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Engineering and Manufacturing (Level 3) - Session Objectives

Total questions: 77

Worksheet time: 44mins

Name
Class
Date
1.

A simple cell contains two different metals called ________, separated by a liquid or paste called an ________.

a)

electrodes, electrolyte

b)

cathodes, anode

c)

conductors, insulator

d)

plates, solution

2.

In a simple cell, negatively-charged electrons flow from the less reactive metal to the more reactive metal.

a)

True

b)

False

3.

Which of the following best describes an electrolyte?

a)

A type of metal

b)

A liquid or paste that separates electrodes

c)

A wire

d)

A battery terminal

4.

What is a primary cell?

4 lines
5.

Fill in the blank: Primary cells are also known as ______ cells because there is no fluid inside them.

a)

dry

b)

wet

c)

liquid

d)

electrolyte

6.

Which of the following statements about secondary cells is correct?

a)

They have high internal resistance

b)

The chemical reaction is irreversible

c)

They are made of molten salts and wet cells

d)

They get discharged slowly

7.

Fill in the blank: The chemical reaction in secondary cells is ______.

a)

reversible

b)

irreversible

c)

spontaneous

d)

exothermic

8.

Refer to the diagram of the cell. Which part is labeled as the separator electrolyte?

a)

The left electrode

b)

The right electrode

c)

The central vertical section

d)

The liquid at the bottom

9.

In the diagram of the cylindrical cell, what is the function of the metal cap?

a)

It acts as the positive terminal of the cell.

b)

It insulates the cell from external contact.

c)

It stores chemical energy for the cell.

d)

It prevents leakage of electrolyte.

10.

In the diagram of the cylindrical cell, which part acts as the negative electrode?

a)

Zinc case

b)

Carbon rod

c)

Electrolyte paste

d)

Brass terminal

11.

In the diagram of the cylindrical cell, which part is labeled as the positive electrode?

a)

Carbon rod

b)

Zinc casing

c)

Separator

d)

Electrolyte

12.

In the diagram of the cylindrical cell, the purpose of the expansion space is:

a)

to allow for the expansion of internal materials during operation

b)

to store excess electrolyte

c)

to provide electrical insulation

d)

to increase the cell's voltage

13.

Which of the following is NOT a part labeled in the cylindrical cell diagram?

a)

Metal cap

b)

Expansion space

c)

Lead plates

d)

Manganese dioxide paste

14.

What type of battery is shown on the right side of the image?

a)

Car battery (lead-acid battery)

b)

Lithium-ion battery

c)

Nickel-cadmium battery

d)

Alkaline battery

15.

Which type of cell has high energy density (cell capacity)?

a)

Primary cell

b)

Secondary cell

16.

Which type of cell can be discharged slightly more quickly (higher output power capacity)?

a)

Primary cell

b)

Secondary cell

17.

Which type of cell has low internal resistance?

a)

Primary cell

b)

Secondary cell

18.

Which type of cell has an irreversible chemical reaction?

a)

Primary cell

b)

Secondary cell

19.

Fill in the blank: Initial cost is high for __________.

a)

Secondary cell

b)

Primary cell

c)

Resistor

d)

Capacitor

20.

What are the charged particles found in ionic substances called?

a)

Atoms

b)

Molecules

c)

Ions

d)

Electrons

21.

Fill in the blank: Lead bromide contains positively charged ______ ions and negatively charged bromide ions.

a)

lead

b)

sodium

c)

potassium

d)

calcium

22.

Which electrode is connected to the positive terminal of the battery?

a)

Zn Electrode

b)

Cu Electrode

c)

Both electrodes

d)

Neither electrode

23.

What is an electrolyte?

a)

A covalently bonded substance that contains neutral atoms

b)

An ionically bonded substance that is either molten or dissolved in water so that the ions are free to move when a current is passed through it

c)

A solid metal

d)

A gas

24.

Fill in the blank: Covalently bonded compounds cannot act as ________ because they contain neutral atoms.

a)

electrolytes

b)

solvents

c)

catalysts

d)

oxidizers

25.

During electrolysis, positively charged ions (cations) move to which electrode?

a)

Positive electrode (anode)

b)

Negative electrode (cathode)

c)

Both electrodes

d)

They do not move

26.

During electrolysis, negatively charged ions (anions) move to the ________ electrode (anode).

a)

positive

b)

negative

c)

neutral

d)

grounded

27.

The cations and anions move through the electrolyte during electrolysis.

a)

True

b)

False

28.

