______________ test is done to find out the softening point of bitumen?
Correct answer: A. Ball and ring
- A. Ball and ring
- B. Impact
- C. Flame
- D. Viscosity
Explanation
The softening point of bitumen is measured by the ring-and-ball test, in which a steel ball causes the heated bitumen disc to flow through a ring. Impact and flame tests do not measure this property.
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