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Q: Shelby tube is one of the most widely used devices for.
  • A. collecting undisturbed
  • B. measuring effective stress and plotting Mohr envelope
  • C. drilling rocks
  • D. wash borings and drilling cobbles
Correct Answer: Option A - Undisturbed sample–Shelby tube is one of the most widely used devices for collecting undisturbed soil samples. • Shelby tube samplers are thin-walled hollow steel tubes, which are driven into the ground to extract a relatively undisturbed soil sample for use in laboratory tests to determine density, permeability, compressibility and strength. Disturbed soil sample–Natural conditions of a sample such as its structure, texture, density, natural water contents or stress conditions are disturbed then this type sample is called as disturbed soil sample.
A. Undisturbed sample–Shelby tube is one of the most widely used devices for collecting undisturbed soil samples. • Shelby tube samplers are thin-walled hollow steel tubes, which are driven into the ground to extract a relatively undisturbed soil sample for use in laboratory tests to determine density, permeability, compressibility and strength. Disturbed soil sample–Natural conditions of a sample such as its structure, texture, density, natural water contents or stress conditions are disturbed then this type sample is called as disturbed soil sample.

Explanations:

Undisturbed sample–Shelby tube is one of the most widely used devices for collecting undisturbed soil samples. • Shelby tube samplers are thin-walled hollow steel tubes, which are driven into the ground to extract a relatively undisturbed soil sample for use in laboratory tests to determine density, permeability, compressibility and strength. Disturbed soil sample–Natural conditions of a sample such as its structure, texture, density, natural water contents or stress conditions are disturbed then this type sample is called as disturbed soil sample.