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# GATE 2020: Strength of Material Quiz 2

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Question 1

The stress is proportional to strain upto the proportional limit, which is the law indicating that?

Question 2

If the radius of wire stretched by a load doubled, then its Young’s modulus will

Question 3

A metal rod of initial length L

_{o}is subjected to a drawing process. The length of the rod at any instant is given by the expression, L(t)= L_{o}(1+t^{2})_{ }, where t is the time in minutes. The true strain rate (in min^{-1}) at the end of one minute is ________.Question 4

If a tensile test is done on brass item which is 20 mm in diameter having gage length of 100 mm and a tensile load T of 100 kN is applied, the gage marks distance increases by 2.345 mm. What will be the Poisson’s ratio when diameter of brass item decreases by 0.11 mm?

Question 5

The state of stress at a point ‘P’ in a two dimensional loading is such that the Mohr’s circle is a point located at 175 MPa on the positive normal stress axis.

Determine the maximum and minimum principal stresses respectively from the Mohr’s circle

Question 6

The state of stress at a point in a body is given by =100 MPa and =200 MPa. One of the principal stresses σ₁=250 MPa .The magnitudes of the other principal stress and the shearing stress are respectively

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