gravity of soil soilds = 2.67What is the water content of the sample in %?a)88.18b)78.18c)73.18d)75Correct answer is option 'B'. Can you explain this answer? covers all topics & solutions for Civil Engineering (CE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for In the pycnometer method of determining water content, the following observations are taken.Weight of pycnometer = 450gWeight of pycnometer + wet soil = 950gWeight of pycnometer + soil + water = 1950gWeight of pycnometer + water = 1550gSpecific gravity of soil soilds = 2.67What is the water content of the sample in %?a)88.18b)78.18c)73.18d)75Correct answer is option 'B'. Can you explain this answer?.
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