Evaluating Electrical Systems: Enhance Safety and Efficiency

Question 1

What part of an electrical circuit allows current to flow?

Accepted Answer

Wire

Answer

Fuse

Answer

Switch

Answer

Insulator

Question 2

Which of the following is a good practice for electrical safety?

Accepted Answer

Inspecting cords and plugs regularly

Answer

Using electrical equipment in wet areas

Answer

Overloading electrical outlets

Answer

Touching electrical wires with bare hands

Question 3

What is the unit of electrical power?

Accepted Answer

Watt

Answer

Volt

Answer

Ohm

Answer

Ampere

Question 4

What is the purpose of grounding in an electrical system?

Accepted Answer

To provide a safe path for excess electricity to flow

Answer

To increase the voltage of the system

Answer

To reduce the resistance of the system

Answer

To store electrical energy

Question 5

Which of these can make an electrical system work more efficiently?

Accepted Answer

Reducing resistance

Answer

Increasing voltage

Answer

Adding more components

Answer

Using materials with higher resistance

Question 6

Which of the following is **NOT** a potential hazard associated with electrical systems?

Accepted Answer

Chemical spill

Answer

Electric shock

Answer

Overheating

Answer

Fire

Question 7

What is the purpose of an earth wire?

Accepted Answer

To provide a safe path for excess electricity to flow to the ground

Answer

To carry the main electric current

Answer

To prevent electrical devices from overheating

Answer

To connect electrical devices to the power source

Question 8

What is the best way to test the continuity of an electrical circuit?

Accepted Answer

Using a multimeter

Answer

Connecting the circuit to a power source and observing if it powers on

Answer

Touching the bare wires with your fingers

Answer

Examining the circuit visually for any breaks

Question 9

What type of material is commonly used to insulate electrical wires?

Accepted Answer

Plastic

Answer

Metal

Answer

Fabric

Answer

Glass

Question 10

What is the purpose of a transformer in an electrical system?

Accepted Answer

To increase or decrease the voltage

Answer

To convert AC current to DC current

Answer

To store electrical energy

Answer

To protect the system from overloading

Question 11

What is the symbol for an electrical resistor?

Accepted Answer

|-----|

Answer

|---->|

Answer

|-----<|

Answer

|---><|

Question 12

Which of these materials is the best at letting electricity flow through it?

Accepted Answer

Copper

Answer

Wood

Answer

Rubber

Answer

Plastic

Question 13

What do we call the special unit that measures electrical current?

Accepted Answer

Ampere

Answer

Volt

Answer

Ohm

Answer

Coulomb

Question 14

In an electrical system, which of these could be a potential hazard?

Accepted Answer

Loose wires

Answer

Bright lights

Answer

Clean switches

Answer

Smooth surfaces

Question 15

Which of these materials is a good conductor of electricity?

Accepted Answer

Copper

Answer

Wood

Answer

Rubber

Answer

Glass

Question 16

What is the unit used to measure electrical current called?

Accepted Answer

Amperes

Answer

Volts

Answer

Watts

Answer

Ohms

Question 17

What should you do if you find a faulty electrical appliance?

Accepted Answer

Unplug it and tell an adult.

Answer

Try to fix it yourself.

Answer

Use it anyway.

Answer

Throw it away.

Question 18

What is the main purpose of using insulation in an electrical system?

Accepted Answer

To prevent electrical shocks.

Answer

To increase the flow of electricity.

Answer

To store electrical energy.

Answer

To regulate the voltage.

Question 19

When evaluating the effectiveness of an electrical system, what is the first step?

Accepted Answer

Checking for hazards.

Answer

Measuring the current.

Answer

Testing the voltage.

Answer

Replacing the wires.

Question 20

Which device do we use to measure the electrical resistance in a circuit?

Accepted Answer

Ohmmeter

Answer

Voltmeter

Answer

Ammeter

Answer

Multimeter

Question 21

What is the purpose of grounding in an electrical system?

Accepted Answer

To provide a safe path for excess electricity.

Answer

To increase the flow of electricity.

Answer

To store electrical energy.

Answer

To regulate the voltage.

Question 22

Which of these is NOT a danger that can come from electrical systems?

Accepted Answer

Water damage

Answer

Fire

Answer

Electric shock

Answer

Explosion

Question 23

What is the purpose of a fuse in an electrical circuit?

Accepted Answer

To protect the circuit from too much current

Answer

To control the flow of electricity

Answer

To store electrical energy

Answer

To connect different parts of the circuit

Question 24

Which of these materials is a good conductor of electricity?

Accepted Answer

Metal

Answer

Plastic

Answer

Wood

Answer

Rubber

Question 25

Which of these is an example of an insulator?

Accepted Answer

Plastic

Answer

Copper wire

Answer

Iron nail

Answer

Saltwater

Question 26

What is the purpose of an ammeter?

Accepted Answer

To measure current

Answer

To measure voltage

Answer

To measure resistance

Answer

To measure power

Question 27

What is the unit of measurement for electrical current?

