Strength of Material (Part-3) (General Engineering) (SSC JE)

Total Questions: 50

11. If a steel rod 5 cm long elongates by 5 mm, the stress developed is [BPSC AE (GEN. ENGG.)-2006 ]

Correct Answer: (d) none of these
Solution:

12. The bending moment diagram over the length of the beam carrying uniformly distributed load is always : [BPSC AE (GEN. ENGG.)-2006 ]

Correct Answer: (b) parabolic
Solution:

13. In a fixed beam the points of contraflexure [BPSC AE (GEN. ENGG.)-2006 ]

Correct Answer: (d) all the above
Solution:

14. A simply supported beam of span L carried a UDL of w kN/m. The maximum bending moment M is [RRB JE (Bilaspur/Kolkata/Mumbai/Guwahati)-14.12.2014 / BPSC AE (GEN ENGG.)-03.12.2012 / BPSC AE (GEN. ENGG.)-2006 ]

Correct Answer: (c) WL/8
Solution:

15. The property by which a body return to its original shape after removal of the force, is called [BPSC AE (GEN. ENGG.)-2001 / BPSC AE (GEN. ENGG.)-2006 ]

Correct Answer: (b) elasticity
Solution:

The property by which a body return to its original shape after removal of the force, is called elasticity.

Plasticity–The characteristics of material by which it undergoes inelastic strain beyond those at the elastic limit. The plasticity is particular useful in the operation of pressing and forging.

Malleability–It is property of material which allow material to be extended in all direction without rupture like sheets. A malleable material posses high degree of plasticity but not necessary great strength.

16. Simple bending equation [BPSC AE (GEN. ENGG.)-2006 ]

Correct Answer: (c) M/I = E/R = F/Y
Solution:

Simple bending equation–
M/I = E/R = F/Y
• Simple bending theory is applicable only if the crosssectional area is symmetric.
• In deriving simple bending theory, it is assumed that Young's modulus is same in tension and compression.

17. The tensile force required to cause an elongation of 0.045 mm in a steel rod of 1000 mm length and 12 mm diameter is [BPSC AE (GEN. ENGG.)-2006 ]

(Assume E = 2.1 × 10⁶ kg/cm²)

Correct Answer: (b) 106 kg
Solution:

18. The beam is loaded as cantilever. If the load at the end is increased, the failure will occur [BPSC AE (GEN ENGG.)-03.12.2012 ]

Correct Answer: (b) at the support
Solution:

19. Unit of strain is [BPSC AE (GEN ENGG.)-03.12.2012 ]

Correct Answer: (b) dimensionless
Solution:

Strain–The change in length δ and the original length, L (Deformation)

20. Solve the following equation [BPSC AE (GEN ENGG.)-03.12.2012 ]

Correct Answer: (b)
Solution: