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6.10 Surface treatments

Total questions: 83

Worksheet time: 1hrs 2mins

Name
Class
Date
1.

What is the purpose of understanding how processing techniques affect material properties?

a)

To improve aesthetic appeal

b)

To choose the correct material for an engineering application

c)

To reduce costs

d)

To increase weight

2.

By researching different materials, we can understand how processing techniques affect material properties. Fill in the blank: This is important so that the correct material for an _______ application can be chosen.

a)

artistic

b)

engineering

c)

culinary

d)

educational

3.

What is the main objective of understanding how processing techniques affect material properties?

a)

To improve aesthetic appeal

b)

To enhance durability

c)

To reduce cost

d)

To increase weight

4.

By researching different materials, engineers can choose the correct material for an engineering application. This is important because ______.

a)

it reduces production time

b)

it ensures safety

c)

it lowers costs

d)

it improves aesthetics

5.

Which of the following is a surface treatment method used to protect materials?

a)

Painting

b)

Welding

c)

Soldering

d)

Casting

6.

Fill in the blank: _______ is a surface treatment that involves applying a protective layer of plastic to a substrate.

a)

A) Painting

b)

B) Plastic coating

c)

C) Galvanising

d)

D) Barrier protection

7.

What is one of the benefits of applying paint to a material surface?

a)

It makes the material heavier

b)

It protects the material from oxidation and corrosion

c)

It changes the color of the material

d)

It makes the material more flexible.

8.

Applying paint to a material surface can alter the manner in which the material reacts to external forces and can protect the material from ______.

a)

oxidation

b)

flexibility

c)

weight

d)

transparency

9.

What is the process of plastic coating?

a)

Immersing a preheated part into liquid plastisol

b)

Painting a part with acrylic paint

c)

Dipping a part in molten metal

d)

Spraying a part with water

10.

Plastic coating can enhance the appearance of a part and provide a soft grip. It can also protect the part from chemicals and ______.

a)

A) Heat

b)

B) Abrasion

c)

C) Water

d)

D) Light

11.

What is the primary purpose of galvanising?

a)

To enhance the appearance of metal

b)

To prevent corrosion

c)

To increase weight

d)

To conduct electricity

12.

Galvanising involves the application of a ______ coating to the surface of a metal.

a)

Copper

b)

Zinc

c)

Silver

d)

Gold

13.

What is the purpose of applying a zinc coating to a surface?

a)

To enhance color

b)

To form a protective barrier

c)

To increase weight

d)

To reduce cost

14.

When zinc coating is applied, it forms a protective layer that is impervious to air and moisture, thus preventing ______.

a)

Oxidation

b)

Corrosion

c)

Rusting

d)

Tarnishing

15.

What is another name for galvanic protection?

a)

Anodic protection

b)

Cathodic protection

c)

Electrolytic protection

d)

Passive protection

16.

In galvanic protection, zinc acts as the _______ because it is highly reactive and electronegative.

a)

cathode

b)

anode

c)

insulator

d)

conductor

17.
What is corrosion?
a)
The release of oxygen
b)
Breakdown of a metal
18.
Iron rust in the presence of:
a)
Vacuum
b)
Moisture
c)
Oxygen
d)
Moisture and Oxygen
19.
To protect iron against corrosion, the most durable metal plating on it, is:
a)
Zinc plating
b)
Nickel plating
20.
Is this an example of corrosion?
a)
Yes
b)
No
21.

What is the chemical nature of rust?

a)

iron (II) oxide

b)

hydrated iron (II) oxide

c)

iron (III) oxide

d)

hydrated iron(III) oxide

22.

What conditions are required for rusting?

a)

water only

b)

oxygen only

c)

water and oxygen

23.

What is oxidation?

a)

A reaction involving oxygen

b)

A reaction involving non-metals

24.

Name the two general classifications of corrosion.

a)

Direct chemical attack and Electrochemical attack.

b)

Fretting corrosion and Galvanic attack.

25.

Rusting is a _____________ process.

a)

Mechanical

b)

Chemical

c)

Physical

26.

Rusting can be prevented by

a)

Alloying

b)

Tinning

c)

Galvanizing

d)

All of above

27.

two types of Noble metals

a)

gold and platinum

b)

iron and copper

c)

stainless steel and aluminum

d)

tin and brass

28.

Coating of Zn, Al and Cd on steel are _________ , because their electrode potentials are lower

a)

Cathodic

b)

Anodic

c)

Not affecting

d)

Expensive

29.

