Strength of Materials MCQs Set-2

Page 1 of 4

1.

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

tensile stresses

thermal stresses

no stresses

compressive stresses

2.

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

One-fourth

Double

Same amount

Half

3.

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

maximum shear strain energy

maximum strain energy

maximum shear stress

maximum principal stress

4.

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

less

more

same

unpredictable

5.

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

catenary

arc of a circle

quadratic parabola

cubic parabola

6.

The neutral axis in curved beams

coincides with the geometric axis

lies at the bottom of the beam

lies at the top of the beam

does not coincide

7.

The volumetric strain is the ratio of the

change in thickness to the original thickness

original thickness to the change in thickness

original volume to the change in volume

change in volume to the original volume

8.

A beam is said to be uniform strength if

the deflection is the same throughout the beam

the bending moment is the same throughout the beam

the shear stress is the same throughout the beam

every horizontal plane

9.

In curved beams the distribution of bending stress is

Linear

Parabolic

Hyperbolic

Uniform

10.

Which of the following are statically indeterminate beams?

Both (a) and (b)

a) Fixed beam

b) Continuous beam

None of these

Page 2 of 4

11.

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

Volumetric strain

None of these

Shear strain

Lateral strain

12.

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

Concrete

Wood

Cast iron

Lead

13.

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

thermal stresses

No stress

Bending

Tensile stress

14.

The hoop stresses are acting across the

longitudinal section

radial section

none of these

circumferential section

15.

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

two

six

four

three

16.

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

lateral strain

linear strain

shear strain

volumetric strain

17.

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

Proof resilience

None of these

Modulus of elasticity

Resilience

18.

The thermal stress in a bar is directly proportional to

none of these

its volume

the change in temperature

its cross-sectional area

19.

Strain energy is the

maximum strain energy which can be stored in a body

energy stored in a body when strained within elastic limits

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

proof resilience per unit volume of a material

20.

Where are the steel bars in a concrete beam embedded?

Near top section

Uniformly

Near bottom section

In the centre

Page 3 of 4

21.

Proof stress is related to

necking

fracture

elongation

yielding

22.

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

Shear

Linear

Volumetric

Lateral

23.

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

Strain

None of these

Young's modulus

Stress

24.

The state of pure shear stress is produced by

tension in one direction and equal compression in perpendicular direction

equal compression in two directions at right angles

none of these

equal tension in two directions at right angles

25.

Neutral plane of a beam

None of these

Lies at bottom most fibre

Is one whose length remains unchanged during the deformation

Passes through the CG

26.

The area under the stress-strain curve represents

breaking strength of material

energy required to cause failure

toughness of material

hardness of material

27.

Stress at the boundary of kern

any value

maximum

zero

minimum

28.

The total strain energy stored in a body is termed as

resilience

impact energy

modulus of resilience

proof resilience

29.

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

impact energy

modulus of resilience

proof resilience

resilience

30.

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

toughness

ductility

resilience

malleability

Page 4 of 4

31.

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

32.

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

at the mid span

at the supports

anywhere on the beam

under the load

33.

Principle planes are planes having

no shear stress

none of these

maximum shear stress

minimum shear stress

34.

The shear stress at the centre of a circular shaft

zero

minimum

unpredictable

maximum

35.

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

infinity

none of these

unity

zero

Strength of Materials MCQs Set-2

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