Civil Engineering MCQAE Level Civil Engineering
Shaft 300 rpm, 60 kW, allowable shear stress 60 N/mm². Minimum diameter approximately:
Strength of MaterialsShaft Design TorsionHARD
Choose the correct answer
A
38 mm
B
54 mm
C
76 mm
D
108 mm
Correct Answer
B. 54 mm
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T=60,000×60/(2π×300)=1909 N·m=1,909,000 N·mm; d³=16T/(πτ)=16×1,909,000/(π×60)=162,000; d≈54.5 mm
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