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Q: For bituminous materials, vacuum capillary viscometers are used for the determination of :
  • A. Absolute viscosity
  • B. Industrial viscosity
  • C. Both the above
  • D. None of the above
Correct Answer: Option A - For bituminous materials, a vacuum capillary viscometer is used to measure ultimate viscosity. In this test, the bitumen material is filled in a vessel with a hole in the bottom and placed on the reservoir at a temperature of 15.50C. The more time it takes for the bitumen to drip from the hole, the greater its viscosity.
A. For bituminous materials, a vacuum capillary viscometer is used to measure ultimate viscosity. In this test, the bitumen material is filled in a vessel with a hole in the bottom and placed on the reservoir at a temperature of 15.50C. The more time it takes for the bitumen to drip from the hole, the greater its viscosity.

Explanations:

For bituminous materials, a vacuum capillary viscometer is used to measure ultimate viscosity. In this test, the bitumen material is filled in a vessel with a hole in the bottom and placed on the reservoir at a temperature of 15.50C. The more time it takes for the bitumen to drip from the hole, the greater its viscosity.