Strength of Materials MCQs Set-2

Page 1 of 4

1.

The area under the stress-strain curve represents

toughness of material

hardness of material

breaking strength of material

energy required to cause failure

2.

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

unpredictable

less

more

same

3.

The thermal stress in a bar is directly proportional to

its cross-sectional area

none of these

its volume

the change in temperature

4.

Principle planes are planes having

no shear stress

none of these

maximum shear stress

minimum shear stress

5.

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

Wood

Concrete

Cast iron

Lead

6.

The hoop stresses are acting across the

none of these

longitudinal section

circumferential section

radial section

7.

Neutral plane of a beam

None of these

Is one whose length remains unchanged during the deformation

Passes through the CG

Lies at bottom most fibre

8.

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

thermal stresses

Tensile stress

Bending

No stress

9.

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

no stresses

thermal stresses

tensile stresses

compressive stresses

10.

Which of the following are statically indeterminate beams?

Both (a) and (b)

None of these

a) Fixed beam

b) Continuous beam

Page 2 of 4

11.

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

maximum shear strain energy

maximum strain energy

maximum principal stress

maximum shear stress

12.

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

lateral strain

volumetric strain

linear strain

shear strain

13.

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

impact energy

resilience

proof resilience

modulus of resilience

14.

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

always at the mid span

at a support

under the load only

none of these

15.

Proof stress is related to

fracture

elongation

necking

yielding

16.

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

17.

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

anywhere on the beam

at the supports

under the load

at the mid span

18.

The total strain energy stored in a body is termed as

modulus of resilience

proof resilience

resilience

impact energy

19.

The volumetric strain is the ratio of the

change in thickness to the original thickness

original volume to the change in volume

change in volume to the original volume

original thickness to the change in thickness

20.

Stress at the boundary of kern

maximum

zero

minimum

any value

Page 3 of 4

21.

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

ductility

malleability

resilience

toughness

22.

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

Lateral strain

None of these

Volumetric strain

Shear strain

23.

The shear stress at the centre of a circular shaft

unpredictable

zero

minimum

maximum

24.

Where are the steel bars in a concrete beam embedded?

Uniformly

Near bottom section

In the centre

Near top section

25.

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

four

three

two

six

26.

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

Double

Same amount

One-fourth

Half

27.

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

Lateral

Shear

Linear

Volumetric

28.

The state of pure shear stress is produced by

equal compression in two directions at right angles

none of these

tension in one direction and equal compression in perpendicular direction

equal tension in two directions at right angles

29.

Strain energy is the

proof resilience per unit volume of a material

energy stored in a body when strained within elastic limits

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

maximum strain energy which can be stored in a body

30.

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

unity

none of these

infinity

zero

Page 4 of 4

31.

In curved beams the distribution of bending stress is

Parabolic

Hyperbolic

Uniform

Linear

32.

The neutral axis in curved beams

does not coincide

coincides with the geometric axis

lies at the top of the beam

lies at the bottom of the beam

33.

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

Stress

None of these

Strain

Young's modulus

34.

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

arc of a circle

quadratic parabola

catenary

cubic parabola

35.

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

Resilience

Proof resilience

None of these

Modulus of elasticity

Strength of Materials MCQs Set-2

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