Civil Engineering MCQJE Level Civil Engineering
For a thin-walled closed tube of mean perimeter s and area enclosed A_m, the shear flow q due to torque T is:
Strength of MaterialsStrength of MaterialsHARD
Choose the correct answer
A
q = T/s
B
q = T/(2A_m) — Bredt''s formula
C
q = 2T/A_m
D
q = T/(A_m × s)
Correct Answer
B. q = T/(2A_m) — Bredt''s formula
AI Detailed Explanation & IS Code Reference
Unlock the reasoning, formula path and code-linked notes inside your student dashboard.
Bredt''s formula: q = T/(2A_m). Shear flow q = τ×t (t = wall thickness). Shear stress τ = T/(2A_m × t). For thin-walled closed sections (multiple cells), Bredt''s theory replaces the solid section Prandtl torsion theory. Maximum stress in thinnest wall.
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 JE Level Premium Test Series. Full tests include timed attempts, rank comparison and subject-wise analysis.