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6.9: Heat Treatments

Total questions: 88

Worksheet time: 48mins

Name
Class
Date
1.

Fill in the blank: Heat treatments are used to alter the _______ of materials.

a)

color

b)

texture

c)

properties

d)

size

2.

Fill in the blank: Materials and their _______ are crucial in engineering.

a)

colors

b)

properties

c)

sizes

d)

shapes

3.

What is the focus of section 6.4 in the document?

a)

Electrical measurements

b)

Heat treatments and surface treatments

c)

Data analysis

d)

Communication tools.

4.

What is the significance of understanding heat treatments?

a)

To change material properties

b)

To enhance color

c)

To reduce weight

d)

To increase size.

5.

Fill in the blank: Surface treatments are used to improve material _______.

a)

color

b)

durability

c)

weight

d)

size

6.

What is the role of PLCs in industrial settings?

a)

To control processes

b)

To store data

c)

To enhance communication

d)

To improve aesthetics

7.

Fill in the blank: PLCs are used to control _______ processes.

a)

industrial

b)

artistic

c)

educational

d)

recreational

8.

What are the types and functions of programmable logic controllers (PLCs)?

a)

They control electrical circuits

b)

They manage data storage

c)

They automate industrial processes

d)

They enhance communication networks.

9.

By understanding the function of PLCs, how can they be used?

a)

To improve safety

b)

To increase efficiency

c)

To reduce costs

d)

All of the above.

10.

Describe the objective of understanding heat treatment processes.

a)

To learn about chemical reactions

b)

To understand material properties

c)

To explore new technologies

d)

To study environmental impacts.

11.

Metal hardening involves heating alloys above the critical transformation temperature and then ______ rapidly.

a)

Cooling

b)

Heating further

c)

Painting

d)

Compressing

12.

Why are hardened materials usually tempered or stress relieved?

a)

To improve color

b)

To enhance electrical properties

c)

To improve dimensional stability and toughness

d)

To reduce cost

13.

What is precipitation hardening?

a)

A cooling process

b)

A heat treatment technique

c)

A welding method

d)

A painting technique.

14.

Precipitation hardening is used to increase yield strength and improve corrosion resistance by using alloying materials such as ____.

a)

Copper

b)

Iron

c)

Aluminum

d)

Zinc

15.

Which of the following is NOT a stage in the precipitation hardening process?

a)

A) Solution annealing

b)

B) Quenching

c)

C) Ageing

d)

D) Welding

16.

What is the first step of precipitation hardening called?

a)

Solution annealing

b)

Quenching

c)

Tempering

d)

Aging

17.

Solution annealing aims to transform inhomogeneities into ________.

a)

Liquids

b)

Solids

c)

Homogeneities

d)

Gases

18.

Typical quenching agents in precipitation hardening are water, oil, and ______.

a)

gas

b)

sand

c)

metal

d)

plastic

19.

Fill in the blank: The oversaturated solid solution transforms into _______ during the ageing process.

a)

single-phase alloys

b)

two-phase alloys

c)

liquid solutions

d)

gaseous compounds

20.

Tempering is generally considered effective in relieving stresses induced by ______.

a)

quenching

b)

heating

c)

cooling

d)

forging

21.

What is the primary purpose of annealing?

a)

To harden the metal

b)

To alter the metal's mechanical properties, making it softer and more workable

c)

To increase the metal's weight

d)

To change the metal's color.

22.

What are the types and functions of programmable logic controllers (PLCs)?

a)

Only for industrial automation

b)

Used in home appliances

c)

Types include relay logic, functions include automation

d)

None of the above

23.

PLCs are used so that basic electrical measurements can be made and calculations performed to determine unknown electrical quantities. (True/False)

a)

True

b)

False

24.

Fill in the blank: PLCs are used to _______ processes by understanding their function and how they can be used.

a)

automate

b)

complicate

c)

ignore

d)

simplify

25.

What is the purpose of annealing in heat treatment of metals?

a)

The purpose of annealing in heat treatment of metals is to harden the metal and increase its strength.

b)

The purpose of annealing in heat treatment of metals is to remove impurities and contaminants from the metal.

c)

The purpose of annealing in heat treatment of metals is to increase the metal's conductivity and thermal resistance.

d)

The purpose of annealing in heat treatment of metals is to soften the metal, relieve internal stresses, and improve ductility.

