Strength of Materials Questions and Solutions - Set 19 - ObjectiveBooks

Practice Test: Question Set - 19

1. If the depth of a simply supported beam carrying an isolated load at its centre, is doubled, the deflection of the beam at the centre will be changed by a factor of
(A) 2
(B) 1/2
(C) 8
(D) 1/8

2. The minimum number of rivets for the connection of a gusset plate, is
(A) 1
(B) 2
(C) 3
(D) 4

3. The cross sections of the beams of equal length are a circle and a square whose permissible bending stress is same under same maximum bending. The ratio of their flexural weights is,
(A) 1.118
(B) 1.338
(C) 1.228
(D) 1.108

4. Pick up the correct statement from the following:
(A) A ductile material has large plastic zone
(B) A brittle material has no plastic zone
(C) A rigid material has no plastic zone
(D) All the above

5. The section modulus of a rectangular light beam 25 metres long is 12.500 cm3. The beam is simply supported at its ends and carries a longitudinal axial tensile load of 10 tonnes in addition to a point load of 4 tonnes at the centre. The maximum stress in the bottom most fibre at the mid span section, is
(A) 13.33 kg/cm2 tensile
(B) 13.33 kg/cm2 compressive
(C) 26.67 kg/cm2 tensile
(D) 26.67 kg/cm2 compressive

6. Stress in members of statically determinate simple frames, can be determined by
(A) Method of joints
(B) Method of sections
(C) Graphical solution
(D) All the above

7. The point of contraflexure occurs in
(A) Cantilever beams only
(B) Continuous beams only
(C) Over hanging beams only
(D) All types of beams

8. A rectangular beam 20 cm wide is subjected to a maximum shearing force of 10,000 kg, the corresponding maximum shearing stress being 30 kg/cm2. The depth of the beam is
(A) 15 cm
(B) 20 cm
(C) 25 cm
(D) 30 cm

9. If a member is subjected to a tensile force P, having its normal cross-section A, the resulting shear stress in an oblique plane inclined at an angle θ to its transverse plane, is
(A) (P/A) sin2θ
(B) (P/2A) sin 2θ
(C) (P/2A) cos 2θ
(D) (P/A) cos2θ

10. If a shaft is simultaneously subjected to a toque T and a bending moment M, the ratio of maximum bending stress and maximum shearing stress is
(A) M/T
(B) T/M
(C) 2M/T
(D) 2T/M

11. The ratio of the effective length of a column and minimum radius of gyration of its cross-sectional area, is known
(A) Buckling factor
(B) Slenderness ratio
(C) Crippling factor
(D) None of these

12. The region of the cross-section of a column in which compressive load may be applied without producing any tensile stress, is known as the core of the cross-section. In circular columns the radius of the core, is
(A) One-half of the radius
(B) One-third of the radius
(C) One-quarter of the radius
(D) One-fifth of the radius

13. If the width of a simply supported beam carrying an isolated load at its centre is doubled, the deflection of the beam at the centre is changed by
(A) 2 times
(B) 4 times
(C) 8 times
(D) 1/2 times

14. A cylinder is said to be thin if the ratio of its thickness and diameter, is less than
(A) 1/25
(B) 1/20
(C) 1/15
(D) 1/10

15. As the elastic limit reaches, tensile strain
(A) Increases more rapidly
(B) Decreases more rapidly
(C) Increases in proportion to the stress
(D) Decreases in proportion to the stress

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