UPSC Civil Service Exam Questions

Q1:

A mild steel flat subjected to a tensile force of 84 tonnes is connected to a gusset plate using rivets. If the forces required to shear a single rivet, to crush the rivet and to tear the plate per pitch length are 5000 kg, 8000 kg and 6000 kg respectively, then the number of rivets required is

A 12

B 14

C 16

D 17

ANS:D - 17

Strength of joints = Minimum of forces required to shear a single rivet, to crush the rivet and to tear the plate per pitch length.

= 5000 kg.

Number of rivets required to transmit pull of 84 tonnes = 84000/5000 = 16.8 say 17.



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