Top 1000+ Solved Strength of Materials MCQ Questions Answer
Q. Strain is
a. The change in metals
b. The change in shape and direction in metal
c. The result of load application on a body
d. The change of form produced in a piece by the action of load
e. None of the above
Q. The shape of steel chimneys commonly used is
a. Square
b. Circular
c. Octagonal
d. Elliptical
e. None of the above
Q. The loss of strength in compression due to overloading is known as
a. Relaxation
b. Creep
c. Hysteresis
d. Bauschinger effect
e. Resilience
Q. When a rectangular beam is loaded longitudinally, shear stress develops on
a. Vertical planes only
b. Top fibre
c. Middle fibre
d. Every fibre
e. Bottom fibre
Q. A circular section of steel 20 mm diameter is subjected to an axial force of 100 kg. The components of force normal and tangential to a plane inclined to the axis of bar will be
a. 54 kg
b. 70.7 kg
c. 100 kg
d. 141 kg
e. 80 kg
Q. In the case of biaxial state of normal stresses, the normal stress on 45? plane is equal to
a. the sum of the normal stresses
b. the difference of the normal stresses
c. half the sum of the normal stress
d. half the difference of normal stresses
e. None of the above
Q. A copper rod 15 mm diameter 0.8 m long is heated through 50?C. The expansion of the rod is prevented by gripping it at both ends. When the grips do not yield, the stress in rod is 115 N/mm2 and forces applied at the grips are 20 kN. In case one of the grip yields by 0.5 mm
a. the rod will be under tension
b. the force at grips will be increase
c. the compressive stress in the rod will increase
d. the compressive stress in the rod will reduce
e. None of the above
Q. Approximate horse power that can be transmitted by a shaft 60 mm dimeter at 180 rpm with permissible shear stress of 850 kg/cm2 would be
a. 30 - 35
b. 35 - 50
c. 60 - 85
d. 85 - 95
e. 50 - 60
Q. The efficiency of a riveted joint is defined as the ratio of actual strength of the joint to that of solid plate. In this strength of the joint is considered in
a. Tension
b. Compression (bearing)
c. Shear
d. Least of (A), (B) and (C) above
e. None of the above
Q. A rectangular beam 200 mm deep by 100 mm wide-subjected to maximum bending moment of 500 kNm. The maximum stress in the beam will be
a. 250 N/mm2
b. 500 N/mm2
c. 750 N/mm2
d. 1500 N/mm2
e. None of the above
Q. For a given stress the ratio of moment of resistance of a square beam with its side horizontal compared to when the diagonal is horizontal is
a. 1.5
b. ?2
c. 1.2
d. 2
e. depends on external load and moment of inertia
Q. In laminated spring the strips are provided in different lengths for
a. Space consideration of the utility stage
b. Reducing the weight
c. Equal distribution of stress
d. Material economy
e. Improved sppearance