UPSC Civil Service Exam Questions

Q1: The effective depth of a singly reinforced rectangular beam is 30 cm. The section is over-rein-forced and the neutral axis is 12 cm below the top. If the maximum stress attained by concrete is 50 kg/cm2 and the modular ratio is 18, then the stress developed in steel would be

A 1800 kg/cm2

B 1600 kg/cm2

C 1350 kg/cm2

D 1300 kg/cm2

ANS:D - 1300 kg/cm2

σ s= m σ c.
m modular ratio.
s stress in steel.
c stress in concrete.



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