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Q: Which of the following methods make use of infra-red lamp in the determination of water content of soils ?
  • A. Alcohol method
  • B. Torsional balance method
  • C. Calcium carbide method
  • D. Pycnometer method
Correct Answer: Option B - Torsion balance moisture meter method– • It is rapid and accurate laboratory method. By this method water content determine within 15 to 30 minutes. • Infrared rays are used for drying the soil sample. • It is suitable for soil which absorbed moisture from the atmosphere. • Calcium carbide or rapid moisture method is rapid but not accurate and can be used in the field and laboratory both.
B. Torsion balance moisture meter method– • It is rapid and accurate laboratory method. By this method water content determine within 15 to 30 minutes. • Infrared rays are used for drying the soil sample. • It is suitable for soil which absorbed moisture from the atmosphere. • Calcium carbide or rapid moisture method is rapid but not accurate and can be used in the field and laboratory both.

Explanations:

Torsion balance moisture meter method– • It is rapid and accurate laboratory method. By this method water content determine within 15 to 30 minutes. • Infrared rays are used for drying the soil sample. • It is suitable for soil which absorbed moisture from the atmosphere. • Calcium carbide or rapid moisture method is rapid but not accurate and can be used in the field and laboratory both.