The Benkelman beam test is used to assess:
Choose the correct answer
Compressive strength of subgrade
Structural adequacy of existing flexible pavement by measuring rebound deflection under a standard axle
Bitumen content of extracted sample
Stability of bituminous mix
Correct Answer
B. Structural adequacy of existing flexible pavement by measuring rebound deflection under a standard axle
AI Detailed Explanation & IS Code Reference
Unlock the reasoning, formula path and code-linked notes inside your student dashboard.
Benkelman beam (IRC 81): A standard loaded truck (80 kN rear axle) is positioned over the beam tip. As the truck moves forward, the beam tip rebounds. Rebound deflection > 1.25 mm (rural NH) indicates weak pavement requiring overlay/strengthening.
ScoreCardAI links this solution with subject, topic and difficulty signals so your scorecard can identify weak areas after a full mock test.
Practice more Civil Engineering questions
This MCQ belongs to AE Level Premium Test Series. Full tests include timed attempts, rank comparison and subject-wise analysis.