Strength of Materials - Simple Stress
#1
Keeping the depth d constant, the width of a cantilever of length I of uniform strength loaded with a uniformly distributed load varies from zero at the free end and [SSC JE 23-01-2018 FN]
1) (2w/σd2) * I2 at the fixed end
2) (3w/ σd2) * I2 at the fixed end
3) (3w/ σd) * I2 at the fixed end
4) (5w/ σd) * I2 at the fixed end
Correct Options: C
# 2
A material which obeys Hooke's law is subjected to direct stress σ0. At its elastic limit, which of the following statements is true? [SSC JE 23-01-2018 FN]
1) The strain is equal to σ0/E
2) Maximum shear stress = σ0/2
3) Strain energy = (σ02/2E) x volume
4) All option are correct
Correct Options : D
# 3
Plastic response of a material to compressive force is known as (APPSC AEE MAINS 2016)
A.Elasticity
B.Ductility
C.Plasticity
D.Malleability
Correct Options: A
# 4
The phenomenon of the decreased resistance of a material to repeated stresses is called (APPSC AEE MAINS 2016)
A.Fatigue
B.Creep
C.Freezing
D.Melting
Correct Options: A
# 5
Creep of material is
A. Continued deformation with time-under sustained loading
B. The disappearance of deformation on the removal of load
C. Not being ductile
D. To become brittle
# 6
A material with large deformation at failure is termed
A.Brittle
B.Elastic
C.Ductile
D.Elasto-Plastic
# 7
If a steel tire is heated and struck on a rigid wheel, after cooling the tire will be subjected to (APPSC AEE MAINS 2016)
A.Bending
B.Torsion
C.Hoop stress
D.Compression
Correct Options: A
# 8
The diameter of a tapering rod varies from ‘D’ to ‘D/2’ in length of ‘L’ m.If it is subjected to an axial tension of ‘P’ the change in length is
A.4PL/(π ED2)
B.8PL/(π ED2)
C.2PL/(π ED2)
D. None of the given answers
# 9
The value of Poisson’s ratio for which bulk modulus of material will be equal to its Young’s modulus
A.0.33
B.0.15
C.0.45
D.0.25
# 10
The principle of superposition is valid only for
A. Any elastic materials
B. All metals
C. Linear elastic materials
D. Homogeneous materials