26.

Which subtopic of heat treatment involves heating a metal until it turns a specific colour (from a light straw through to a grey green) and then cooling?

a)

tempering

b)

annealing

c)

quenching

d)

case hardening

27.

What is the main advantage of quenching in heat treatment of metals?

a)

Enhances corrosion resistance

b)

Increases hardness

c)

Reduces hardness and strength

d)

Improves ductility and toughness

28.

Which subtopic of heat treatment involves heating a metal to a specific temperature and then rapidly cooling it?

a)

tempering

b)

aging

c)

quenching

d)

annealing

29.

What is the purpose of tempering in heat treatment of metals?

a)

The purpose of tempering in heat treatment of metals is to decrease strength.

b)

The purpose of tempering in heat treatment of metals is to improve toughness and ductility.

c)

The purpose of tempering in heat treatment of metals is to reduce the melting point.

d)

The purpose of tempering in heat treatment of metals is to increase hardness.

30.

Which subtopic of heat treatment involves reheating a quenched metal to a temperature below its critical point and then cooling it?

a)

normalizing

b)

hardening

c)

tempering

d)

annealing

31.

What is the main advantage of case hardening in heat treatment of metals?

a)

Increased surface hardness with decreased core toughness.

b)

Improved corrosion resistance while maintaining core toughness.

c)

Decreased surface hardness while maintaining core toughness.

d)

Increased surface hardness while maintaining core toughness.

32.

Which subtopic of heat treatment involves adding a hard layer to the surface of a metal while maintaining a tough core?

a)

case hardening

b)

annealing

c)

quenching

d)

tempering

33.

What is the purpose of normalization in heat treatment of metals?

a)

To decrease the melting point of the metal.

b)

To prevent corrosion of the metal.

c)

To remove internal stresses and improve mechanical properties.

d)

To increase the hardness of the metal.

34.

Which subtopic of heat treatment involves heating a metal above it's upper critical temperature and then cooling it in still air?

a)

quenching

b)

tempering

c)

case hardening

d)

normalising

35.

(a)   cannot be hardened due to the amount of carbon it contains. In order for the hardening process to be effective, the material must be composed of more than ​ (b)   ​ carbon​.

Choose from the below words
Low-carbon steel
Non-ferrous metal
Cast iron
High-carbon steel
0.3%
3%
5.3%
13%
36.

Why are hardened materials nearly always tempered?

a)

To reduce the brittleness as this will cause a part to break easily when a force is applied.

b)

To increase the hardness beyond what can be achieved through hardening alone.

c)

To improve the material's flexibility without affecting its toughness.

d)

To make the material more resistant to rust and corrosion.

37.

  • What is meant by the term 'carburising'?

a)

  • A technique for increasing the metal's toughness by rearranging its grain structure.

b)

  • A heat treatment process that adds carbon to the surface of a metal to increase hardness.

c)

  • A method for improving the metal's thermal conductivity by introducing carbon.

d)

  • A process that increases the material's resistance to wear by altering its crystalline structure.

38.

What is the main purpose of hardening in heat treatment of metals?

a)

To increase the metal's ductility and toughness.

b)

To enhance the metal's surface hardness and wear resistance.

c)

To improve the metal's thermal conductivity.

d)

To reduce the metal's brittleness.

39.

Which heat treatment process involves heating a metal to a high temperature and then cooling it slowly in a furnace?

a)

quenching

b)

annealing

c)

tempering

d)

normalizing

40.

What is meant by the term "normalising?"

a)

  1. A process that increases the toughness of metal by introducing carbon to its surface.

b)

  1. A method for controlling the hardness of metal by heating it and then cooling it rapidly.

c)

  1. A procedure that enhances the metal's resistance to heat by refining its microstructure.

d)

  1. A process used to refine the grain structure and relieve internal stresses in metal.

41.

How does the grain size alter in steel before and after annealing?

a)

  1. Annealing reduces the grain size, making the steel harder and more brittle.

b)

  1. The grain size remains unchanged after annealing, but the internal stresses in the steel are reduced.

c)

  1. Annealing increases the grain size by allowing grains to grow, which softens the steel and improves ductility.

d)

  1. Annealing completely refines the grain structure, transforming the steel into a much stronger material.

42.

