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ES404 Quiz 2

Total questions: 70

Worksheet time: 42mins

Name
Class
Date
1.

What property of a material is measured by the area under the stress-strain curve

a)

Elastic modulus

b)

Yield strength

c)

Toughness

d)

Ultimate tensile strength

2.

Check all that applies:


What are the Mechanical Properties of Engineering Materials?

a)

toughness

b)

weldability

c)

chemical composition

d)

resilience

3.

It is defined as the restoring force per unit area of the material.

a)

stress

b)

strain

c)

fatigue

d)

elasticity

4.

It is defined as the ability of a material to absorb the energy and gets plastically deformed without fracturing.

a)

toughness

b)

strength

c)

ductility

d)

fatigue

5.

It is the ability of a material to attain the hardness by heat treatment processing.

a)

hardness

b)

hardenability

c)

brittleness

d)

malleability

6.

Which of the 3 figures shows brittleness?

a)

A

b)

B

c)

C

7.

Which of the 3 figures shows the most ductile material?

a)

A

b)

B

c)

C

8.

Which of the following is TRUE about malleability of a material?

a)

malleability indicates how hard a material gets deformed under compressive stress.

b)

malleability is the ability of a material to be formed by melting.

c)

malleability si temperature independent.

d)

malleability is the ability of a material to be formed by hammering or rolling.

9.

During a tensile test on a ductile material ____________

a)

Nominal stress at fracture is higher than the ultimate stress

b)

True stress at fracture is higher than the ultimate stress

c)

True stress a fracture is the same as the ultimate stress

d)

None of the mentioned

10.

When equal and opposite forces applied to a body, tend to elongate it, the stress so produced, is called ____________

a)

Shear stress

b)

Compressive stress

c)

Tensile stress

d)

Transverse stress

11.

In a tensile test, near the elastic limit zone ____________

a)

Tensile stress increases in linear proportion to the stress

b)

Tensile stress increases at a faster rate

c)

Tensile stress decreases at a faster rate

d)

None of the mentioned

12.

The phenomenon of slow growth of strain under a steady tensile stress is called ____________

a)

Yielding

b)

Creeping

c)

Breaking

d)

None of the mentioned

13.

In a tensile test on mild steel specimen, the breaking stress as compared to ultimate tensile stress is

a)

More

b)

Less

c)

Same

d)

More/Less depending on composition

14.

In a tensile test, near the elastic limit zone, the

a)

Tensile strain increases more quickly

b)

Tensile strain decreases more quickly

c)

Tensile strain increases in proportion to the stress

d)

Tensile strain decreases in proportion to the stress

15.

Tensile test can be performed on

a)

Impact testing machine

b)

Universal testing machine

c)

Rockwell tester

d)

Brinell tester

16.

Which machine records the change in length of specimen?

a)

Impact testing machine

b)

Universal testing machine

c)

Rockwell tester

d)

Brinell tester

17.

The ability of the material to resist stress without failure is called

a)

Strength

b)

Hardness

c)

stiffness

d)

toughness

18.

_____ occurs when metal is subjected to a constant tensile load at an elevated temperature?

a)

Fatigue

b)

Creep

c)

Impact

d)

Wear

19.

Creep is a ____ dependent phenomenon.

a)

Temperature

b)

Time

c)

Load

d)

Stress cycle

20.

The ______ the melting point and the _____ the elastic modulus, the higher is creep strength.

a)

Lower, lower

b)

Lower, higher

c)

Higher, lower

d)

Higher, higher

21.

Which one of the following, is a static mechanical property?

a)

Impact strength

b)

Creep strength

c)

Fatigue strength

d)

Rebound hardness

22.

With which factor, a magnitude of creep doesn’t increase?

a)

Temperature

b)

Time

c)

Grain Size

d)

Stress

23.

Hardness test is the ability of a material

to resist

a)

Scratching

b)

Wear and tear

c)

Indentation.

d)

Fracture

24.

The following tests are hardness test

a)

Tensile test.

b)

Vickers Test

c)

Rockwell Test

d)

Creep Test.

25.

Which of following tests uses spherical indenter.

a)

.Brinell test.

b)

Vickers Test

c)

Rockwell Test

d)

Creep Test.

26.

Which of following tests uses pyramid indenter

a)

.Brinell test.

b)

Vickers Test

c)

Rockwell Test

d)

Creep Test.

27.

In following Brinell hardness quotation

(1800 HBW 10/3000/30 ) , HBW means

a)

Test time.

b)

Diameter of indenter

c)

The applied force.

d)

Indenter material.

28.

In following Brinell hardness quotation

(1800 HBW 10/3000/30 ) , 10 is for

a)

Test time.

b)

Diameter of indenter

c)

The applied force.

d)

Indenter material.

29.

Energy stored within elastic limit is

a)

toughness

b)

resilience

c)

modulus of elasticity

30.

Young's Modulus is measure of

a)

hardness

b)

stiffness

c)

ductility

d)

strength

31.

% elongation is

a)

measure of malleability

b)

measure of hardness

c)

measure of ductility

d)

all of these

32.

strength of the material depends on

a)

load applied on the material

b)

shape & size of the component

c)

both the options are correct

d)

none of the options are correct

33.

Hardness of thin hard sample is measured by

a)

Brinell Hardness Test

b)

Knoop Hardness Test

34.

Which of the following is true?

a)

true stres is more than eng. stress but true strain is less than eng. strain

b)

true stres is less than eng. stress and true strain is less than eng. strain

c)

true stres is more than eng. stress and true strain is more than eng. strain

d)

true stres is less than eng. stress but true strain is more than eng. strain

35.