What is electroplating? Electroplating is an electrolytic process in which a metal is _______ from an electrode and deposited over a metallic or non-metallic surface.

a)

disassociated

b)

oxidized

c)

evaporated

d)

dissolved

29.

What is the main purpose of electroplating?

a)

To increase the weight of metals

b)

To protect metals from corrosion by atmospheric air and moisture

c)

To make metals magnetic

d)

To change the color of metals

30.

Refer to the diagram of electroplating with copper. Which electrode is connected to the positive terminal of the battery?

a)

Key

b)

Copper electrode

c)

Copper sulphate

d)

Battery

31.

In the electroplating process shown, what is the electrolyte used?

a)

Copper sulphate

b)

Sodium chloride

c)

Potassium nitrate

d)

Zinc sulphate

32.

What is the process of deposition of an oxide film on a metal surface by electrolysis called?

a)

Galvanising

b)

Anodising

c)

Plating

d)

Painting

33.

Anodising is mainly used to increase the thickness of the natural ______ layer on the surface of metallic parts.

a)

oxide

b)

sulfide

c)

chloride

d)

nitrate

34.

What does galvanic cathodic protection involve?

4 lines
35.

The coating used in galvanic protection is called the ________ or sacrificial anode.

a)

galvanic

b)

cathodic

c)

electrolytic

d)

passive

36.

The zinc layer in galvanized steel acts to cathodically protect steel against corrosion.

a)

True

b)

False

37.

Which metal is commonly used to galvanize steel?

a)

Copper

b)

Zinc

c)

Aluminum

d)

Iron

38.

What is produced when acids react with some metals?

a)

Salt and hydrogen gas

b)

Water and oxygen gas

c)

Salt and carbon dioxide

d)

Water and hydrogen gas

39.

Fill in the blank: The general reaction between a metal and an acid can be written as ________.

a)

metal + acid → salt + hydrogen

b)

metal + acid → water + oxygen

c)

metal + acid → metal oxide + hydrogen

d)

metal + acid → salt + carbon dioxide

40.

What happens to a metal when it is put into acid?

a)

It gets larger

b)

It gets smaller as it is used up during the chemical reaction

c)

It changes color

d)

It melts

41.

What are the bubbles of gas seen when a metal reacts with acid?

a)

Oxygen gas

b)

Carbon dioxide

c)

Hydrogen gas

d)

Nitrogen gas

42.

Which of the following metals is very reactive and easily takes part in chemical reactions?

a)

Gold

b)

Potassium

c)

Silver

d)

Copper

43.

Which of the following metals is very unreactive and does not easily take part in chemical reactions?

a)

Potassium

b)

Gold

c)

Iron

d)

Zinc

44.

According to the reactivity series shown, which of the following metals are the most reactive?

a)

A) Iron, Zinc

b)

B) Sodium, Potassium

c)

C) Copper, Silver

d)

D) Tin, Lead

45.

According to the reactivity series shown, which group of metals is the least reactive?

a)

Magnesium, Aluminum

b)

Calcium

c)

Copper, Silver, Gold, Platinum

d)

Tin, Lead

46.

Fill in the blank: In the reactivity series, ________ and ________ are more reactive than Iron and Zinc.

a)

Magnesium, Aluminum

b)

Copper, Silver

c)

Lead, Gold

d)

Nickel, Tin

47.

Which of the following metals is more reactive than Tin and Lead but less reactive than Calcium?

a)

Iron

b)

Gold

c)

Potassium

d)

Lead

48.

Fill in the blank: According to the reactivity series, ________ is less reactive than Magnesium and Aluminum but more reactive than Tin and Lead.

a)

Iron, Zinc

b)

Copper, Silver

c)

Gold, Platinum

d)

Tin, Lead

49.

What is the reaction of Potassium with dilute acids?

a)

Violent reaction

b)

No reaction

c)

Slow reaction

d)

Mild reaction

50.

What is the reaction of Sodium with dilute acids?

a)

Violent reaction

b)

No reaction

c)

Slow reaction

d)

Mild reaction

51.

What is the reaction of Calcium with dilute acids?

a)

Rapid bubbling

b)

No reaction

c)

Formation of a precipitate

d)

Slow color change

52.

What is the reaction of Magnesium with dilute acids?

a)

Rapid bubbling

b)

No reaction

c)

Slow color change

d)

Formation of a precipitate

e)

Release of a pungent smell

53.

What is the reaction of Aluminum with dilute acids?

a)

Rapid bubbling with a slow start

b)

No reaction at all

c)

Immediate vigorous explosion

d)

Formation of a white precipitate

54.

