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Electrical Technology Year 8

Total questions: 180

Worksheet time: 2hrs 24mins

Name
Class
Date
1.

A small component that lights up

when current flows through it.

a)

resistor

b)

capacitor

c)

circuit

d)

light-emitting diode

2.

To use an LED, you need to connect it in a circuit with a...

a)

resistor

b)

capacitor

c)

transistor

d)

inductor

3.

You use it to control the voltages and the currents in your circuit.

a)

capacitor

b)

LED

c)

switch

d)

resistor

4.

To find the necessary resistor value we use...

a)

Thales theorem

b)

Ohm's law

c)

Pythagorean theorem

d)

Kirchhoff law

5.

This is a

a)

Resistor

b)

Capacitor

c)

Diode

d)

Battery

6.

This is a

a)

Resistor

b)

Battery

c)

Inductor

d)

Diode

7.

This is a

a)

Resistor

b)

Switch

c)

Relay

d)

Transistor

8.

These are

a)

Inductors

b)

Resistors

c)

Capacitors

d)

Leds

9.

There are

a)

transformers

b)

pushbutton

c)

relays

d)

switches

10.

This is a

a)

Motor

b)

Transformer

c)

Battery

d)

Buzzer

11.

This is a

a)

Oscilloscope

b)

Screwdriver

c)

Multimeter

d)

Milimeter

12.

What is in the picture?

a)

Fuse

b)

Switch

c)

Integrated Circuit

d)

Light Emitting Diodes (LED)

13.

The image is the symbol for a:

a)

LED

b)

resistor

c)

diode

d)

conductor

14.

Select the correct symbol for a battery.

a)
b)
c)
d)
15.
a)
b)
c)
d)
16.
a)
b)
c)
d)
17.
a)
b)
c)
d)
18.
a)
b)
c)
d)
19.

The image is a symbol for a:

a)

diode

b)

LED

c)

source

d)

photocell

20.

The following is a symbol for a:

a)

LED

b)

photocell

c)

diode

d)

source

21.

Name this component

a)

Cell

b)

diode

c)

push switch

d)

microphone

22.

Name this output device

a)

Lamp

b)

LED

c)

Buzzer

d)

Heater

23.

Name this output device

a)

Speaker

b)

LED

c)

Buzzer

d)

lamp

24.

What is this?

a)

Diode

b)

Resistor

c)

Battery

d)

Cell

25.

Name this output device

a)

Motor

b)

Metro

c)

magnetometer

d)

MacDonalds

26.

What is this?

a)

Voltemort

b)

Valve

c)

Voltmeter

d)

Ammeter

27.

What is this?

a)

Ameter

b)

Ampmeter

c)

Ammeter

d)

Ampimeter

28.

What is the resistance provided by this resistor?

a)

47 ohms

b)

470 ohms

c)

4700 ohms

d)

472 ohms

29.

What does the color coding on a resistor indicate?

a)

The manufacturer

b)

The resistance value

c)

The voltage rating

d)

The power rating

30.

A process in which two or more

metal are joined together by melting

and by flowing a filler metal into the

joint.

a)

Transistor

b)

Soldering

c)

Capacitor

d)

Resistor

e)

Inductor

31.

A soft metal that is usually made of lead or tin.

a)

Active Devices

b)

Crimping

c)

Light Emitting Diose

d)

Solder

32.

What is the new symbol for resistor?

a)
b)
c)
d)
33.

What transducer converts electrical energy to sound?

a)

buzzer

b)

microphone

c)

amplifier

d)

oscilloscope

34.

What transducer converts electrical energy to heat?

a)

motor

b)

heater

c)

buzzer

d)

solar cell

35.

What is the unit of measurement for resistance?

a)

watt

b)

ampere

c)

ohm

d)

volt

36.

These are examples of

a)

Insulators

b)

Conductors

37.

___________________ are materials that ALLOW heat and electricity to move easily through them.

a)

Conductors

b)

Insulators

38.

Plastic is a great conductor of heat so it flows quicker.

a)

True

b)

False

39.
Why are metals useful for making electrical wire?
a)
Metals do not bend.
b)
Metals hold much heat.
c)
Metals are insulators.
d)
Metals are conductors.
40.
Which is NOT an insulator.
a)
Wool
b)
Plastic
c)
Copper
d)
Glass
41.

