Simple Stresses and Strains II- Civil Engineering Quiz

Simple Stresses and Strains – Civil Engineering Quiz

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As soon as the external forces causing deformation in a perfectly elastic body are withdrawn, the elastic deformation disappears

Only partially

Completely after an initial period of rest

Completely and instantaneously

Completely over a prolonged period of time

Consider the following factors :
Large number of loading cycles 2) Large variation in stress 3) Large stress concentrations
Those associated with fatigue failure include

1 and 2

1 and 3

2 and 3

1,2 and 3

As compared to mild steel ,high carbon steel has less

Ultimate strength

Hardness

Ductility

Hardness and ductility

The shear modulus of most materials with respect to the module of elasticity is

More than half

Less than half

Equal to half

Unrelated

For engineering materials, Poisson’s ration lies between

0 and 1

-1 and +1

-1/2 and +1/2

0 and 1/2

The number of elastic constants for an isotropic elastic, material following Hooke’s law is:

The modulus of elasticity of high tensile steel is

Smaller than that of mild steel

Equal to that of mild steel

Larger than that of mild steel

Equal to that of aluminum

In an experiment, it is found that the bulk modulus of a material is equal to its shear modulus. The Poisson’s ratio is

0.125

0.250

0.375

0.500

A cast iron block is 5cm2 cross-section carries an axial tension load of 10t. The maximum axial stress in the block is given by

2000 kg/cm2

1000 kg/cm2

500 kg/cm2

250 kg/cm2

10.

For mild steel, the lower yield point is more significant than the upper yield point because

Strain is more than at this point

It is less than upper yield point

It is less affected by the shape of the section

None of the above

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