Civil Strength of Materials Multiple Choice Questions and Answers - Set 10 - ObjectiveBooks

Civil Strength of Materials Multiple Choice Questions and Answers - Set 10

Practice Test: Question Set - 10


1. A simply supported beam carrying a uniformly increasing load from either end and having the apex at the mid span is WL3/60EI
    (A) A simply supported beam carrying a uniformly increasing load from either end and having the apex at the mid span is WL3/60EI
    (B) A fixed ended beam carrying a distributed load over the span is WL3/384EI
    (C) A fixed ended beam carrying a concentrated load at the mid span is WL3/192EI
    (D) All the above

2. A flywheel on a motor goes from rest to 1000 rpm in 6 sec. The number of revolutions made is nearly equal to
    (A) 25
    (B) 50
    (C) 100
    (D) 250

3. The B.M. of a cantilever beam shown in below figure at A, is
Question No. 03
    (A) Zero
    (B) 8 Tm
    (C) 12 Tm
    (D) 20 Tm

4. A cantilever carries is uniformly distributed load W over its whole length and a force W acts at its free end upward. The net deflection of the free end will be
    (A) Zero
    (B) (5/24) (WL3/EI) upward
    (C) (5/24) (WL3/EI) downward
    (D) None of these

5. The C.G. of a plane lamina will not be at its geometrical centre in the case of a
    (A) Right angled triangle
    (B) Equilateral triangle
    (C) Square
    (D) Circle

6. Struts are load carrying members of a frame structure which are subjected to
    (A) Axial tension loads
    (B) Axial compressive loads
    (C) Torsional loads
    (D) Transverse loads

7. Strain energy of a member may be equated to
    (A) Average resistance × displacement
    (B) ½ stress × strain × area of its cross-section
    (C) ½ stress × strain × volume of the member
    (D) ½ (stress)2 × volume of the member + Young's modulus E

8. A force acting on a body may
    (A) Introduce internal stresses
    (B) Balance the other forces acting on it
    (C) Retard its motion
    (D) All of the above

9. A simply supported beam (l + 2a) with equal overhangs (a) carries a uniformly distributed load over the whole length, the B.M. changes sign if
    (A) l > 2a
    (B) l < 2a
    (C) l = 2a
    (D) l = 4a

10. The stress in the wall of a cylinder in a direction normal to its longitudinal axis, due to a force acting along the circumference, is known as
    (A) Yield stress
    (B) Longitudinal stress
    (C) Hoop stress
    (D) Circumferential stress

11. According to principle of moments
    (A) If a system of coplanar forces is in equilibrium, then their algebraic sum is zero
    (B) If a system of coplanar forces is in equilibrium, then the algebraic sum of their moments about any point in their plane is zero
    (C) The algebraic sum of the moments of any two forces about any point is equal to moment of their resultant about the same point
    (D) Positive and negative couples can be balanced

12. The ratio of strengths of solid to hollow shafts, both having outside diameter D and hollow having inside diameter D/2, in torsion, is
    (A) 1/4
    (B) 1/2
    (C) 1/16
    (D) 15/15

13. Along the neutral axis of a simply supported beam
    (A) Fibres do not undergo strain
    (B) Fibres undergo minimum strain
    (C) Fibres undergo maximum strain
    (D) None of these

14. A trolley wire weighs 1.2 kg per meter length. The ends of the wire are attached to two poles 20 meters apart. If the horizontal tension is 1500 kg find the dip in the middle of the span
    (A) 2.5 cm
    (B) 3.0 cm
    (C) 4.0 cm
    (D) 5.0 cm

15. In case of an eccentric loading on a bracket subjected to moment M, the tangential force developed in any rivet, at right angles to its radius vector r is
    (A) Mr/Ʃ r2
    (B) Ʃ r2/Mr
    (C) Mr2/Ʃ r2
    (D) √Mr/Ʃ r2

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