Which one is a series circuit?

a)
b)
c)
d)
42.
Which electrical component does the diagram represent?
a)
Wire
b)
Open switch
c)
Closed Switch
d)
Battery
43.

What does soldering do?

a)

joins metal for electrical connections

b)

Melts metal to turn to liquid

c)

tracks the sun

44.

What is this?

a)

soldering iron

b)

solder

c)

chip wick

d)

flux

45.

What is this?

a)

soldering iron

b)

solder

c)

chip wick

d)

flux

46.

What is the difference between stranded and solid wire?

a)

Solid wire is made of multiple strands joined together

b)

Solid wire is used as a passage of waters for protection and insulation

c)

Stranded wire is made of single strand of copper or aluminum wire

d)

Stranded wire is used for temporary wiring installation

47.

What is the name of this kind of Plier?

a)

Long Nose Plier

b)

Side Cutting Plier

c)

Combination Plier

d)

Crocodile Plier

48.

Which of the following is a Side/ Diagonal Cutting Plier?

a)
b)
c)
d)
49.

What Kind of Wire is this?

a)

Stranded Wires

b)

Colorful Wires

c)

Solid Wires

d)

Semi-Stranded Wires

50.

What is a circuit diagram?

a)

A written explanation of how circuits work

b)

A list of circuit components without symbols

c)

A detailed description of each circuit component

d)

A drawing of a circuit using symbols for components

51.
this circuit is .....?
a)
open
b)
parallel
c)
closed
d)
The cutest little circuit evah!
52.

It opens or close the electric circuit.

a)

switch

b)

light bulb

c)

wire

d)

battery

53.

Which arrangement has brighter bulbs?

a)
b)
54.

What is an alloy ?

a)

An alloy is a mixture of two or more metals,

b)
An alloy is a type of fabric used in clothing production.
c)
An alloy is a type of musical instrument.
d)
An alloy is a type of plant species.
55.

What is solder made from ?

a)
Copper and zinc
b)
Lead and tin
c)
Aluminum and iron
d)
Gold and silver
56.

What is the purpose of flux ?

a)
To increase the weight of the metal
b)
To reduce the melting point of the metal
c)
To improve the color of the metal
d)
To remove oxides, impurities, or unwanted materials from the metal surface
57.

At what temperatures does solder melt ?

a)

180°C to 190°C

b)

150°C to 160°C

c)

220°C to 230°C

d)

100°C to 110°C

58.

Current is measured in ?

a)
Ohms
b)
Volts
c)
Watts
d)

Amperes

59.

Resistance is measured in ?

(a)  

60.

Open the Circuit board simulation site at this location
https://phet.colorado.edu/sims/html/circuit-construction-kit-dc/latest/circuit-construction-kit-dc_all.html

1.) Create the circuit as shown in the diagram.

2.) Ensure all the Resistance and Battery values are as shown.

Question : What is the voltage between the Bulb ?

(a)  

61.

Click this Link : https://phet.colorado.edu/sims/html/circuit-construction-kit-dc/latest/circuit-construction-kit-dc_all.html

What will happen if the second switch (see Red Arrow) is closed ?

(a)  

62.

Which element do Ferrous metals contain?

a)

Iron

b)

Copper

c)

Lead

d)

Gold

63.
Which two of the following metals will be attracted to a magnet?
a)
Copper
b)
Brass
c)
Mild Steel
d)
Cast Iron
e)
Aluminium
64.
Which term is given to a material that is a mixture of two or more metals or elements?
a)
Alloy
b)
Ferrous
c)
Ductile
d)
Blend
65.
Which 3 material properties are most associated with metals?
a)
Hardness
b)
Malleability
c)
Ductility
d)
Elasticity
e)
Electrical Insulator
66.
Which of the following ferrous metals has the highest carbon content?
a)
Mild Steel
b)
Stainless Steel
c)
Cast Iron
67.
Which of the following non-ferrous metals has the lowest melting point?
a)
Aluminium
b)
Copper
c)
Brass
68.
Brass is an alloy of which two elements?
a)
Copper
b)
Zinc
c)
Iron
d)
Gold
e)
Chromium
69.
Which of the following non ferrous metals would be classed as an alloy?
a)
Copper
b)
Aluminium
c)
Brass
d)
Tin
e)
Zinc
70.
Which two changes would occur to mild steel if you were to increase the carbon content?
a)
It would become softer
b)
It would become harder
c)
It would become more brittle
d)
It would become tougher
71.

