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Mechanical Metallurgy
Mechanical Metallurgy Interview
Quiz 1
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Q.1
Hooke’s law is obeyed till _____________ in stress-strain curve.
a) propositional limit point
b) yield point
c) tensile Strength Point
d) failure point
Q.2
How many unknowns are required to establish the state of stress at any given point in 3-dimension?
a) 3
b) 6
c) 9
d) 12
Q.3
Plane stress is defined as ________
a) stress in one principal direction is 0
b) stresses in two principal directions are 0
c) strain in one principal direction is 0
d) strain in two principal directions are 0
Q.4
Which of the following statement is NOT correct?
a) The sum of the normal stresses on two perpendicular planes is an invariant quantity
b) The maximum and minimum values of normal stresses on an oblique plane at point P occurs when the shear stress is zero
c) The maximum and minimum values of the normal stress and the shear stress occurs at an angle 90 degree from each other
d) The variation of shear stress and normal stress occurs is in the form of a sine wave with a period equal to 90 degrees
Q.5
A wedge shape body is under stress with principal stresses being σx=25MPa and σy=20MPa. At a certain angle β, the components of stresses are resolved into σ1 & σwhere both σ1 & σ2 are normal to each other. If the value of σ1=18MPa, find the value of σ2?
a) 25MPa
b) 20MPa
c) 27MPa
d) 18MPa
Q.6
Find the value of shear stress acting on the body, if the principal normal stresses are 70MPa andMPa. The angle of inclination isdegrees?
a) 17.32 MPa
b) 2.88 MPa
c) 10 MPa
d) 15 MPa
Q.7
Transformation of stress along the anticlockwise direction is given by the equation:
a) 4Y
b) 5Y
c) 8Y
d) 10Y
Q.8
True stress-strain curve always lies above the engineering stress-strain curve.
a) True
b) False
Q.9
Bar with cross-sectional area of 0.05m2 is subjected to load of 2000kg, find the stress on the bar in terms of MPa?
a) 392000
b) 40000
c) 0.040
d) 0.392
0 h : 0 m : 1 s
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