Strength of Material (Part-4) (General Engineering) (SSC JE)

Total Questions: 50

21. A beam is a structural member designed primarily to take which of the following type of load [RRB S.S.E. 01.09.2015 (Shift-II) ]

Correct Answer: (b) Bending
Solution:

A beam is a structural member designed primarily to take bending load.

22. The ratio of compressive stress to volumetric strain is called as : [RRB S.S.E. 01.09.2015 (Shift-II) ]

Correct Answer: (d) Bulk modulus of elasticity
Solution:

• Bulk modulus of elasticity (k), is the ratio of compressive stress to volumetric strain

23. In S.I system, unit of stress is: [RRB S.S.E (Bilaspur/Secunderabad) 21.12.2014 ]

Correct Answer: (c) N/m²
Solution:

24. In the case of a uniformly distributed load on a simply supported beam, the bending moment diagram would be– [RRB S.S.E (Bilaspur/Secunderabad) 21.12.2014 ]

Correct Answer: (b) 2
Solution:

25. A simply supported beam is loaded as below [RRB S.S.E (Bilaspur/Secunderabad) 21.12.2014 ]


The corresponding Bending Moment Diagram is

Correct Answer: (b)
Solution:

26. What is the radius of Mohr's circle in case of bi–axial state of stress? [RRB S.S.E (Bilaspur/Secunderabad) 21.12.2014 ]

Correct Answer: (b) Half the difference of the two principal stresses
Solution:

27. If a beam is constrained to move and heated, it will develop ......... stress. [RRB JE(Patna/Muzaffarpur/Chennai/Ahmedabad/Bangalore) 14.12.2014]

Correct Answer: (d) compressive stress
Solution:

If a beam is constrained to move and heated, it will develop compressive stress.
σ = α∆TE
σ ↓ ∝ ∆ ↑

28. The maximum stress produced in a bar of tapering section is at: [RRB JE (Muzaffarpur) 14.12.2014 ]

Correct Answer: (a) smaller end
Solution:

29. What is the moment at A for a frame shown below : [RRB S.S.E (Bilaspur/Secunderabad) 21.12.2014 ]

Correct Answer: (b) PL/4
Solution:

30. Principal Plane is a plane on which the shear stress is : [BPSC AE (GEN ENGG.)-03.12.2012 / RRB JE (Muzaffarpur) 14.12.2014 ]

Correct Answer: (a) zero
Solution:

Principal Plane– The plane on which normal stress attains its maximum and minimum values are called principal planes.
The shear stress on the principal plane is zero.