NEW
Font size
WorksheetsElectrical Components Quiz PART 1
Total questions: 38
Worksheet time: 19mins
What is the correct order of components through which electricity flows from the incoming supply to the appliances/circuits according to the diagram?
Meter, Supplier's fuse, Consumer unit, Appliances/circuits
Supplier's fuse, Meter, Appliances/circuits, Consumer unit
Incoming supply, Supplier's fuse, Meter, Consumer unit, Appliances/circuits
Appliances/circuits, Consumer unit, Meter, Supplier's fuse, Incoming supply
What component is directly connected to the meter in the electrical components diagram?
Main earth bar
Supplier's fuse
Consumer unit
Extraneous metallic pipework such as CH systems
According to the diagram, what is connected to the external metallic pipework systems?
Main electrical supply
Consumer unit
Main earth bar
Meter
Which of the following materials is a good conductor of electricity?
Rubber
Plastic
Copper
Glass
What is the primary function of insulators in electrical components?
To allow electricity to flow
To protect the consumer from electric shocks
To generate electricity
To store electricity
Which of the following is not an insulator?
Rubber
Silver
Plastic
Glass
What is the purpose of a cable in electrical components according to the document?
To connect appliances to power sources
To hard-wire properties, generally unseen, behind walls and under floors
To transmit data between devices
To insulate electrical components
What does a 1.5mm twin and earth cable correspond to?
Ring main
Larger electric showers (11kW)
Lighting
Smaller electric shower (7kW)
Which color represents the neutral wire in the document?
Blue
Brown
Green
Yellow
What is the color of the live wire as per the document?
Blue
Brown
Green
Yellow
What is the significance of the central core's color in the document?
It indicates a neutral wire
It signifies a live wire
It needs sleeving for protection and is known as Circuit Protective Conductor CPC
It is used exclusively for data transmission
What is the purpose of flex as mentioned in the document?
To insulate the earth wire
To prevent overheating
To connect electrical components
To be used for extension cables and leads for appliances above floor level
Which cable size is suitable for lights according to the document?
0.5mm
0.75mm
1.0mm
1.5mm
What is the wattage rating for a 1.5mm cable?
700w
1400w
2400w
3600w
Which appliance is associated with a 2.5mm cable?
Lights
Kettle/immersion
Central heating
Commercial
What is the significance of the correct selection of flex?
To ensure proper color coding
To prevent overheating
To reduce costs
To improve flexibility
What is the primary use of armoured cable as mentioned in the text?
To connect portable devices
To supply power to an outhouse
For interior lighting circuits
To link computer networks
What additional protection does the metal armour of an armoured cable offer?
Electrical insulation
Waterproofing
Additional mechanical protection
Fire resistance
According to the text, is armoured cable commonly used by plumbers?
Yes, it is commonly used by plumbers
No, it is not something that plumbers will generally come across
Yes, specifically for plumbing mains
No, it is only used by electricians
What is the capacity in amps for a twin and earth (CPC) cable with a cross section of 1.5mm?
11A
14A
18A
25A
What is the recommended fuse amps for a domestic lighting circuit?
6-10
16-20
30-32
45
What is the capacity in amps for a twin and earth (CPC) cable with a cross section of 10mm?
32A
43A
25A
18A
What is the recommended fuse amps for a cooker?
6-10
16-20
30-32
45
What can happen if an undersized cable is used for a circuit or an appliance?
The cable can become more flexible.
The cable can go brown.
The cable can improve in efficiency.
The cable can become waterproof.
What is a possible consequence of a cable going brittle due to being undersized?
It can enhance the insulation.
It can damage the insulation.
It can make the insulation transparent.
It can turn the insulation into a conductor.
What is the first item that gets damaged generally when an incorrect, undersized cable is used?
The appliance itself.
The circuit breaker.
The insulation.
The plug.
What is the very thing that keeps people safe, which gets damaged when using an incorrect, undersized cable?
The copper wire.
The grounding system.
The insulation.
The outer sheath.
What severe risk can arise from the use of an incorrect, undersized cable?
A power surge can occur.
A blackout can occur.
A fire can start.
An electromagnetic field can be generated.
What is the use of heat resistant flex?
For outdoor lighting
For heat producing appliances like kettles, irons, and immersion heaters
For refrigeration systems
For digital devices
What is the usual rating of an immersion heater that would require a 1.5mm butyl heat resistant flex?
1.0-1.5kW
2.5-3.0kW
3.5-4.0kW
4.5-5.0kW
Up to what temperature can the heat resistant flex be heated without being damaged?
75°C
85°C
95°C
105°C
Why should an immersion heater not be connected to the ring circuit?
It can cause electrical interference with other devices.
It will increase the electricity bill significantly.
It will effectively deprive the main of half its potential capacity.
It is easier to install on a different type of circuit.
What type of isolator should be used to protect an immersion heater?
Single pole isolator
Double pole isolator
Triple pole isolator
No isolator is needed
How close should the isolator be fixed to the heater?
Within 0.5m of the heater
Within 1.5m of the heater
Within 2.5m of the heater
Within 3.5m of the heater
What should be the amp rating of the isolator for an immersion heater?
10 amp
15 amp
20 amp
25 amp
What type of cable is recommended for an immersion heater installation?
1.5mm butyl heat resistant cable
2.5mm PVC insulated cable
1.0mm cross-linked polyethylene cable
2.0mm rubber insulated cable
What is the purpose of the neon indicator in the immersion heater setup?
To indicate that the heater is turned off
To indicate that the heater is turned on
To show the temperature of the water
To display the power consumption
What is the amp rating of the MCB at the consumer unit for an immersion heater?
10 amp
16 amp
20 amp
25 amp