Name four SEQUENTIAL regions characterised from conventional stress-strain diagram of typical ductile materials

a)

Elastic -> Strain hardening -> Yielding -> Necking

b)

Elastic -> Yielding -> Strain hardening -> Necking

c)

Elastic -> Yielding -> Necking -> Strain hardening

36.

And which region is mainly of interest?

a)

Plastic

b)

Strain hardening

c)

Yielding

d)

Elastic

37.

In solid mechanics, plastic deformation can be defined as deformation in which:

a)

the material return back to its original position after load is removed

b)

the material undergoes a temporary change

c)

the material cannot return back to its original position after load is removed

d)

the material undergoes a reversible process

e)

none of the above

38.

Which of the following is not one of the critical points for strength specification on the stress-strain diagram:

a)

Yield stress

b)

Proportional limit

c)

Necking

d)

Elastic limit

e)

Fracture stress

39.

On the stress-strain curve, there are four regions. Which is the following is not a region on the stress-strain curve:

a)

Necking

b)

Yielding

c)

Elastic region

d)

Strain hardening

e)

Ultimate stress

40.

Stress / strain =

a)

Modulus of elasticity

b)

Modulus of ductility

c)

Modulus of liquicity

d)

All of the above

41.
The ability of a material to deform, usually by stretching along its length
a)
plasticity
b)
ductility
c)
malleability
d)
elasticity
42.
What property does a diaper have?
a)
It is white
b)
It is absorbent
c)
It is hard
d)
All of the above
43.
What property of a raincoat makes it useful?
a)
It is absorbent
b)
It is not absorbent
c)
It is soft
d)
It is pink
44.

Rubber band is an example of what property of material?

a)

Malleability

b)

Flexibility

c)

Elasticity

45.

This property of material has need to change first before a certain property can be observed?

a)

Physical Property

b)

Chemical Property

46.

A characteristic of material that be readily observed without changing its composition. What property it is?

a)

Physical Property

b)

Chemical Property

47.

Hardness is the ability of material to be rigid pressure that may cause deformation or change in its shape. Example, metal and wood.

a)

TRUE

b)

FALSE

48.
What is heat conduction?
a)
The flow of ice from one object to another
b)
Heat that flows easily from one object to another as the objects are touching
c)
Something that resist the flow of heat
d)
An oven mitt is an example of a heat conductor
49.

What material can conduct heat and electricity, can be hammered into different shapes, and can bej drawn into a wire.

a)

metal

b)

plastic

c)

cloth

d)

glass

50.

It is the ability of solids to be hammered into thin sheets.

a)

Malleability

b)

Elasticity

51.

It is the ability of material that does not allow heat to flow.

a)

Insulator

b)

Conductivity

52.

It refers to the ability of materials to resist scratching.

a)

Strength

b)

Hardness

53.

It is the ability of particles of matter to be drawn close together or be made compact.

a)

Malleability

b)

Compressibility

54.

It is the ability of a material to allow heat to flow.

a)

Conductivity

b)

Insulator

55.

What is the phase change of a solid to a liquid?

a)

freezing

b)

melting

c)

boiling

d)

condensation

56.

Which of the following factors does NOT typically affect the rate of a chemical reaction?

a)

Temperature

b)

Concentration of reactants

c)

Presence of a catalyst

d)

Molecular weight of the products

57.

Which type of bonding is responsible for the high electrical conductivity of metals?

a)

Covalent bonding

b)

Ionic bonding

c)

Metallic bonding

d)

Hydrogen bonding

58.

What is the primary function of a corrosion inhibitor?

a)

Increase the rate of corrosion

b)

Initiate corrosion reactions

c)

Slow down or prevent corrosion

d)

Enhance metal conductivity

59.

The process of passivation is most commonly associated with which type of materials?

a)

Metals

b)

Polymers

c)

Ceramics

d)

Semiconductors

60.

Which property is characteristic of a substance undergoing a chemical change?

a)

Change in color

b)

Change in density

c)

Change in phase

d)

Change in mass

61.

The phenomenon of superconductivity is characterized by:

a)

Infinite electrical resistance

b)

High thermal conductivity

c)

Low magnetic susceptibility

d)

Rapid elastic deformation

62.

e property that describes a material's ability to conduct heat is known as:

a)

Thermal diffusivity

b)

Thermal conductivity

c)

Specific heat capacity

63.

Which physical property is associated with a material's ability to absorb and release heat without undergoing a phase change?

a)

Thermal expansion

b)

Specific heat capacity

c)

Thermal conductivity

d)

Melting point

64.

The concept of relative density (specific gravity) compares the density of a substance to the density of:

a)

Water

b)

Air

c)

Iron

d)

Gold

65.

Which property is inversely proportional to density, meaning that as one increases, the other decreases?

a)

Hardness

b)

Compressibility

c)

Elasticity

d)

None of the above

66.

Which factor is primarily responsible for the difference in melting points between molecular compounds and ionic compounds?

a)

Size of molecules

b)

Type of bonding

c)

Molecular weight

d)

Density

67.

Which of the following substances is likely to have the highest boiling point?

a)

Methane

b)

Ethanol

c)

Water

d)

Hydrogen chloride

68.

Which of the following materials is typically an insulator?

a)

Copper

b)

Silicon

c)

Graphite

d)

Rubber

69.

What is the SI unit of electrical conductivity?

a)

Ohm

b)

Siemens

c)

Ampere

d)

Volts

70.

What is the role of impurities in the electrical conductivity of semiconductors?

a)

Increase conductivity

b)

Decrease conductivity

c)

Have no effect on conductivity

d)

Convert semiconductors into insulators