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Mechanical Properties A221

Total questions: 120

Worksheet time: 1hrs 5mins

Name
Class
Date
1.

Which letter represents the plastic region?

a)

C

b)

D

c)

E

d)

F

e)

G

2.

Which letter represents the failure point?

a)

C

b)

D

c)

E

d)

F

e)

G

3.

Which letter represents the yield strength?

a)

A

b)

B

c)

C

d)

D

e)

E

4.

Which letter represents Ultimate Tensile Strength?

a)

A

b)

B

c)

C

d)

D

e)

E

5.

Which has a higher density, a gram of steel or a kilogram of steel?

a)

A gram

b)

A kilogram

c)

They are the same

6.

A material’s ability to be flattened into a sheet (malleability) or drawn into a wire (ductility) is known as

a)

force

b)

stress

c)

workability

d)

brittleness

7.

Which of the following is a characteristic property?

a)

color of flame

b)

density

c)

boiling point

d)

All are characteristic properties

8.

Pulling on a rubber band is an example of what kind of force?

a)

tension

b)

torsion

c)

compression

d)

shear

9.

The property when a material deforms/distorts from stress and retains its new shape:

a)

plasticity

b)

elasticity

c)

polymerization

d)

thermoset

10.

The two main divisions of solid structures are amorphous and:

a)

elastic

b)

morphous

c)

crystalline

d)

hard

11.
Aluminium is a light material.
a)
true
b)
false
12.
It is cheaper than silver and is a very good electrical conductor.
a)
Rubber
b)
Silver
c)
Copper
d)
Plastic
13.
It is the steel which does not rust.
a)
Fibre
b)
Stainless
c)
Plasticine
d)
Clay
14.

A bouncy ball is thrown to the floor. It deforms, then returns to its original shape. it is...

a)

elasticity

b)

plasticity

c)

hardness

d)

tensile strangth

15.

Name the following mechanical property

a)

Shear

b)

compressional

c)

torsional

d)

tensional

16.

Toughness is the ability to absorb energy and:

a)

twist

b)

resist fracture or breaking

c)

bend

d)

dent

17.

Name the following mechanical property

a)

shear

b)

torsional

c)

compressional

d)

tensional

18.

Elasticity:

a)

Is the materials ability to be bent without fracture.

b)

Is the materials ability to be stretched without fracture when the load is removed.

c)

Is the materials ability to be deformed and return to its original shape when the load is removed.

d)

Is the materials ability to resist a load before deforming.

19.

Conductivity is:

a)

The measure to which a material will allow stress to pass through its atoms.

b)

The measure to which a material will resist stress to pass through its atoms.

c)

The measure to which a material will allow heat to pass through its atoms.

d)

The measure to which a material will resist heat to pass through its atoms.

20.

Torsional strength:

a)

Is the materials ability to resit a tensile load without fracture.

b)

Is the materials ability to resit twisting without fracture.

c)

Is the materials ability to resit compression without fracture.

d)

Is the materials ability to resit a shear load without fracture.

21.

Tensile strength:

a)

Is the materials ability to resit a tensile load without fracture.

b)

Is the materials ability to resit a shear load without fracture.

c)

Is the materials ability to resit compression without fracture.

d)

The materials ability to resist a torsional load without fracture.

22.

Toughness can be defined as:

a)

The ability for the material to be drawn into a wire without fracture.

b)

The ability of a material to be shaped without fracture.

c)

The ability to withstand scratching and indentation.

d)

The ability to withstand impact and shock loading without fracture.

23.

Hardenability is:

a)

The depth to which a material can be successfully hardened upon quenching.

b)

The ability of a material to resist scratching and indentation.

c)

The resistance to shaping a material due to its elastic properties.

d)

Where the material cannot be welded to another material.

24.

Malleability is where:

a)

The material can be joined without cracking.

b)

A material can be cut into shape.

c)

A material can be moulded or pressed into shape without fracture.

d)

The material can be drawn into a wire through a series of dies.

25.

Hardness can be defined as:

a)

The ability for a metal to be drawn into a wire.

b)

The ability of a material to resist scratching and indentation.

c)

The ability to withstand impact.

d)

The ability to not be moulded into a shape.

26.
At room temperature, most metals are
a)
liquid
b)
solid
c)
gas
d)
an alloy
27.

What is the lustre of a material?

a)

The refractive index of the material.

b)

The ability of a material to form thin sheets.

c)

How the light interacts with the surface of the material.

d)

The absorption properties of a material.

