Civil Engineering MCQAE Level Civil Engineering
Solid circular shaft diameter 60 mm, torque 4 kN·m. Max shear stress ≈
Strength of MaterialsTorsional Shear StressMEDIUM
Choose the correct answer
A
47.2 N/mm²
B
56.6 N/mm²
C
94.3 N/mm²
D
113.2 N/mm²
Correct Answer
C. 94.3 N/mm²
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J=πd⁴/32=π×60⁴/32=1,272,345 mm⁴; τmax=Tr/J=4×10⁶×30/1,272,345=94.3 N/mm²
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