Which metal is commonly used in the manufacture of drinks cans?

a)

Aluminium

b)

Copper

c)

Brass

d)

Mild Steel

e)

Stainless Steel

72.

Which metal is commonly used in the manufacture of cutlery?

a)

Aluminium

b)

Cast iron

c)

Brass

d)

Mild Steel

e)

Stainless Steel

73.

Tin is one of the non ferrous metal

a)

True

b)

False

74.
What does ferrous mean?
a)
It has iron in it
b)
It doesn’t have iron in it
c)
It is magnetic
d)
It is heavy
75.
Which of these metal is ferrous?
a)
Steel 
b)
Copper
c)
Lead
d)
tin
76.
Aluminum is attracted to a magnet.
a)
True
b)
False
77.
Stainless steel is magnetic.
a)
True
b)
False
78.
a brittle material is one that
a)
will bend
b)
fractures under presure
c)
can be crushed easilly
79.
1. Define an 'Alloy'
a)
a) A mixture of non-metallic elements
b)
b) A mixture of metallic elements
c)
c) A mixture of non-metal and metal elements
d)
d) A compound of non-metal and metal elements
80.

Which element do Ferrous metals contain?

a)

Iron

b)

Copper

c)

Lead

d)

Gold

81.

What is the primary characteristic of non-ferrous metals?

a)

Contain high quantities of iron

b)

Contain no iron or only very small quantities

c)

Are always magnetic

d)

Have low electrical conductivity

82.

An alloy Copper and Zinc is known as...

a)

Brass

b)

Bronze

c)

Zinc

d)

Tin

83.

What does non-ferrous mean?

a)

Contains iron, is magnetic

b)

Does not contain iron, is not magnetic

c)

Contains ferrite, is magnetic

d)

Does not contain ferrite, is not magnetic

84.

What non-ferrous metal is an excellent conductor of electricity?

a)

Copper

b)

Solder

c)

Brass

d)

Wire

85.

What types of metals are magnetic?

a)

Ferrous

b)

Ferrite

c)

Non-ferrous

d)

Non-ferrite

86.

What metal is commonly used for making kitchen sinks?

a)

Stainless steel

b)

Stainless steal

c)

Sinless sinew

d)

Steinless stihl

87.

What does this image represent?

a)

A pulley

b)

A wedge

c)

A lever

d)

A wheel and axle

88.

A pulley is an example of a:

a)

Simple Machine

b)

Book

c)

Science Tool

d)

Test Taking Strategy

89.

The picture showing the energy conversion

Chemical → heat

is:

a)
b)
c)
d)
90.

The picture showing the energy conversion

Chemical → kinetic

is:

a)
b)
c)
d)
91.

The picture showing the energy conversion

Electrical → light

is:

a)
b)
c)
d)
92.

What type of energy conversion takes place in a toaster?

a)

Electrical to Chemical

b)

Electrical to Thermal

c)

Chemical to Radiant

d)

Thermal to Chemical

93.

What is the energy conversion when you plug in a stereo and listen to music?

a)

electrical to mechanical

b)

chemical to heat

c)

electrical to sound

d)

potential to sound

94.

What is the energy conversion when you put batteries in a flashlight to make it turn on?

a)

chemical to light

b)

light to kinetic

c)

chemical to thermal

d)

nuclear to light

95.

What energy conversion is taking place in this picture?

a)

solar energy to thermal energy

b)

thermal energy to chemical energy

c)

chemical energy to thermal and light energy

96.

This toy changes rotational motion to what?

a)

Oscillating

b)

Reciprocating

c)

Linear

97.

An arrow uses what kind of motion?

a)

Linear

b)

Reciprocating

c)

Oscillating

d)

Rotating

98.