Draw a picture of a dog heat treating metal

43.
Which of the following is NOT a characteristic of most metals?
a)
Brittle
b)
Good conductor
c)
Ductile
d)
Malleable
44.
When an object shatters when struck by a hammer.
a)
luster
b)
malleable
c)
brittleness
d)
ductile
45.
When an object changes shape when struck by a hammer.
a)
luster
b)
malleable
c)
brittleness
d)
ductile
46.
If you have a material that can conduct electricity well it is probably a...
a)
Metalloid
b)
Matter
c)
Non-metal
d)
Metal
47.
What physical properties are used to classify elements as metals, non-metals, or metalloids?
a)
Color, smell, physical state
b)
Reactivity, streak, hardness
c)
Ability to burn, mass, density
d)
Luster, conductivity, malleability
48.

What below best describes the strenght term ?

a)

measure of how much tension the metal can resist

b)

when subjected to stress, it breaks without significant plastic deformation

c)

is the ability of a solid to bend or be hammered into other shapes without breaking.

d)

is a heat treatment technique applied to ferrous alloys, such as steel or cast iron, to achieve greater toughness by decreasing the hardness of the alloy.

49.

What below best describes the term brittleness?

a)

measure of how much tension the metal can resist

b)

when subjected to stress, it breaks without significant plastic deformation

c)

is the ability of a solid to bend or be hammered into other shapes without breaking.

d)

is a heat treatment technique applied to ferrous alloys, such as steel or cast iron, to achieve greater toughness by decreasing the hardness of the alloy.

50.

What below best describes the term malleability?

a)

measure of how much tension the metal can resist

b)

when subjected to stress, it breaks without significant plastic deformation

c)

is the ability of a solid to bend or be hammered into other shapes without breaking.

d)

is a heat treatment technique applied to ferrous alloys, such as steel or cast iron, to achieve greater toughness by decreasing the hardness of the alloy.

51.

What below best describes the term temper?

a)

measure of how much tension the metal can resist

b)

when subjected to stress, it breaks without significant plastic deformation

c)

is the ability of a solid to bend or be hammered into other shapes without breaking.

d)

is a heat treatment technique applied to ferrous alloys, such as steel or cast iron, to achieve greater toughness by decreasing the hardness of the alloy.

52.

What below best describes the term quenching?

a)

is the rapid cooling of a workpiece in water, oil or air to obtain certain material properties

b)

when subjected to stress, it breaks without significant plastic deformation

c)

is the ability of a solid to bend or be hammered into other shapes without breaking.

d)

is a heat treatment technique applied to ferrous alloys, such as steel or cast iron, to achieve greater toughness by decreasing the hardness of the alloy.

53.

What below best describes the term annealing?

a)

is the rapid cooling of a workpiece in water, oil or air to obtain certain material properties

b)

when subjected to stress, it breaks without significant plastic deformation

c)

is the ability of a solid to bend or be hammered into other shapes without breaking.

d)

is a heat treatment that alters the physical and sometimes chemical properties of a material to increase its ductility and reduce its hardness, making it more workable.

54.

What process is happening in this image?

a)

annealing

b)

hardening

c)

forging

d)

Quenching

55.

What process is happening in this image?

a)

annealing

b)

hardening

c)

forging

d)

Quenching

56.

What process is happening in this image?

a)

annealing

b)

hardening

c)

forging

d)

Quenching

57.

What is the equipment called?

a)

Metal frog

b)

Fire forge

c)

Metal forge

d)

Blacksmiths fire

58.

What is this equipment called?

a)

anvile

b)

anvil

c)

avile

d)

avil

59.

What is this guy trying to explain?

a)

That annealed metals increase in ductility and reduces its hardness, making it more spring back and forth

b)

That annealed metals become covered

c)

That annealed metals increase in ductility and rmake it bend to an arch

d)

That annealed metals increase in ductility and reduces its hardness, making it more workable.

60.

How can you tell if aluminium has been annealed?

a)

The metal turns red

b)

The soap on it turns black

c)

The soap sticks

d)

The metal goes blue

61.

What can you not quench with?

a)

Fire bricks

b)

Air

c)

Oil

d)

Water

62.

What is the specific name of this PPE?

a)

Welding gauntlets

b)

Welding gloves

c)

Leather gloves

d)

Protective welders gloves

63.

This piece of equipment can be used to anneal aluminium, what is it called?

a)

Hot torch

b)

Flame torch

c)

Brazing torch

d)

Brass torch

64.

