Civil Engineering MCQAE Level Civil Engineering
A rectangular beam section 300 mm wide and 500 mm deep is subjected to a bending moment of 60 kN-m. The extreme fibre bending stress is nearly
Structural AnalysisGeneralMEDIUM
Choose the correct answer
A
9.6 N/mm^2
B
4.8 N/mm^2
C
2.4 N/mm^2
D
7.2 N/mm^2
Correct Answer
B. 4.8 N/mm^2
AI Detailed Explanation & IS Code Reference
Unlock the reasoning, formula path and code-linked notes inside your student dashboard.
Z = bd^2/6 = 12500000 mm^3 and stress = M/Z = 60x10^6/12500000 = 4.8 N/mm^2.
ScoreCardAI links this solution with subject, topic and difficulty signals so your scorecard can identify weak areas after a full mock test.
Concept shortcut
IS/IRC reference
Common trap
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.