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Q: Select the correct option for the given statements. Statement 1 : If CBR for 5 mm exceeds that for 2.5 mm, the CBR test should be repeated. Statement 2 : If identical results follow, the CBR corresponding to 2.5 mm penetration should be taken for design.
  • A. Statement 1 is false but statement 2 is true
  • B. Both statement 1 and statement 2 are true and statement 2 is the correct explanation of statement 1
  • C. Both statement 1 and statement 2 are true but statement 2 is not the correct explanation of statement 1
  • D. Statement 1 is true but statement 2 is false
Correct Answer: Option D - The California test meant for the evaluation of subgrade strength of road and pavement. • This is the most used method for the design of flexible pavement. • If CBR for 5mm exceeds that for 2.5mm, the test should be repeated. If identical result follows, the CBR for 5mm penetration should be taken for design.
D. The California test meant for the evaluation of subgrade strength of road and pavement. • This is the most used method for the design of flexible pavement. • If CBR for 5mm exceeds that for 2.5mm, the test should be repeated. If identical result follows, the CBR for 5mm penetration should be taken for design.

Explanations:

The California test meant for the evaluation of subgrade strength of road and pavement. • This is the most used method for the design of flexible pavement. • If CBR for 5mm exceeds that for 2.5mm, the test should be repeated. If identical result follows, the CBR for 5mm penetration should be taken for design.