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UPSC Civil Service Exam Questions - Engineering

Q1:

A three-hinged symmetric parabolic arch is hinged at the springing and at the crown. The span and rise are 40 m and 10 m respectively. The left half of the arch is loaded with U.D.L. of 3 t/m. The horizontal thrust at the springings will be

A 15 t

B 20 t

C 30 t

D 40 t

ANS:C - 30 t

The correct Ans is 30t.

w*l*l/16h = 2 * 40* 40/ (16*10)= 30t.