What property do all metals have?

a)

They are soluble in water.

b)

They conduct electricity.

c)

They have low melting points.

d)

They have low densities.

30.

Which metal would be the best to make the body of an aircraft?

a)

Resistance to corrosion: high

Density: high

b)

Resistance to corrosion: High

Density: low

c)

Resistance to corrosion: low

Density: high

d)

Resistance to corrosion: low

Density: low

31.

The steel bodies of cars can be protected from rusting by spraying them with zinc.

Why is zinc used?

a)

Zinc does not react with acidic exhaust fumes.

b)

Zinc forms a stable compound with iron.

c)

Zinc has a high melting point.

d)

Zinc is higher in the reactivity series than iron.

32.

Process of coating metals with zinc is called (a)  

33.

Which metals rusts?

a)

Copper

b)

manganese

c)

iron

d)

potassium

34.

What environmental element assists rusting?

a)

nitrogen

b)

oxygen

c)

carbon

d)

hydrogen

35.

What is the chemical name given to Rust ?

a)

Iron dioxide

b)

Iron oxide

c)

Steel oxide

d)

Carbon dioxide

36.

What prevents Rusting

a)

Painting , Oiling , Galvinising

b)

Washing with water

37.

Which of the following is / are examples of sacrificial protection against rusting?

(1) Iron object coated with tin

(2) Underground iron pipes connected to magnesium bars

(3) Iron railings coated with paint

a)

(1) only

b)

(2) only

c)

(1) and (3) only

d)

(2) and (3) only

38.

All alloys are mixtures.

a)

True

b)

False

39.

Which environmental elements can affect metals?

a)

Pressure and gravity

b)

Light and sound

c)

Wind and humidity

d)

Temperature and moisture

40.

What is the first step in the finishing process for metals?

a)

Heating the metal

b)

Using abrasive products to smooth surfaces

c)

Applying a protective coating

d)

Painting the metal

41.

Why might a coating be applied to metal surfaces?

a)

To make them less cold and slippery

b)

To change their thermal properties

c)

To make them heavier

d)

To increase their magnetic properties

42.

.............. is a term applied to materials that do not need any extra finishing techniques applied?

a)

Self Finishing

b)

Applied Finishing

43.

................... are those finishes that need an extra process in the manufacture of a product to improve the look of the material?

a)

Self Finishing

b)

Applied Finishing

44.

An example of a self finished product is.....

a)

TV

b)

Kettle

c)

Phone cases

d)

All of the above

45.

This picture shows an example of what type of finish?

a)

Blue and Oil

b)

Lacquer

c)

Painting

d)

Enamelling

46.

This picture shows an example of what type of finish?

a)

Spray

b)

Painting

c)

Lacquer

d)

Anodising

47.

This picture shows an example of what type of finish?

a)

Painting

b)

Enamelling

c)

Polishing

d)

Spray

48.

This picture shows an example of what type of finish?

a)

Galvanising

b)

Lacquer

c)

Painting

d)

Anodising

49.

This picture shows an example of what type of finish?

a)

Polishing

b)

Aluminium Alloys

c)

Painting

d)

Galvanising

50.

This picture shows an example of what type of finish?

a)

Galvanising

b)

Aluminium Alloys

c)

Spray

d)

Plastic dip coating

51.

This picture shows an example of what type of finish?

a)

Painting

b)

Plastic Dip coating

c)

Lacquer

d)

Blue and oil

52.

What is the primary purpose of applying a plastic coating to ferrous metals?

a)

To enhance the metal's appearance

b)

To prevent rusting

c)

To increase the metal's weight

d)

To make the metal more flexible

53.

What is the name of the tank used in the plastic dip coating process?

a)

Mixer

b)

Fluidiser

c)

Reactor

d)

Blender

54.

What is the first step in the plastic coating process?

a)

Heat the metal to 180°C

b)

Dip the metal into the fluidised plastics powder

c)

Thoroughly clean and degrease the metal

d)

Return it to the oven to fuse the coating

55.

What happens to the powdered plastic when air passes through it in the fluidiser?

a)

It solidifies

b)

It behaves like a liquid

c)

It evaporates

d)

It changes colour

56.

What is the final step in the plastic coating process?

a)

Heat the metal to 180°C

b)

Dip the metal into the fluidised plastics powder

c)

Return it to the oven to fuse the coating

d)

Leave it to cool

57.

