Strength of Materials - Simple Stress

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#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


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