Top 1000+ Solved Strength of Materials MCQ Questions Answer
Q. Two beams of equal cross-sectional area are subjected to equal bending moment. If one beam has square cross-section and the other has circular section, then
a. The suitability of section will depend on the nature of loading
b. In shear, square section beam will be stronger
c. Both beams will be equally strong
d. Square section beam will be economical
e. Circular section beam will be economical
Q. The slenderness ratio of vertical comumn of square cross-section of 2.5 cm sides and 600 cm length is
a. 500
b. 200
c. 100
d. 900
e. 1000
Q. The torsional resisting moment of the following section is being considered with identical characteristic parameter. Which section will have maximum torsional resisting moment
a. Hollow circular
b. Circular
c. Triangular
d. Square
e. Hexagonal
Q. The force required to punch a 25 mm hole in a mild steel pipe 10 mm thich, when ultimate shear stress of the plate is 500 N/mm2 will be nearly
a. 78 kN
b. 98 kN
c. 393 kN
d. 158 kN
e. None of the above
Q. During the tensile test on a glass rod, the nature of stress section curve is
a. Vertical line
b. Sudden break
c. Same as that for mild steel
d. Horizontal line
e. Straight line
Q. The plastic moment of a beam can be 50 percent more than the maximum elastic moment in case the cross-section of the beam is
a. Circular
b. Rectangular
c. Elliptical
d. I-section
e. Semi-circular
Q. If unit loads rest upon a beam at two points A and B, the deflection at A due to unit load at B, equals the deflection at B due to the unit load at A. This is known as
a. Rankine's theorem
b. Mohr's hypothesis
c. Castigliano's theorem
d. Maxwell's theorem
e. None of the above
Q. If the rivet value is 2000 N and the force in the member is 2000 N, the number of rivets required for the connection of the member to a gusset plate is
a. 1
b. 2
c. 4
d. 8
e. None of the above
Q. A material which recovers fully after unloading but not instantaneously is known as
a. Elastic
b. Partially elastic
c. Anelastic
d. Inelastic
e. Plastic
Q. If Young's modulus of elasticity is determined for mild steel in tension and compression, the two values will have a ratio (Et/Er) of
a. Rhombus
b. 0.5
c. 1.2
d. 1
e. 2
Q. Clad metals are
a. Non-ferrous materials
b. Two or more dissimilar materials riveted together
c. Two or more dissimilar materials joined together by welding
d. Two or more dissimilar materials jointed together under very high hydraulic pressure
e. None of the above
Q. Two bars of sifferent materials are of the same size and are subjected to same tensile forces. If the bars have unit elongation in the ratio of 7 : 3, then the ratio of modulii of elasticity of the two materials is
a. 8 ; 3
b. 3 ; 8
c. 64 ; 9
d. 9 ; 64
e. None of the above
Q. A square steel bar 20 mm on a side is subjected to an axial compressive load of 8 kN. The normal stress acting on plane 30? to the line action of the axial load will be
a. 0.5 N/mm2
b. 2.5 N/mm2
c. 50 N/mm2
d. 550 N/mm2
e. None of the above
Q. Hooke's Law is valid within the limits of proportionality. The limit of proportionality depends on
a. type of loading
b. area of cross-section
c. type of material
d. hardness of material
e. None of the above
Q. In case of thin walled cylinders the ratio of hoop stress to radial stress is
a. 2
c. 4
d. None of the above