Strength of Materials MCQs Set-2

Page 1 of 4

1.

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

Strain

Young's modulus

None of these

Stress

2.

The thermal stress in a bar is directly proportional to

its volume

none of these

the change in temperature

its cross-sectional area

3.

Principle planes are planes having

none of these

maximum shear stress

minimum shear stress

no shear stress

4.

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

Shear

Lateral

Volumetric

Linear

5.

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

three

two

four

six

6.

The area under the stress-strain curve represents

hardness of material

breaking strength of material

energy required to cause failure

toughness of material

7.

The neutral axis in curved beams

lies at the bottom of the beam

does not coincide

coincides with the geometric axis

lies at the top of the beam

8.

The state of pure shear stress is produced by

equal tension in two directions at right angles

none of these

equal compression in two directions at right angles

tension in one direction and equal compression in perpendicular direction

9.

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

10.

Where are the steel bars in a concrete beam embedded?

In the centre

Near bottom section

Uniformly

Near top section

Page 2 of 4

11.

Strain energy is the

proof resilience per unit volume of a material

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

12.

The total strain energy stored in a body is termed as

proof resilience

modulus of resilience

impact energy

resilience

13.

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

One-fourth

Same amount

Half

14.

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

ductility

resilience

malleability

toughness

15.

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

compressive stresses

tensile stresses

no stresses

thermal stresses

16.

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

at a support

none of these

always at the mid span

under the load only

17.

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

under the load

anywhere on the beam

at the supports

at the mid span

18.

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

None of these

Proof resilience

Modulus of elasticity

Resilience

19.

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

quadratic parabola

cubic parabola

catenary

arc of a circle

20.

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

thermal stresses

Tensile stress

No stress

Bending

Page 3 of 4

21.

The shear stress at the centre of a circular shaft

maximum

minimum

zero

unpredictable

22.

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

Lead

Concrete

Wood

Cast iron

23.

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

maximum shear stress

maximum shear strain energy

maximum principal stress

maximum strain energy

24.

A beam is said to be uniform strength if

every horizontal plane

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

25.

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

less

same

unpredictable

more

26.

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

proof resilience

resilience

modulus of resilience

impact energy

27.

The hoop stresses are acting across the

circumferential section

none of these

radial section

longitudinal section

28.

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

shear strain

linear strain

volumetric strain

lateral strain

29.

Which of the following are statically indeterminate beams?

a) Fixed beam

None of these

Both (a) and (b)

b) Continuous beam

30.

The volumetric strain is the ratio of the

change in volume to the original volume

original volume to the change in volume

original thickness to the change in thickness

change in thickness to the original thickness

Page 4 of 4

31.

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

none of these

infinity

unity

zero

32.

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

Shear strain

Lateral strain

Volumetric strain

None of these

33.

Proof stress is related to

yielding

fracture

elongation

necking

34.

Stress at the boundary of kern

any value

maximum

zero

minimum

35.

In curved beams the distribution of bending stress is

Linear

Uniform

Parabolic

Hyperbolic

Strength of Materials MCQs Set-2

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