Strength of Materials MCQ
SET-2
21. In the torsion equation
the term J/R is called
- A. shear modulus
- B. section modulus
- C. polar modulus
- D. none of these
Answer : C
22. Strain resetters are used to
- A. measure shear strain
- B. measure linear strain
- C. measure volumetric strain
- D. relieve strain
Answer: B
23. The torque transmitted by a solid shaft of diameter (D) is (where τ = Maximum allowable shear stress)
Answer : B
24. When a rectangular beam is loaded transversely, the maximum compressive stress is developed on the
-
A. top layer
-
B. bottom layer
-
C. neutral axis
-
D. every cross-section
Answer: B
25. For a beam, as shown in the below figure, when the load W is applied in the centre of the beam, the maximum deflection is
Answer : A
26. The point of contraflexure is a point where
- A. shear force changes sign
- B. bending moment changes sign
- C. shear force is maximum
- D. bending moment is maximum
Answer: B
27. The simply supported beam ‘A’ of length l carries a central point load W. Another beam ‘B’ is loaded with a uniformly distributed load such that the total load on the beam is W. The ratio of maximum deflections between beams A and B is
- A. 5/8
- B. 8/5
- C. 5/4
- D. 4/5
Answer: B
28. The maximum stress produced in a bar of tapering section is at
- A. smaller end
- B. larger end
- C. middle
- D. anywhere
Answer: A
29. The energy stored in a body when strained within elastic limit is known as
- A. resilience
- B. proof resilience
- C. strain energy
- D. impact energy
Answer: C
30. In compression test, the fracture in cast iron specimen would occur along
- A. the axis of load
- B. an oblique plane
- C. at right angles to the axis of specimen
- D. would not occur
Answer: B
31. The bending stress in a beam is __________ section modulus.
- A. directly proportional to
- B. inversely proportional to
Answer: B
32. When shear force at a point is zero, then bending moment is __________ at that point.
- A. zero
- B. minimum
- C. maximum
- D. infinity
Answer: C
33. The maximum bending moment for the beam shown in the below figure, lies at a distance of __________ from the end B.
Answer: D
34. When a bar is cooled to – 5° C, it will develop
- A. no stress
- B. shear stress
- C. tensile stress
- D. compressive stress
Answer: C
35. The limit of eccentricity is based upon no tension condition.
- A. True
- B. False
Answer: A
36. In order to know whether a column is long or short, we must know its slenderness ratio.
- A. True
- B. False
Answer: A
37. A composite shaft consisting of two stepped portions having spring constants k1 and k2 is held between two rigid supports at the ends. Its equivalent spring constant is
Answer: D
38. Resilience is the
- A. energy stored in a body when strained within elastic limits
- B. energy stored in a body when strained upto the breaking of the specimen
- C. maximum strain energy which can be stored in a body
- D. none of the above
Answer: D
39. If the depth is kept constant for a beam of uniform strength, then its width will vary in proportional to (where M = Bending moment)
- A. M
- B. M
- C. M2
- D. M3
Answer: A
40. A concentrated load is one which
- A. acts at a point on a beam
- B. spreads non-uniformly over the whole length of a beam
- C. spreads uniformly over the whole length of a beam
- D. varies uniformly over the whole length of a beam
Answer: A
Please someone solve it
Enumerate variuos scenarios/cases of non-uniform stress distribution in solids. Explain with the
help of examples why simple stress definition cannot be used in such cases.