28.

What property is this?

a)

lustrous

b)

tough

c)

malleable

29.

What material is this?

a)

porcelain

b)

sand

c)

rock

30.

What property is this?

a)

ductile

b)

brittle

c)

insulation

31.

What material is this?

a)

rock

b)

asphalt

c)

sand

32.

What property is this?

a)

resistant

b)

brittle

c)

malleable

33.

What material is this?

a)

concrete

b)

asphalt

c)

brick

34.

What material is this?

a)

copper

b)

steel

c)

gold

35.

What property is this?

a)

insulation

b)

resistant

c)

malleable

36.

What material is this?

a)

rock

b)

wood

c)

glass

37.

What property is this?

a)

resistant

b)

lustrous

c)

tough

38.

What material is this?

a)

rock

b)

tiles

c)

lumber

39.

What material is this?

a)

asphalt

b)

concrete

c)

sand

40.

What material is this?

a)

gold

b)

iron

c)

copper

41.
A material you can see through is called ...
a)
Transparent
b)
Opaque
42.
An heat conductor...
a)
will not allow electricity to pass through it 
b)
will allow electricity to pass through it 
c)
will not allow heat to pass through it 
d)
will allow heat to pass through it 
43.
An heat insulator...
a)
will not allow electricity to pass through it 
b)
will allow electricity to pass through it 
c)
will not allow heat to pass through it 
d)
will allow heat to pass through it 
44.
Flexible means...
a)
bends easily 
b)
breaks if you bend it 
c)
scratches easily
45.
Brittle means...
a)
bends easily 
b)
breaks if you bend it 
c)
scratches easily
46.
The ability of a material to be shaped in all directions without cracking or breaking.
a)
hardness
b)
ductility
c)
malleability
d)
conductivity
47.
The ability of a material to deform, usually by stretching along its length. This property allows us to make wires.
a)
conductivity
b)
ductility
c)
malleability
d)
hardness
48.
At room temperature, most metals are
a)
liquid
b)
solid
c)
gas
d)
an alloy
49.
What is the ability of a substance to allow heat, sound, or electricity to flow through it?
a)
Malleability
b)
Ductility
c)
Solubility
d)
Conductivity
50.
What does malleable mean?
a)
able to be shaped
b)
will break easily
c)
can be used for wire
d)
is shiny
51.

The mechanical property that determines a material’s

ability to withstand scratches, dents, and cuts.

a)

Strength

b)

flexbility

c)

hardness

d)

elasticity

52.

A(n) ___________________________________________ is a characteristic that determines how a material reacts to

forces.

a)

physical property

b)

chemical property

c)

mechanical property

53.

material’s ability to stretch out of shape and

return to its original shape is _______

a)

Strength

b)

Elasticity

c)

hardness

d)

flexibility

54.

the properties that can be seen or measured without changing the materials are ____________ properties

a)

physical

b)

chemical

c)

mechanical

55.

a mixture of two or more metals

a)

Ceramics

b)

composites

c)

Alloys

56.
Is known as a "stretching force"
a)
force
b)
vector
c)
Tension
d)
scalar
57.
What is a force? 
a)
combination of all forces acting on an object
b)
is a push or a full
c)
when life is stable
d)
is an arrow that represents the magnitude and direction of a quantity
58.

An example of a mechanical property is .....

a)

the ability to rust.

b)

flexibility

c)

density

59.

A material that is translucent.

a)

Glass

b)

Wood

c)

Rubber

60.

A material that is translucent.

a)

Glass

b)

Wood

c)

Rubber

61.

Materials that are good conductors.

a)

Metal

b)

Wood

c)

Rubber

62.

Magnetism, density and conductivity are examples of ......

a)

Physical properties

b)

Chemical properties

c)

Mechanical properties

63.

A characteristic that determine how a material reacts to forces.

a)

Physical property

b)

Chemical property

c)

Mechanical property

64.
a)

X- Glass, Y- Copper, Z- Rubber

b)

X- Glass, Y- Rubber, Z- Copper

c)

X- Rubber, Y- Copper, Z- Glass

d)

X- Rubber, Y- Glass, Z- Copper

65.

How do you calculate elastic potential energy or work done by a spring? (Select all that apply)

a)

W = ½Fx

b)

W = ½kx²

c)

W = Fx

d)

W = ½Fx²

66.

