Rajasthan Technical Education Second Year Paper 2016 Strength of Materials
If the radius of wire strectched by a load is doubled, then its Young”s modulus will be
(a) halved
(b) become four times
(c) becomes one-fourth
(d) remains unaffected
In a tensile test on mild steel, the breaking stress as compared to ultimate stress is
(a) more
(b) less
(c) same
(d) may have any value
If a material expands freely on heating, it will develop
(a) tensile stress
(b) compressive stress
(c) thermal stress
(d) no stress
Four specimens of M.S. have thier length and diameter as 1, d; 2l, 2d; 3l, 3d; 4l, 4d respectively. Which of these will have largest extension when the same tensile force is applied to all of them ?
(a) First
(b) Second
(c) Third
(d) Fourth
Maximum shearing stress planes are at ______ angle from the principal planes
(a) 45 degree
(b) 90 degree
(c) 22.5 degree
(d) None of these
Principal plane is one which carries
(a) no shear stress
(b) no normal stress
(c) maximum resultant stress
(d) no resultant stress
The maximum strain energy that can be stored in a body is known as
(a) Resilience
(b) Proof resilience
(c) Impact energy
(d) Modulus of resilience
The strain energy stored in a body due to suddenly applied load compared to gradually applied load is
(a) same
(b) half
(c) double
(d) four times
The bending moment diagram for a cantilever beam carrying uniformly distributed load will be
(a) rectangular
(b) triangular
(c) parabola
(d) cubic
The bending moment on a section is maximum where shearing force
(a) is maximum
(b) is minimum
(c) is zero
(d) is equal
The point of contra-flexure is a point where
(a) Shear force is zero
(b) Shear force changes sign
(c) Bending moment changes sign
(d) bending moment maximum
Moment of intertia of an area is always least with respect to
(a) bottom most axis
(b) central axis
(c) centoidal axis
(d) top most axis
Strength of a rectangular section beam is proportional to the square of its
(a) length
(b) width
(c) depth
(d) None of these
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