CE2252 Strength Of Materials B.E Question Bank : drnnce.ac.in

Name of the College : Dr. Navalar Nedunchezhiyan College of engineering
University : Anna University Chennai
Subject Code/Name : CE2252-Strength Of Materials
Dept : Civil Engineering
Degree : B.E
Sem: IV
Website : drnnce.ac.in
Document Type : Question Bank

Download Model Question Paper : https://www.pdfquestion.in/uploads/drnnce.ac.in/3203-CE2252-SOM%20QB.pdf

DRNNCE Strength Of Materials Question Paper

UNIT-1 :
ENERGY PRINCIPLES :
PART-A : (1 MARKS)
1. The unit of stress in S.I units is
a) n/mm2
b)kN/mm2
c)N/m2
d)any one of these

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2. The deformation per unit length is called
a) Tensile stress
b) compressive stress
c) shear stress
d) strain

3. The unit of strain is
a)N-mm
b)N/mm
c)mm
d)no unit

4) Strain is equal to
a) l/dl
b)dl/l
c)l.dl
d)l+dl

5) Hook law holds well up to
a)yield point
b)elastic limit
c)plastic limit
d)breaking point

6) Whenever material is loaded within elastic limit, stress is………….strain.
a) Equal to
b) directly proportional to
c) inversely proportional to.

7) The ratio of linear stress to the linear strain is called.
a) Modulus of rigidity
b) modulus of elasticity
c) bulk modulus
d) Poisson?s ratio

8) The unit of modulus of elasticity is same as those of
a) Stress, strain and pressure
b) stress, force and modulus of rigidity
c) Strain, force and pressure
d) stress, pressure and of rigidity

9) When a change in length takes place, the strain is known as
a) Linear strain
b) lateral strain
c) volumetric strain
d) shear strain

10) The modulus of elasticity for mild steel is approximately equal to
a) 10 kN/mm2
b) 80 kN/mm2
c) 100 kN/mm2
d) 210 Kn/mm2

11.young’smodulus may be defined as the ratio of
a)linear stress to lateral strain
b) lateral strain to linear stain
c) linear stress to linear strain
d)shear stress to shear strain

12. Modulus of rigidity may be defined as the ratio of
a) linear stress to lateral strain
b) lateral strain to linear stain
c) linear stress to linear strain
d)shear stress to shear strain

13. The unit of young’s modulus is same as that of stress
a) equal to
b) less than
c) more then

14. When a bars of different materials and same size are subjected to the same tensile force. If the bars have unit elongation in ratio of 2:5 then the ratio of modulus of elasticity of the two materials will be
a) 2:5
b) 5:2
c) 4:3
d) 3:4

15. Strainrosetters are used to Ultimate tensile
a) measure shear strain
b) measure linear strain
c) Measure volumetric strain
d) relieve strain

16. The ultimate tensile stress for mild steel is……..the ultimate compressive stress
a) equal to
b) less than
c) more then

17. The maximum stress produced in a bar of tapering section is at
a) Smaller end
b) larger end
c) middle
d) any where

18. Modular ratio of the two materials is the ratio of
a) Linear stress to linear strain
b) shear stress to shear strain
c) Their modulus of elasticity
d) their modulus of rigidities

19. The shear modulus of most materials with respect to the modulus of elasticity is
a) Equal to half
b) less than half
c) more than half
d) none of these

20. a steel bar of 5 mm is heated from 15°c to 40°c and it is free to expand. The bar will induce
a) No stress
b) shear stress
c) tensile stress
d) compressive stress

PART-B : (2 MARKS)
1. Define stress.
When an external force acts on a body, it undergoes deformation. At the same time the body resists deformation. The magnitude of the resisting force is numerically equal to the applied force. This internal resisting force per unit area is called stress.
Stress = Force/Area
When a body is subjected to an external force, there is some change of dimension in the body. Numerically the strain is equal to the ratio of change in length to the original length of the body.= P/A unit is N/mm^2
2. Define strain
_ Strain = Change in length/Original length
e = _L/L
3. State Hooke’s law.
It states that when a material is loaded, within its elastic limit, the stress is directly proportional to the strain.
Stress _ Strain
_ _ e
_ = Ee
E = _/e unit is N/mm^2
Where,
E – Young?s modulus
_ – Stress
e – Strain
4. Define shear stress and shear strain.
The two equal and opposite force act tangentially on any cross sectional plane of the body tending to slide one part of the body over the other part. The stress induced is called shear stress and the corresponding strain is known as shear strain.
5. Define Poisson’s ratio.
When a body is stressed, within its elastic limit, the ratio of lateral strain to the longitudinal strain is constant for a given material. Poisson? ratio (µ or 1/m) = Lateral strain /Longitudinal strain
6. State the relationship between Young’s Modulus and Modulus of Rigidity.
E = 2G (1+1/m)
Where,
E – Young?s Modulus
K – Bulk Modulus
1/m – Poisson?s ratio
7. Define strain energy
Whenever a body is strained, some amount of energy is absorbed in the body. The energy which is absorbed in the body due to straining effect is known as strain energy.
8. Give the relationship between Bulk Modulus and Young’s Modulus.
E = 3K (1-2/m)
Where,
E – Young?s Modulus
K – Bulk Modulus
1/m – Poisson?s ratio
9. What is compound bar?
A composite bar composed of two or more different materials joined together such that system is elongated or compressed in a single unit.
10. Define- elastic limit
Some external force is acting on the body, the body tends to deformation. If the force is released from the body its regain to the original position. This is called elastic limit