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Q: In the softening point test of the bitumen with the help of ring and ball apparatus, what is the diametre (cm) of the steel ball?
  • A. 0.35
  • B. 0.65
  • C. 0.95
  • D. 1.25
Correct Answer: Option C - The softening point is the temperature at which the substance attains a particular degree of softening under specified condition of test. • Softening point of various bitumen grades generally lies in between 35⁰ C to 70⁰C. The softening point of bitumen is usually determined by ring and ball test. • The diameter of the steel ball is 0.95 cm.
C. The softening point is the temperature at which the substance attains a particular degree of softening under specified condition of test. • Softening point of various bitumen grades generally lies in between 35⁰ C to 70⁰C. The softening point of bitumen is usually determined by ring and ball test. • The diameter of the steel ball is 0.95 cm.

Explanations:

The softening point is the temperature at which the substance attains a particular degree of softening under specified condition of test. • Softening point of various bitumen grades generally lies in between 35⁰ C to 70⁰C. The softening point of bitumen is usually determined by ring and ball test. • The diameter of the steel ball is 0.95 cm.