Strength of Materials MCQs Set-2

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1.

Strain energy is the

maximum strain energy which can be stored in a body

proof resilience per unit volume of a material

energy stored in a body when strained upto the breaking of a specimen

energy stored in a body when strained within elastic limits

2.

If a material expands freely due to heating, it will develop

No stress

Bending

thermal stresses

Tensile stress

3.

Strain in a direction at right angle to the direction of applied force is known as

Lateral strain

Shear strain

None of these

Volumetric strain

4.

In curved beams the distribution of bending stress is

Linear

Parabolic

Hyperbolic

Uniform

5.

The ultimate tensile stress of mild steel compared to ultimate compressive stress is

less

same

more

unpredictable

6.

The neutral axis in curved beams

lies at the top of the beam

coincides with the geometric axis

does not coincide

lies at the bottom of the beam

7.

___________strain is the deformation of the bar per unit length in the direction of the force.

Shear

Volumetric

Linear

Lateral

8.

The strain energy stored by the body within elastic limit when loaded externally is called as

Resilience

None of these

Modulus of elasticity

Proof resilience

9.

The maximum bending moment due to a moving load on a fixed ended beam occurs

at a support

under the load only

always at the mid span

none of these

10.

For a linearly elastic, isotropic and homogeneous material the number of elastic constants require to relate stress and strain is

six

four

two

three

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11.

The volumetric strain is the ratio of the

original thickness to the change in thickness

original volume to the change in volume

change in thickness to the original thickness

change in volume to the original volume

12.

Young's modulus of elasticity for a perfectly rigid body is

none of these

zero

unity

infinity

13.

The strain energy stored in a body due to external loading, within the elastic limit is known as

resilience

malleability

ductility

toughness

14.

Stress at the boundary of kern

minimum

zero

any value

maximum

15.

If a material expands freely due to heating, it will develop

compressive stresses

thermal stresses

no stresses

tensile stresses

16.

The maximum bending moment due to a moving load on a simply supported beam, occurs

at the supports

under the load

anywhere on the beam

at the mid span

17.

Which of the following are statically indeterminate beams?

None of these

b) Continuous beam

Both (a) and (b)

a) Fixed beam

18.

The maximum strain energy that can be stored in a body is known as

impact energy

proof resilience

modulus of resilience

resilience

19.

The deformation of the bar per unit length in the direction of the force is known as

linear strain

volumetric strain

lateral strain

shear strain

20.

A prismatic bar when subjected to pure bending assumes the shape of

quadratic parabola

cubic parabola

catenary

arc of a circle

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21.

The hoop stresses are acting across the

circumferential section

longitudinal section

radial section

none of these

22.

Proof stress is related to

fracture

elongation

necking

yielding

23.

The area under the stress-strain curve represents

hardness of material

energy required to cause failure

toughness of material

breaking strength of material

24.

Young's modulus of a wire is defined as the stress which will increase the length of wire compared to its original length by

Same amount

One-fourth

Double

Half

25.

The thermal stress in a bar is directly proportional to

its volume

its cross-sectional area

the change in temperature

none of these

26.

The state of pure shear stress is produced by

equal compression in two directions at right angles

none of these

equal tension in two directions at right angles

tension in one direction and equal compression in perpendicular direction

27.

The unit of Young's modulus is same as that of

Stress

Young's modulus

Strain

None of these

28.

Neutral plane of a beam

Passes through the CG

Is one whose length remains unchanged during the deformation

None of these

Lies at bottom most fibre

29.

A beam is said to be uniform strength if

the bending moment is the same throughout the beam

every horizontal plane

the shear stress is the same throughout the beam

the deflection is the same throughout the beam

30.

Where are the steel bars in a concrete beam embedded?

Near top section

In the centre

Uniformly

Near bottom section

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31.

When a beam is loaded the horizontal or longitudinal shear should be accounted for materials like

Wood

Lead

Cast iron

Concrete

32.

The total strain energy stored in a body is termed as

proof resilience

impact energy

resilience

modulus of resilience

33.

The shear stress at the centre of a circular shaft

zero

unpredictable

maximum

minimum

34.

According to Rankin's hypothesis, the criterion of failure of a brittle material is

maximum principal stress

maximum shear stress

maximum shear strain energy

maximum strain energy

35.

Principle planes are planes having

maximum shear stress

no shear stress

minimum shear stress

none of these

Strength of Materials MCQs Set-2

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