Accepted Answer

Ampere

Answer

Volt

Answer

Ohm

Answer

Watt

Question 28

What is the purpose of a capacitor in an electrical circuit?

Accepted Answer

To store electrical energy

Answer

To regulate the flow of electricity

Answer

To protect the circuit from too much current

Answer

To connect different parts of the circuit

Question 29

Which of these situations is NOT a potential hazard in an electrical system?

Accepted Answer

Dropping a book on the circuit

Answer

Wires or cables overheating

Answer

Electric shock

Answer

Explosion

Question 30

What is the main purpose of an earth wire in an electrical system?

Accepted Answer

To prevent electric shock

Answer

To make sure the circuit is complete

Answer

To carry the electrical current

Answer

To store energy for the electrical devices

Question 31

Which of these is a type of electrical switch that turns a circuit on or off?

Accepted Answer

Toggle switch

Answer

Fuse

Answer

Circuit breaker

Answer

Resistor

Question 32

Which of these actions would make an electrical system more efficient?

Accepted Answer

Using LED bulbs instead of regular bulbs

Answer

Adding extra wires to the circuit

Answer

Using a bulb with a higher wattage

Answer

Leaving appliances turned on when not in use

Question 33

What is the key difference between a serial circuit and a parallel circuit?

Accepted Answer

In a serial circuit, the current has only one path to flow through, while in a parallel circuit, it has multiple paths.

Answer

In a parallel circuit, the current has only one path to flow through, while in a serial circuit, it has multiple paths.

Answer

Serial circuits use more energy than parallel circuits.

Answer

Parallel circuits use more energy than serial circuits.

Question 34

When designing an electrical system, which of these is a good practice?

Accepted Answer

Using wires with the correct thickness

Answer

Overloading the circuit with too many devices

Answer

Using wires that are damaged

Answer

Leaving electrical wires exposed without insulation

Question 35

What is the main function of a fuse in an electrical circuit?

Accepted Answer

To protect the circuit from damage caused by too much current flowing through it

Answer

To provide a path for the electrical current to flow

Answer

To store electrical energy

Answer

To regulate the voltage in the circuit

Question 36

Which of these actions could be part of a risk assessment for an electrical system?

Accepted Answer

Identifying potential hazards

Answer

Testing the electrical circuit with a multimeter

Answer

Installing a new electrical outlet

Answer

Fixing a broken wire

Question 37

What is the SI unit used to measure electrical resistance?

Accepted Answer

Ohm

Answer

Ampere

Answer

Volt

Answer

Watt

Question 38

Which of these is NOT a risk that comes with using electricity?

Accepted Answer

Feeling happy

Answer

Electric shocks

Answer

Catching fire

Answer

Tripping over wires

Question 39

Which material should NOT be used to cover electrical wires for safety?

Accepted Answer

Paper

Answer

Rubber

Answer

Plastic

Answer

Ceramic

Question 40

What's the difference between a circuit that's open and one that's closed?

Accepted Answer

Electricity can flow in a closed circuit but not in an open one.

Answer

Electricity can flow in an open circuit but not in a closed one.

Answer

Open circuits are better at saving energy than closed circuits.

Answer

Closed circuits are better at saving energy than open circuits.

Question 41

Why is earthing used in electrical systems?

Accepted Answer

To provide a safe path for excess electricity to flow in case of a problem

Answer

To improve how well the system works

Answer

To control the voltage in the system

Answer

To store energy

Question 42

Which tool do we use to measure electrical current?

Accepted Answer

Ammeter

Answer

Multimeter

Answer

Voltmeter

Answer

Wattmeter

Question 43

What unit do we use to measure electrical resistance?

Accepted Answer

Ohm

Answer

Volt

Answer

Ampere

Answer

Watt

Question 44

What is the main purpose of a fuse in an electrical circuit?

Accepted Answer

To protect the circuit from overloading by breaking the connection when too much current flows through it

Answer

To store electrical energy

Answer

To conduct electricity

Question 45

Which type of electrical circuit allows electricity to flow in only one direction?

Accepted Answer

Series circuit

Answer

Parallel circuit

Answer

Star circuit

Question 46

What is the role of an insulator in an electrical system?

Accepted Answer

To prevent the flow of electric current

Answer

To control the flow of electric current

Answer

To conduct electricity

Question 47

What electrical property is measured in amperes?

Accepted Answer

Current

Answer

Resistance

Answer

Voltage

Question 48

What is the main purpose of a multimeter in electrical testing?

Accepted Answer

To measure electrical quantities like voltage, current, and resistance

Answer

To generate electricity

Question 49

Which of the following is NOT an advantage of using energy-efficient electrical appliances?

Accepted Answer

Increased energy bills

Answer

Lower carbon footprint

Answer

Reduced operating costs

Question 50

What is the difference between an electrical fault and an electrical hazard?

Accepted Answer

A fault is a defect in the system, while a hazard is a potential danger resulting from the fault

Answer

Hazards are major problems, while faults are minor issues

Answer

Hazards are always caused by natural events, while faults are always caused by human error