Top 1000+ Solved Strength of Materials MCQ Questions Answer
Q. A beam supporting a uniformly distributed load over its entire length L is pinned at one end and passes over a roller support at a distance x from the other end. The value of x such that the greatest bending moment in the beam is as small as possible, will be
a. 0.111 L
b. 0.2 L
c. 0.125 L
d. 0.33 L
e. 0.293 L
Q. Hoop stress is
a. Circumferential tensile stress
b. Compressive stress
c. Radial stress
d. Longitudinal stress
e. None of the above
Q. Two beams carrying uniformly distributed load have same depth but beams A has width 2nd as compared to width w for beam B. The ratio of elastic strength of beam A compred to that of B will be
a. 4
b. 1
c. The beam is rectangular in section
d. 2
Q. If two unequal rolling loads of unequal weight roll along a beam, the maximum bending moment will occur
a. Under heavy load when the centre of the load is at the centre of beam
b. Under heavy load when the centre of the lighy load is at the centre of the beam.
c. Under heavy load
d. Under light load when centre of the beam bisects the distance between the resultant of the loads and light wheel
e. Under heavy load when the centre of the beam oisects the distance between the resultant of the loads and ligh wheel
Q. The loss of strength in compression with simultaneous gain in srength in tension due to overloading is known as
a. Banschinger effect
b. Visco-elasticity
c. Hysteresis
d. Creep
e. Inelasticity
Q. The kern of a circular section of diameter D is a concentric circular area of diameter
a. 2/3 D
b. 3/4 D
c. D/8
d. D/4
e. 3/5 D
Q. Tensile stress is
a. Stress measured by the ratio of the increase or decrease in length of the unloaded piece
b. Stress due to any force
c. Stress caused by varying load
d. Stress measured by the ratio of the increase or decrease in length of the unloaded piece under tensile force
e. Stress due to change in length under a load
Q. The longitudinal strain for a specimen is 0.01 and it is found to undergo 1 mm change in its thickness. The thickness of the specimen will be
a. 10 mm
b. 100 mm
c. 1000 mm
d. 400 mm
e. None of the above
Q. Identify the incorrect statement about true stress-strain method
a. This method can be used for compression tests as well
b. True stress is load per unit area (actual) and sunilarly true strain is determined under actual conditions
c. It is more sensitive to changes in mechanical conditions
d. It is more sensitive to changes in metallurgical conditions
e. There is no such phenomenon like true stress or true strain
Q. Perry-Robertson formula for columns takes into account
a. initial curvature of column
b. initial eccutricity of column
c. both (A) and (B) above
d. None of the above
e. None of the above
Q. A simply supported beam of span L which carries over its full span a load varying uniformly from zero at either ends to W kg/m at mid-span, will have zero shear force at
a. Ends
b. Mid-spam
c. Both at ends as well as mid-span
d. At L/4 from either end
e. None of the above
Q. According to Von Mises theory, the elastic failure occurs
a. When the shear strain energy is least
b. When shear strain equals 50% of the value of tensile strain at elastic limit in a simple tension test
c. When the shear strain energy per unit volume in the stressed material equals shear strain energy per unit volume at the elastic limit in a simple tension test
d. None of the above
e. None of the above