A metronome uses what kind of motion?

a)

Linear

b)

Reciprocating

c)

Oscillating

d)

Rotating

99.

What motion is this?

a)

Reciprocating

b)

Linear

c)

Rotary

d)

Oscillating

100.

What motion do the wheels make?

a)

Reciprocating

b)

Oscillating

c)

Linear

d)

Rotary

101.

What motion is the pendulum making?

a)

Rotary

b)

Reciprocating

c)

Linear

d)

Oscillating

102.

What motion is the see-saw making?

a)

Reciprocating

b)

Oscillating

c)

Linear

d)

Rotary

103.

Where on a bicycle might you find a pulley?

a)

the gears

b)

the handlebars

c)

the seat

d)

the tires

104.

Let's say you wanted to use a pulley to lift a flag up a flagpole. If you wanted to lift the flag 10 meters in the air, how far would you have to move the rope?

a)

5 meters

b)

10 meters

c)

15 meters

d)

20 meters

105.

A pulley contains which other simple machine?

a)

a screw

b)

an inclined plane

c)

a lever

d)

a wheel and axle

106.

What is the force exerted by the load being lifted called?

a)

the actual force

b)

the resistance force

c)

the effort force

d)

the strong force

107.

Let's say you had a pulley system with a mechanical advantage of 3. If you want to lift a boulder 10 meters off the ground, how far would you have to pull the rope?

a)

3 meters

b)

10 meters

c)

30 meters

d)

300 meters

108.

What unit is used to measure force?

a)

meter

b)

centimeter

c)

Newton

d)

gallon

109.

Identify the type of pulley

a)

Fixed

b)

Moveable

c)

Block and Tackle or pulley system

110.
What is happening at point F on the Product Life Cycle?
a)
Introduction
b)
Decline
c)
Maturity
d)
Growth
111.
The product life cycle shows the different stages that a product passes through and sales that can be expected at each stage
a)
True
b)
False
112.
Firms with a technically superior good may well engage in price skimming. This comment could apply to which stage of the Product Life Cycle?
a)
Introduction
b)
Growth
c)
Decline
d)
Maturity
113.
Costs are incurred e.g. building new production lines, promotion and distribution costs. Likely the product will still not be profitable. The length of this stage will vary.
a)
Maturity
b)
Growth
c)
Introduction
d)
Decline
114.
Which of these comments is most suitable for Growth?
a)
Heavy investment but no sales
b)
Sales are likely to be low as the product is new to the market
c)
Revenue is increasing as the product gains popularity
d)
Likely to be characterised as a dog in the Boston Matrix
115.
What happens to the cash flow of a business at the growth stage of the product life cycle?
a)
The cash flow should become more positive
b)
Cash flow is likely to be negative because money has to be spent on research and development
c)
Sales will fall and cash flow will drop
d)
There may be a need to spend money re-promoting the product. As a result, cash flow may begin to fall.
116.

Which one is NOT a stage in the PLC?

a)

maturity

b)

decline

c)

growth

d)

development

117.
Which of the following is a true statement about the introduction stage of the product life cycle:
a)
Profits are usually nonexistent.
b)
Costs are low.
c)
c. Sales growth is exploding.
d)
There is intense competition
118.
In Product Life Cycle stages, the stage in which sales and profits decrease is called
a)
Introduction
b)
Growth
c)
Maturity 
d)
Decline
119.

What is an ore?

a)

a solid metal

b)

a rock containing a metal combined with other elements, often oxygen

c)

an element

d)

an object used to row a boat

120.

Which element cannot be extracted from its ore by reduction with carbon?

a)

iron

b)

aluminium

c)

copper

d)

zinc

121.

A method of extracting the most reactive metals, like potassium or aluminium.

a)

carbon extraction

b)

fractional distillation

c)

electrolysis

d)

cracking

122.

What is the most commonly used metal in the world?

(a)  

123.
What is corrosion?
a)
The release of oxygen
b)
Breakdown of a metal
124.

Rusting is a _____________ process.

a)

Mechanical

b)

Chemical

c)

Physical

125.

two types of Noble metals

a)

gold and platinum

b)

iron and copper

c)

stainless steel and aluminum

d)

tin and brass

126.

(a)   a type of rock containing metal

127.

