UPSC Civil Service Exam Questions - Engineering

Q1:

A bar AB, 4 cm is diameter and 4 m long is rigidly fixed at its ends. A torque of 12000 kg/cm is applied at a section of the bar, one metre from end A. The fixing coupled TA and TB (in kg. cm) at the supports A and B will be respectively

A 9000, 6000

B 3000, 9000

C 6000, 9000

D 9000, 3000

ANS:D - 9000, 3000

12000 x 3/4 = 9000.
12000 x 1/4 = 3000.