Time Left - 15:00 mins

GATE 2019: Machine Design Quiz 2

Attempt now to get your rank among 935 students!

Question 1

In an industrial application, FEA analysis was integrated with failure theories to design materials. So the equation derived or used for safe design is;

Question 2

Estimate the factor of safety for a hot-rolled steel has a yield strength of Syt = Syc = 100 kpsi and a true strain at fracture of εf = 0.55. Following principal stress states are
σx = 75 kpsi, σy = 75 kpsi, τxy = 0 kpsi

Question 3

Estimate the factor of safety based on maximum principal strain theory for the following Principal stress states for hot-rolled steel has given, σ1 = 200 MPa, σ2 = 150 MPa, σ3 = 50 MPa and μ= 0.3 Yield strength of material= 300 MPa   

Question 4

A mild steel shaft of 50 mm diameter is subjected to bending stress of 163 N/mm2 and a torque T. If the yield point of the steel in tension is 200 MPa, then the maximum value of this torque without causing yielding of the shaft according to the maximum principal stress theory of yielding is _____ N-m.
[ Take factor of safety, N=1]

Question 5

The stress-strain curve for mild steel is shown in the figure given below. Choose the correct option referring to both figure and table.

Question 6

A prismatic circular bar is subjected to a pull of 100KN and Avg. transverse shear load of  45 KN. Using Rankine theory, find the diameter( in mm) of the bar. Take σ= 300 MPa and FOS = 3

  • 935 attempts
  • 1 upvote
  • 11 comments
Oct 7ESE & GATE ME