(a)   is a metal that does not contain iron

128.

Which diagram shows the most favourable conditions for rust to appear on the nail?

a)

A

b)

B

c)

C

d)

D

129.

Which of the following statements below is true?

a)

Copper is more ductile than brass

b)

Brass is more malleable than copper

c)

Iron is shinier than stainless steel

d)

Iron is more resistant to corrosion than steel

130.

Which of the following is not the aim of alloying?

a)

To increase the strength and hardness of metal.

b)

To prevent corrosion of metal.

c)

To improve the appearance of metal

d)

To increase the melting point.

131.

Name the tool;

a)

Scriber

b)

Scratcher

c)

Centre punch

d)

Bradawl

132.

Name the tool;

a)

Scriber

b)

Bradawl

c)

Pin punch

d)

Centre punch

133.

Name the tool;

a)

Compasses

b)

Dividers

c)

Separators

d)

Curvers

134.

(a)   is a metalworking machine that allows the bending of sheet metal.

135.

(a)   is used to mark the centre of a paint or hole before drilling.

136.

the drive system shown in the figure is

a)

belt drive

b)

chain drive

c)

gear drive

d)

sprocket drive

137.

The sprocket ratio of the chain drive shown below is

a)

0.5

b)

1.5

c)

1

d)

2

138.

Which gear represents the DRIVE gear?

a)

Small Gear

b)

Large Gear

139.

Which one is an example of a pulley system?

a)

an ax

b)

a ramp

c)

an elevator

d)

a see-saw

140.

A simple gear train is composed of three gears. Gear A is the driver and has 84 teeth, bear B has 60 teeth, and gear c has 20 teeth. If the output is gear C, what is the gear ratio?

a)

57\frac{5}{7}

b)

31\frac{3}{1}

c)

521\frac{5}{21}

141.

A simple gear train is composed of three gears. Gear A is the driver and has 84 teeth, bear B has 60 teeth, and gear c has 42 teeth. If gear C rotates at 60 rpm, how fast is gear a rotating?

a)

120 rpm

b)

30 rpm

c)

60 rpm

d)

90 rpm

142.

In a pulley system, pulley A is moving at 600 rpm and has a diameter of 12 in. Three pulleys B, C, and D, all of different sizes are attached to a single output shaft. Speed and torque output are changed within the system by moving the drive belt between pulleys B, C, and D. A speed of 1200 rpm is required when the drive belt is connected to pulley B. What is the diameter of pulley B?

a)

2

b)

4

c)

6

d)

8

143.

A mountain bike has a sprocket and chain drive system designed to adjust the force needed by an operator. The system consists of one sprocket driven by the pedals with a diameter of 10 inches, and a second on the back wheel with a diameter of 6.5 inches. What is the overall system gear ratio?

a)

1.54

b)

.64

144.

Velocity ratio of a belt drive is the ratio of speed of

a)

Driving pulley to driven pulley

b)

Driven pulley to driving pulley

145.

What is the answer?

a)

1:1

b)

2:1

c)

2:3

d)

4:1

146.
How much force would be needed to lift the 150 N weight? Remember, you need to divide the original force by the number of pulleys.
a)
300 N
b)
150 N
c)
75 N
d)
25 N
147.

In stepped or cone pulley drive

a)

Driving pulley rotates at constant speed

b)

Driven pulley rotates at constant speed

c)

Both rotates at same speed

148.

This type of drive is used to change the speed of the driven shaft while the driving shaft runs at constant speed

a)

Cone pulley drive

b)

cross belt drive

c)

open belt drive

149.

Name the small gear in the picture

a)

driven gear

b)

driver gear

c)

idler gear

150.

On the illustration, the number of the gear A teeth are 12, and the number of the gear B teeth are 48. Select one which shows correct gear ratio.

a)

25

b)

0.25

c)

4

151.

What can gears change about the motion (movement) of an object? (tick 3)

a)

speed

b)

force

c)

colour

d)

direction

152.

What does the term 'rpm' stand for?

a)

Rotation Per Minute

b)

Revolutions Per Minute

c)

Rendering Per Minute

d)

Repetition Per Minute

153.

