Civil Engineering MCQAE Level Civil Engineering
Two simply supported beams B1 and B2 have spans l and 2l respectively. Beam B1 has a cross-section of 1 x 1 units and beam B2 has cross-section of 2 x 2 units. These beams are subjected to concentrated load W at the centre of their span. The ratio of the maximum flexural stress in these beams is:
Strength of MaterialsStrength of MaterialsMEDIUM
Choose the correct answer
A
4
B
2
C
1/2
D
1/4
Correct Answer
A. 4
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Bending stress is M/Z. The larger beam has twice the moment but eight times the section modulus, so stress in B1 is four times that in B2
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This MCQ belongs to WBPSC AE Previous Years Questions Series. Full tests include timed attempts, rank comparison and subject-wise analysis.