Which of the following items is NOT mentioned as being commonly coated with plastic?

a)

Wire metal baskets

b)

Racks

c)

Handles for tools

d)

Metal pipes

58.

Ability to be stretched without breaking (eg. copper)

a)

Toughness

b)

Ductility

c)

Malleability

d)

Tensile Strength

59.

If 2 products are left outside, 1 made from Ferrous Metal, and 1 made from a Non-Ferrous metal which one will corrode first?

a)

Non-Ferrous Metal

b)

Ferrous Metal

60.

Which material listed below is a Ferrous Metal?

a)

Copper

b)

Brass

c)

Zinc

d)

Cast Iron

61.

Which one of the metals below is a Non-Ferrous metal

a)

Mild Steel

b)

Cast Iron

c)

Zinc

d)

Wrought Iron

62.

Which of these materials is not a composite material

a)

Carbon Fibre

b)

Glass-reinforced Plastic (GRP)

c)

High Carbon Steel

d)

Kevlar

63.

Ability to be stretched without breaking (eg. copper)

a)

Toughness

b)

Ductility

c)

Malleability

d)

Tensile Strength

64.

Resistant to breaking and bending

a)

Toughness

b)

Hardness

c)

Compressive Strength

d)

Corrosive Resistance

65.

The ability to be pressed, spread-out or hammered

a)

Elasticity

b)

Malleability

c)

Ductility

d)

Tensile Strength

66.

The ability of a material to resist scratching, cutting or wear-and-tear

a)

Hardness

b)

Compressive Strength

c)

Conductivity (thermal)

d)

Toughness

67.

Very strong under pressure

a)

Malleable

b)

Tensile

c)

Compressive Strength

d)

Ductile

68.

The ability of a material to without breaking or snapping. Retains strength when stretched.

a)

Conductivity

(|Thermal)

b)

Malleability

c)

Ductilility

d)

Tensile

Strength

69.

The ability of the material to conduct an electric current. 

a)

Corrosive Resistance

b)

Ductilility

c)

Conductivity

(electrical)

d)

Elasticity

70.

Ability to regain its original shape (eg. rubber)

a)

Tensile Strength

b)

Elasticity

c)

Compressive Strength

d)

Malleability

71.

Property changes due to working (eg. bending steel back and forth)

a)

Environmental degradation

b)

Work Hardening

c)

Hardness

d)

Ductility

72.

Will snap easily and will not bend (eg. glass)

a)

Tensile Strength

b)

Ductility

c)

Brittleness

d)

Conductivity (Thermal)

73.

Ability to conduct heat (most metals such as steel cooking pans)

a)

Conductivity (Thermal)

b)

Conductivity (Electrical)

c)

Corrosive Resistance

d)

Ductility

74.

If it will corrode in the environment it is working in (eg. Iron rusts)

a)

Environmental Degradation

b)

Compressive Strength

c)

Conductivity (Thermal)

d)

Corrosive Resistance

75.

How the material corrodes and degrades in an environment (salt, water, weather, fire)

a)

Malleability

b)

Environmental Degradation

c)

Work hardening

d)

Compressive Strength

76.
The electric field strength at which the dielectric breakdown occurs is known as _________________
a)
dielectric voltage
b)
dielectric strength
c)
dielectric constant
d)
avalanche breakdown
77.

Coating (especially aluminium)

with a protective layer is called...

a)

Anodising

b)

Bio-stoning

c)

Electroplating

78.

Biological finishes that use natural enzymes to change

a ……….. appearance.

a)

Anodising

b)

Bio-stoning,

bio-polishing

c)

Electroplating

79.

Coating an object with a thin layer of metal by use of electricity.

a)

Anodising

b)

Electroplating

c)

Galvanising

80.

A process of coating steel with zinc

a)

Galvanising

b)

Chrome planting

c)

Laminating

81.

Powder applied electrostatically and then cured under heat. ie: the powder is attracted to the electrostatically charged item then it's baked is called...

a)

Dry Powder Coating

b)

Plastic coating

c)

Plastic wrapping

82.

A highly reflective coating used to improve durability and aesthetics.

a)

Galvanising

b)

Electroplating

c)

Chrome plating

83.

Coating a surface by dipping it into liquid plastisol (a liquid vinyl)

a)

Dip coating

b)

Powder coating

c)

Plastic laminating

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