What is the formula for Speed of a driven pulley

a)
Speed of driven pulley = (Speed of driver pulley + Radius of driver pulley) / Radius of driven pulley
b)
Speed of driven pulley = (Speed of driver pulley / Radius of driver pulley) * Radius of driven pulley
c)
Speed of driven pulley = (Speed of driver pulley * Radius of driver pulley) * Radius of driven pulley
d)
Speed of driven pulley = (Speed of driver pulley * Radius of driver pulley) / Radius of driven pulley
154.

Diameter of Driver Pulley = 12cm

Diameter of Driven Pulley = 96cm

Speed of the Driver pulley = 480rpm

What is the Speed of Driven Pulley ??

(a)  

155.

Diameter of Driver Pulley = 100cm

Diameter of Driven Pulley = 15cm

Speed of the Driver pulley = 0.3rpm

What is the Speed of Driven Pulley ??

(a)  

156.

Diameter of Driver Pulley = 12cm

Speed of Driven Pulley = 60rpm

Speed of the Driver pulley = 480rpm

What is the Diameter of Driven Pulley ??

(a)  

157.

What is the speed of the driven pulley if the speed of the driver pulley is 10rpm

(a)  

158.

What is the Driven pulley Speed if the driver pulley has 270rpm

(a)  

159.

Driver pulley has speed of 60rpm. what is the speed of the Driven pulley

(a)  

160.

Pulley A is the Driven Pulley with speed of 120rpm.

Pulley B is the Driver Pulley.

What is the speed of Pulley C ?

(a)  

161.

What is the meaning of the above hazard warning symbol?

a)

Corrosive

b)

Explosive

c)

Toxic

d)

Radioactive

162.

What does this warning symbol mean?

a)

Toxic

b)

Corrosive

c)

Flammable

d)

Irritant

163.

What does this warning symbol mean?

a)

Toxic

b)

Corrosive

c)

Flammable

d)

Irritant

164.

What does this warning symbol mean?

a)

Toxic

b)

Corrosive

c)

Flammable

d)

Irritant

165.

What hazard symbol is this?

a)

Irritant

b)

Harmful

c)

Corrosive

d)

Flammable

166.

What hazard symbol is this?

a)

Irritant

b)

Harmful

c)

Corrosive

d)

Flammable

167.

A toxic substance is poisonous if it enters your body.

a)
b)
c)
d)
168.

What does this symbol warn us about?

a)

Health hazard

b)

Lung disease

c)

Irritant

d)

Corrosive

169.

What does this symbol stand for?

a)

Flammable

b)

Oxidising

c)

Non-flammable

d)

Explosive

170.

This symbol tell us the chemical it is labelling is:

a)

Harmful to the environment

b)

Dangerous

c)

Toxic

d)

Poisonous

171.
Find the missing word:-
You must always wear an ............. in the work shop to protect your clothes.
a)
Safety Goggles
b)
Apron
c)
Heat resistant gloves
d)
Blazer
172.
Find the missing word:-
You must not wear ................. jewellery that could be caught in a machine.
a)
Tight
b)
hanging
c)
expensive
d)
gold
173.
Find the missing word:-
Ties should always be .................., and sleeves should be rolled up.
a)
tucked in
b)
placed in bags
c)
hanging out
d)
removed
174.
Find the missing word:-
No headphones or ..................... should be worn at anytime in the workshop.
a)
goggles
b)
aprons
c)
ties
d)
earphones
175.
You must never touch any tools or machinery which your teacher has not demonstrated or instructed you to use.
a)
True
b)
False
176.
Which of the following items must you always wear when using machines?
a)
Safety goggles
b)
Safety gloves
c)
Steel toecap boots
d)
Dust coat
177.
Find the missing word:-
You must always .........., not run  in the workshop.
a)
walk
b)
Sit
c)
dance
d)
jump
178.

Always get the instructor’s permission before ______________________.

a)

Entering the workshop

b)

Using the equipment

c)

All the above

179.

What type of lab safety signs uses yellow triangle with black writing?

a)

Mandatory

b)

Warning

c)

Prohibition

d)

Fire

180.

Never _________ someone that is operating a machine.

a)

Gloves

b)

Distract

c)

Brush

d)

Return

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