Select all the correct units for stress.

a)

Pa

b)

Nm-2

c)

Nm2

d)

No unit

67.

What is the correct unit for strain?

a)

Pa

b)

Nm-2

c)

No unit

d)

Nm2

68.

The units for elastic potential energy are...

a)

Joules, J

b)

metres, m

c)

centimetres, cm

d)

kilograms, kg

69.
Which of the following springs is the stiffest?
a)
A spring that requires a froce of 2000 N to compress it by 6.8 m.
b)
A spring that requires a force of 4000 N to stretch it by 9.0 m. 
c)
A spring that requires a force of 8000 N to compress it by 45 m.  
d)
A spring that requires a force of 4800 N to stretch it by 14 m.
70.

Which letter is pointing to where the material will break?

a)

A

b)

B

c)

C

d)

D

71.

Which letter is pointing to the elastic limit?

a)

A

b)

B

c)

C

d)

D

72.

A wire is stretched 3 mm by a force of 150 N. Assuming the elastic limit is not exceeded, the force that will stretch the wire 5 mm is:

a)

150 N

b)

90 N

c)

250 N

d)

450 N

73.

The limit beyond which the material does not behave elastically is known as

a)

Proportional limit

b)

Plastic limit

c)

Elastic limit

d)

Yield Point

74.

Example of brittle material:

a)

iron steel

b)

aluminium

c)

concrete

d)

copper

75.

Ductile materials are defined as:

a)

materials that can be subjected to large strains before it fractures

b)

materials that exhibit little or no yielding before failure

c)

materials that cannot be subjected to large strains

d)

materials that are elastic

76.
A spring has a spring constant of 330 N/m.  How far is the spring compressed if 150 N of force are used?
a)
2.2 m
b)
0.0014 m
c)
5.0 m
d)
0.45 m
77.

The maximum stress that a material can comprehend before it breaks is called

(a)  

78.

Tick which point/points do you think that are obeying Hooke's Law

a)

Point A

b)

Point B

c)

Point C

d)

Point D

79.

Which of these does not obey Hooke's Law?

a)

elastic deformation

b)

plastic deformation

80.

A brittle material ...

a)

break without deforming

b)

changes its shape and size before breaking

81.

True or False: Strain is the fractional change in the dimensions of the object with unit of N⁻¹.

a)

True

b)

False

82.

True or False: Plastic deformation occurs when a material behaves within its elastic limit.

a)

True

b)

False

83.

The force that is applied on an object must be applied ___ to the surface of the object.

a)

parallel

b)

perpendicular

c)

at an angle θ

84.

Stretching occurs when ___ force is applied onto an object.

a)

compressive

b)

tensile

c)

radial

d)

explosive

85.

Stress has the same unit as ...

a)

Sound intensity

b)

Work

c)

Pressure

d)

Strain

86.

Increasing shearing force on a steel metal sheet results to lesser shear strain.

a)

True

b)

False

87.

Which of the following does NOT determine shear modulus?

a)

Force

b)

Area

c)

Shear strain

d)

Volume

88.

A 1-m long cord is pulled by a force causing its length to change by 2mm. Determine the strain.

a)

0.2

b)

0.02

c)

0.002

89.

A nylon string, has a diameter of 2mm, is pulled by a force of 100N. Determine the stress.

a)

315 MPa

b)

31.5 MPa

c)

3.15 MPa

90.

How much force is required to shear off a metal sheet whose thickness is 2mm and width of 40cm? The shear stress is 5 x 107 N/m2.

a)

400 kN

b)

40 kN

c)

4 kN

91.

Given the Young's modulus of elasticity below rank the metals according to the magnitude of tensile stress it can hold from highest to lowest.

Aluminum 69 GPa

Brass 125 GPa

Steel 200 GPa

a)

Aluminum, Brass, Steel

b)

Brass, Aluminum, Steel

c)

Steel, Brass, Aluminum

92.

This refers to the ratio of tensile stress to tensile strain.

a)

Bulk Modulus of elasticity

b)

Shear Modulus of Rigidity

c)

Young's Modulus of elasticity

93.

What relationship exists between applied force and strain?

a)

direct

b)

indirect

c)

none at all

94.

The tensile strength of ductile materials is __________ its compressive strength.

a)

equal to

b)

less than

c)

greater than

d)

none of the above

95.

