Strength of Materials Objective Questions with Answers - Set 04

Practice Test: Question Set - 04


1. A masonry dam may fail due to
    (A) Tension in the masonry of the dam and its base
    (B) Overturning of the dam
    (C) Crushing of masonry at the base of the dam
    (D) Any one of the above

2. Impact strength of a material is an index of its
    (A) Toughness
    (B) Tensile strength
    (C) Capability of being cold worked
    (D) Hardness

3. In order to prevent crushing of masonry at the base of the dam, the maximum stress should be __________ the permissible stress of the soil.
    (A) Equal to
    (B) Less than
    (C) More than
    (D) None of these

4. Volumetric strain for a rectangular specimen of length ‘l’, breadth ‘b’ and thickness ‘t’ subjected to a pull of ‘P’ is given by
    (A) e (1 - 2m)
    (B) e (1 - 2/m)
    (C) e (m - 2)
    (D) e (2/m - 1)

5. When a body is subjected to two equal and opposite pushes, as a result of which the body tends to reduce its length, then
    (A) The stress and strain induced is compressive
    (B) The stress and strain induced is tensile
    (C) Both A and B is correct
    (D) None of these

6. A thin cylindrical shell of diameter (d) and thickness (t) is subjected to an internal pressure (p). The ratio of longitudinal strain to volumetric strain is
    (A) (m - 1)/ (2m - 1)
    (B) (2m - 1)/ (m - 1)
    (C) (m - 2)/ (3m - 4)
    (D) (m - 2)/ (5m - 4)

7. Modulus of rigidity is defined as the ratio of
    (A) Longitudinal stress to longitudinal strain
    (B) Volumetric stress to volumetric strain
    (C) Lateral stress to Lateral strain
    (D) Shear stress to shear strain

8. In the torsion equation T/J = τ/r = Gθ/ L, the term J/R is called
    (A) Shear modulus
    (B) Section modulus
    (C) Polar modulus
    (D) None of these

9. Strain re-setters are used to
    (A) Measure shear strain
    (B) Measure linear strain
    (C) Measure volumetric strain
    (D) Relieve strain

10. 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

11. In a uniform bar, supported at one end in position, the maximum stress under self weight of bar shall occur at the
    (A) Middle of bar
    (B) Supported end
    (C) Bottom end
    (D) None of these

12. When both ends of a column are fixed, the effective length is
    (A) Its own length
    (B) Twice its length
    (C) Half its length
    (D) 1/2 × its length

13. 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
    (A) K₁ K₂
    (B) (K₁ + K₂)/ 2
    (C) (K₁ + K₂)/ K₁ K₂
    (D) K₁ K₂/ (K₁ + K₂)

14. Slenderness of a column is zero when
    (A) Ends are firmly fixed
    (B) Column is supported on all sides throughout the length
    (C) Length is equal to radius of gyration
    (D) Length is twice the radius of gyration

15. Resilience is the
    (A) Energy stored in a body when strained within elastic limits
    (B) Energy stored in a body when strained up to the breaking of the specimen maximum strain
    (C) Energy which can be stored in a body
    (D) None of the above

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