271. A tensile test is performed on a round bar. After fracture, it has been found that the diameter remains approximately same at fracture. The material under test was
mild steel
cast iron
glass
copper
✅ The correct answer is option B.
Strength of Materials MCQs
272. The maximum deflection of a cantilever beam of length l with a point load W at the free end is
✅ The correct answer is option A.
273. Two shafts ‘A’ and ‘B’ have the same material. The shaft ‘A’ is solid of diameter 100 mm. The shaft ‘B’ is hollow with outer diameter 100 mm and inner diameter 50 mm. The torque transmitted by shaft ‘B’ is __________ as that of shaft ‘A’.
1-Jun
1-Aug
1-Apr
15/16
✅ The correct answer is option D.
274. The strength of a riveted joint is equal to the
pull required to tear off the plate per pitch length (Pt)
pull required to shear off the rivet per pitch length (Ps)
pull required to crush the rivet per pitch length (Pc)
minimum value of Pt, P
✅ The correct answer is option D.
276. In the below figure, __________ represents glass.
curve A
curve B
curve C
curve D
✅ The correct answer is option C.
278. In calculating the strength of a riveted joint in tearing, shearing and crushing, the
actual diameter of rivet is used
actual diameter of hole drilled for rivet is used
mean diameter of hole drilled and rivet is used
smaller of the rivet d
✅ The correct answer is option B.
279. Shear strength of the welded joint for double parallel fillet is (where τ = Allowable shear stress for weld metal)
0.5 s.l.τ
s.l.τ
2 s.l.τ
2.s.l.τ
✅ The correct answer is option C.
280. When a circular bar tapering uniformly from diameter d1, at one end to diameter d2 at the other end, is subjected to an increase in temperature (t), then the thermal stress induced is (where α = Coefficient of linear expansion, and E = Modulus of elasticity for the bar material)
✅ The correct answer is option A.