A beam supported on more than two supports is called

a)

simply supported beam

b)

fixed beam

c)

overhanging beam

d)

continuous beam

96.

Stress-strain diagram has five stages in the material; select the correct sequence of the stages:

a)

Elastic region - Yielding - Strain hardening - Necking - Fracture

b)

Elastic region - Strain hardening - Yielding - Necking - Fracture

c)

Elastic region - Yielding - Necking - Strain hardening - Fracture

d)

Yielding - Elastic region - Necking - Strain hardening - Fracture

97.

Stress is divided into two categories:

a)

tensile and compressive

b)

tensile and deformation

c)

compressive and strain

d)

compressive and deformation

98.

Stress is defined as:

a)

force per unit area

b)

force per unit length

c)

force per unit mass

d)

force per unit time

99.

What are several things would happen if stress acting upon a material exceeding its proportionality limit?

a)

material can retain its length/shape once the force is removed

b)

material cannot retain its length/shape once the force is removed

c)

there would be a permanent set of elongation for the material

d)

material does not obey Hooke's Law

100.

What happen to the planes of atoms during upper yield point?

a)

Atom breaks

b)

Atom stay intact

c)

Planes of atoms starts sliding upon each other

d)

None of the above

101.

A region that starts from upper yield point is called

a)

Elastic region

b)

Hooke's Law region

c)

Plastic region

d)

None of the above

102.

Rank the points on the graphs of stress against strain from first point to final points

a)

proportionality limit, upper yield point, lower yield point, fracture, UTS

b)

proportionality limit,lower yield point, upper yield point, UTS, fracture

c)

lower yield point, proportionality limit, UTS, upper yield point, fracture

d)

None of above

103.

Volumetric Strain is

a)

Increase in length / original length

b)

Decrease in length / original length

c)

Change in volume / original volume

d)

All of the above

104.

Volumetric Strain is

a)

Increase in length / original length

b)

Decrease in length / original length

c)

Change in volume / original volume

d)

All of the above

105.

Compressive Strain is

a)

Increase in length / original length

b)

Decrease in length / original length

c)

Change in volume / original volume

d)

All of the above

106.

Which of the following is not a basic type of strain?

a)

Compressive strain

b)

Shear strain

c)

Volume strain

d)

Area strain

107.

When tensile stress is applied axially on a circular rod its

i) diameter decreases

ii) length increases

iii) volume decreases

Which of the above are true?

a)

Only i

b)

Only ii

c)

i & ii

d)

All of The Above

108.

When force is acting parallel to surface then the corresponding stress is known as

a)

Shear Stress

b)

Tensile stress

c)

Compressive stress

d)

Direct stress

109.

When force is acting parallel to surface then the corresponding stress is known as

a)

Shear Stress

b)

Tensile stress

c)

Compressive stress

d)

Direct stress

110.

Following are the basic types of stress except

a)

Tensile stress

b)

Compressive stress

c)

Shear stress

d)

Volumetric stress

111.

2. Stress is

a)

External force

b)

Internal resistive force

c)

Axial force

d)

Radial force

112.

Linear Strain is defined as

a)

Ratio of change in length to original length

b)

Elongation

c)

Decrease in length

d)

None of these

113.

What is the correct label for A and B shown in the figure below?

a)

A - Tension; B- Compression

b)

A - Compression; B - Tension

c)

A - Torsion; B - Tension

114.

What relationship exists between applied force and strain?

a)

direct

b)

indirect

c)

none at all

115.

A cylindrical rod of cross-sectional area A experienced pressure p due to a compressive force F. If the force applied is reduced to one-third what happens to pressure?

a)

also reduced to one-third

b)

tripled

c)

remains the same

116.

A change in shape in any structural component, or in the structure itself, because the material is unable to resist the force(s) acting on it is called....

a)

Flexibility

b)

Deformation

117.

The ability of a material to be bent under force repeatedly and not fail

a)

Flexibility

b)

Deformation

118.

Is it true that some structures need to be flexible in order to not break under the forces acting on them?

a)

Yes

b)

No

119.

Which of these are other considerations engineers look at when choosing a material? Check all that apply

a)

Aesthetics

b)

Effect on Environment

c)

Hardness

d)

Availability

120.

If a material has "tensile strength" this means that the material is...

a)

Resistant to heat

b)

Resistant to water

c)

Resistant to the internal force of tension

d)

Resistant to the internal force of compression

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