What is the reaction of Zinc with dilute acids?

a)

Rapid bubbling

b)

No reaction

c)

Formation of a green precipitate

d)

Emission of a foul smell

55.

What is the reaction of Iron with dilute acids?

a)

Slow bubbling

b)

No reaction

c)

Rapid explosion

d)

Formation of green gas

e)

Iron melts

56.

What is the reaction of Tin with dilute acids?

a)

Slow bubbling

b)

Rapid fizzing

c)

No reaction

d)

Formation of a precipitate

57.

What is the reaction of Lead with dilute acids?

a)

Very slow bubbling

b)

Rapid effervescence

c)

No reaction at all

d)

Formation of a white precipitate

58.

What is the reaction of Copper with dilute acids?

a)

No reaction

b)

Copper dissolves and forms a blue solution

c)

Copper reacts vigorously producing hydrogen gas

d)

Copper turns into a black powder

59.

What is the reaction of Silver with dilute acids?

a)

No reaction

b)

Silver dissolves forming silver nitrate

c)

Silver reacts vigorously producing hydrogen gas

d)

Silver forms a precipitate with the acid

60.

What is the reaction of Gold with dilute acids?

a)

No reaction

b)

Gold dissolves forming gold chloride

c)

Gold reacts vigorously producing hydrogen gas

d)

Gold forms a precipitate with acid

61.

What is the reaction of Platinum with dilute acids?

a)

No reaction

b)

Forms platinum chloride

c)

Releases hydrogen gas

d)

Forms platinum sulfate

62.

What is an alloy?

a)

A pure metal

b)

A mixture of two or more metals

c)

A type of acid

d)

A type of alkali

63.

Whether an alloy reacts with an acid or alkali depends on what the alloy is made of.

a)

True

b)

False

64.

If the alloy mixture contains an element that is more reactive than the other element within the alloy, then the reaction would be less vigorous compared with that of a single element.

a)

True

b)

False

65.

Which of the following is NOT an example of an alloy?

a)

Brass

b)

Bronze

c)

Stainless steel

d)

Pure gold

66.

Identify the alloy shown in the image.

a)

Titanium alloy

b)

Brass

c)

Bronze

d)

Stainless steel

67.

High risk operations: Being aware of how metals react with acids and alkalis is important. Many metals are corroded by acids because they react with them to produce which gas?

a)

Oxygen

b)

Nitrogen

c)

Hydrogen

d)

Carbon dioxide

68.

Name one factor that determines whether a reaction between a metal and an acid or alkali will occur.

a)

the acid / the metal / whether the acid or alkali is concentrated or dilute

b)

the temperature of the room

c)

the color of the metal

d)

the shape of the container

69.

High risk operations: The hydrogen produced during the reaction between a metal and an acid is lighter than air and is likely to produce a flammable/explosive atmosphere in a confined space.

a)

True

b)

False

70.

Fill in the blank: ________ can be used to improve aesthetics or reduce corrosion in engineering.

a)

Electroplating

b)

Welding

c)

Casting

d)

Forging

71.

Fill in the blank: ________ can be used to protect metal parts from corrosion in engineering.

a)

Galvanic protection

b)

Electroplating

c)

Painting

d)

Lubrication

72.

Fill in the blank: ________ by reaction with acids or alkalis is used to make markings or create features on metal surfaces by reacting away unwanted material.

a)

Chemical etching

b)

Electroplating

c)

Anodizing

d)

Galvanizing

73.

What is chemical etching used for on a circuit board?

a)

To make copper traces to connect different components

b)

To paint the board

c)

To add insulation

d)

To solder components

74.

Chemical etching is used to change the texture of a surface. Which of the following is NOT a reason for using chemical etching?

a)

A) To increase the roughness of a surface (for aesthetics or grip)

b)

B) To improve the effectiveness of bonding

c)

C) To facilitate the retention of oils and lubricants

d)

D) To make a surface less rough to reduce friction and lubrication requirements

75.

Fill in the blank: Chemical etching can be used to increase the _______ of a surface for aesthetics or grip.

a)

roughness

b)

temperature

c)

color

d)

weight

76.

Fill in the blank: Chemical etching can improve the effectiveness of _______.

a)

bonding

b)

painting

c)

insulation

d)

lubrication

77.

Fill in the blank: Chemical etching can facilitate the retention of oils and _______.

a)

lubricants

b)

acids

c)

solvents

d)

salts

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