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Strength of Materials Quiz 3
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Question 1
The deformation of a bar under its own weight as compared to that when subjected to a direct axial load equal to its own weight will be
Question 2
A tapering bar, having diameters d1 and d2 at end sections, and a bar of uniform cross section d have the same length and are subjected to the same axial pull. Both the bars will have the same extension if d is equal to __________.
Question 3
In a 2D state of stress at a point,
σx = 100 MPa
σy = 40 MPa
τxy = 40 MPa
what will be minor principal stress developed?
Question 4
Shear force and bending moment diagrams for a beam ABCD are shown in figure. It can be concluded that
Question 5
What is the expression for the strain energy due to bending of a cantilever beam (length L, modulus of elasticity E and moment of inertia I?)
Question 6
A metal rod is rigidity fixed at its both ends. The temperature of the rod is increased by 100 °C. If the coefficient of linear expansion and elastic modulus of the metal rod 10×10-6/ °C and 200Gpa respectively, then what is the stress produced in the rod?
Question 7
For the two shafts connected in parallel
Question 8
A water main of 1 m diameter contains water at a pressure head of 100 meters. The permissible tensile stress in the material of the water main is 25 MPa. What is the minimum thickness of the water main? (Take g = 10 m/s2)
Question 9
A beam uniformly loaded is simply supported at ends. The deflection at the centre of the beam is 7mm. If both of the simple supports are replaced by fixed supports the new deflection of the resultant beam is
Question 10
What is the expression for the crippling load for a column of length l with one end fixed and other end free?
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