Top 1000+ Solved Strength of Materials MCQ Questions Answer
Q. Modulus of resilience is the proof resilience per unit volume of a material.
a. Correct
b. Incorrect
Q. A column is said to be a short column, when
a. its length is very small
b. its cross-sectional area is small
c. the ratio of its length to the least radius of gyration is less than 80.
d. the ratio of its length to the least radius of gyration is more than 80.
Q. The Rankine's theory for active earth pressure is based on the assumption that
a. the retained material is homogeneous and cohesionless
b. the frictional resistance between the retaining wall and the retained material is neglected
c. the failure of the retained material takes place along a plane called rupture plane
d. all of the above
Q. The vertical column has two moments of inertia (i.e Ixx and Iyy). The column will tend to buckle in the direction of the
a. axis of load
b. perpendicular to the axis of load
c. maximum moment of inertia
d. minimum moment of inertia
Q. The modulus of elasticity for mild steel is approximately equal to
a. 10 kN/mm2
b. 80 kN/mm2
c. 100 kN/mm2
d. 210 kN/mm2
Q. Two beams, one of circular cross-section and the other of square cross-section, have equal areas of cross-sections. When these beams are subjected to bending.
a. both beams are equally economical
b. square beam is more economical
c. circular beam is more economical
d. none of these
Q. A twisting couple in a shaft induces in the shaft
a. Shear stress
b. Bending moment
c. Deflection
d. All of the above
e. None of the above
Q. An unknown weight falls through 1 cm on a collar rigidly attached to the lower end of a vertical bar 3 m long and 6 m2 in section. If the maximum instantaneous extension is 2 mm the value of stress would be
a. 1500 kg/cm2
b. 500 kg/cm2
c. 1000 kg/cm2
d. 1333 kg/cm2
e. 667 kg/cm2
Q. The neutral axis of a transverse section of a beam passes through the centre of gravity of the section and is
a. At right angles to the plane in which the beam bends
b. In the same plane in which beam bends
c. In the vertical plane
d. In the horizontal plane
e. None of the above
Q. The local strain energy at a point in a material when shear stress is 80 MN/m2 and G = 27 GN/m2 will be nearly
a. 58.5 kJ/m3
b. 118.5 kJ/m3
c. 438.5 kJ/m3
d. 2348 kJ/m2
e. None of the above