search
arrow-left Previous
Next arrow-right
Q: What absorbent is used to determine water content in soil as per IS : 2720 (Part II) - 1973
  • A. Potassium carbonate
  • B. Potassium acetate
  • C. Calcium carbide
  • D. Potassium citrate
Correct Answer: Option C - Calcium carbide method– • Determine water content in soil by the calcium carbide method as per IS : 2720 (Part II) - 1973. • It is a method for rapid determination of water content from the gas pressure developed by the reaction of calcium carbide with the free water of the soil. • From the calibrated scale of the pressure gauge the percentage of water on total mass of wet soil is obtained and the same is converted to water content on dry mass of soil.
C. Calcium carbide method– • Determine water content in soil by the calcium carbide method as per IS : 2720 (Part II) - 1973. • It is a method for rapid determination of water content from the gas pressure developed by the reaction of calcium carbide with the free water of the soil. • From the calibrated scale of the pressure gauge the percentage of water on total mass of wet soil is obtained and the same is converted to water content on dry mass of soil.

Explanations:

Calcium carbide method– • Determine water content in soil by the calcium carbide method as per IS : 2720 (Part II) - 1973. • It is a method for rapid determination of water content from the gas pressure developed by the reaction of calcium carbide with the free water of the soil. • From the calibrated scale of the pressure gauge the percentage of water on total mass of wet soil is obtained and the same is converted to water content on dry mass of soil.