Definition of heat treatment of steel

a)

controlled heating and cooling of metals

b)

alter their physical and mechanical properties

c)

performed after metals undergo metal work such as cold roll, drawing, extrusion and etc

d)

causes the material properties of metals change

65.

FALSE of purpose heat treatment

a)

to improve machinability

b)

refine grain size

c)

to produce a hard surface on a ductile interior

d)

to decrease mechanical properties

66.

FALSE of heat treatment cycle

a)

heating

b)

cooling

c)

annealing

d)

soaking

67.

Types of heat treatment

a)

normalizing

b)

normalization

c)

fast cooling

d)

temperature

68.

Annealing is

a)

normal cooling

b)

fast cooling

c)

decrease ductility

d)

refine grain

69.

soaking is

a)

soaked to enough time and let the changing happen

b)

heated to certain temperature

c)

soaked to certain temperature

d)

soaked to certain rate

70.

microstructure after

a)

annealing

b)

normalizing

c)

quenching

d)

tempering

71.

how to increase hardness of steel

a)

by doing annealing

b)

by doing quenching

c)

by doing normalizing

d)

by doing full annealing

72.

how to decrease softness of steel

a)

by doing annealing

b)

by doing quenching

c)

by doing normalizing

d)

by doing stress relieving annealing

73.

which one will produce martensite phase

a)

annealing

b)

normalizing

c)

quenching

d)

full annealing

74.

What is the purpose of annealing in heat treatment?

a)

The purpose of annealing in heat treatment is to increase the melting point of metals.

b)

The purpose of annealing in heat treatment is to remove impurities from metals.

c)

The purpose of annealing in heat treatment is to soften metals and improve their ductility, toughness, and machinability.

d)

The purpose of annealing in heat treatment is to harden metals and make them more brittle.

75.

Which heat treatment process involves heating a metal to a high temperature and then cooling it rapidly?

a)

normalising

b)

annealing

c)

hardening

d)

tempering

76.

What is the main purpose of the hardening heat treatment?

a)

To reduce the material's hardness and strength.

b)

To prevent the material from cracking.

c)

To increase the material's ductility and toughness.

d)

To increase the materials hardness and strength.

77.

Which heat treatment process involves heating a metal to a specific temperature and then cooling it slowly in a furnace?

a)

annealing

b)

normalizing

c)

tempering

d)

hardening

78.

What is the purpose of tempering in heat treatment?

a)

To decrease the toughness of the steel.

b)

To increase the hardness of the steel.

c)

To prevent the steel from rusting.

d)

To improve toughness and ductility of hardened steel.

79.

Which quenching medium cannot be used during a hardening heat treatment process?

a)

oil

b)

water

c)

brine

d)

air

80.

Which quenching medium gives the most severe form of quenching (causes most rapid cooling)?

a)
brine
b)
water
c)
oil
d)
air
81.

What is the main purpose of normalizing in heat treatment?

a)

To increase the hardness of the metal.

b)

To decrease the ductility of the metal

c)

To increase the brittleness of the metal.

d)

To refine the grain structure so that other heat treatments or mechanical processes can be carried out.

82.

Which heat treatment process involves heating a metal to a temperature above its critical point and then allowing it to cool in air?

a)

tempering

b)

normalizing

c)

hardening

d)

annealing

83.

What is the effect of annealing on the hardness of a metal?

a)

Annealing increases the hardness of a metal.

b)

Annealing has no effect on the hardness of a metal.

c)

Annealing makes the metal brittle.

d)

Annealing reduces the hardness of a metal.

84.

Which heat treatment process is used to reduce internal stresses in a metal?

a)

normalising

b)

hardening

c)

annealing

d)

tempering

85.

Why is it necessary to finish grind metals that have undergone a hardening heat treatment?

a)

the high temperatures causes the metal to burn off in some places

b)

the rapid cooling during the hardening process causes distortion of the metal

86.

Which steel cannot undergo a hardening heat treatment process?

a)

low carbon steel

b)

medium carbon steel

c)

high carbon steel

87.

Hardening heat treatment is done after a tempering heat treatment.

a)

true

b)

false

88.

Which heat treatment process essentially 'factory resets' a metal's properties?

a)

normalising

b)

hardening

c)

annealing

d)

tempering

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