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