WorksheetsElectricity 1
Total questions: 20
Worksheet time: 10mins
What is the British Standard that offers guidance on the design, installation and testing of domestic electrical circuits?
BS 7671 (Requirements for Electrical Installations)
BS 1363 (Plugs and sockets)
BS 5839 (Fire detection and alarm systems)
BS 5266 (Emergency lighting)
What approved document covers the requirements for electrical installations?
Approved Document P (Electrical safety)
Approved Document L (Conservation of fuel and power)
Approved Document B (Fire safety)
Approved Document M (Access to and use of buildings)
A lighting circuit is normally installed by using what cross-sectional size of twin and earth cable?
0.5 mm²
1.0 mm²
1.5 mm²
2.5 mm²
What is the maximum current a standard UK 3‑pin socket/plug can take?
10 A
13 A
16 A
20 A
A standard domestic UK socket has what nominal voltage?
110 V
230 V
400 V
12 V
What does AC stand for in domestic electrical terms?
Alternating Current
Active Circuit
Absolute Charge
Average Current
To change 240 V into 110 V, what item needs to be used?
Transformer
Rectifier
Inverter
Capacitor
What size MCB is typically required for an immersion heater?
6 A
10 A
16 A
32 A
After the supplier’s fuse on an incoming domestic main, what item comes next?
Electricity meter
Consumer unit (distribution board)
RCD
Main earthing terminal
Under Part P, select the three bathroom danger zones that apply.
Kitchen
Bathroom
Lounge
Outhouse
Cupboard under the stairs
Where should permanent decommissioning be carried out?
At the point of supply (source)
At the appliance only
Anywhere convenient on the circuit
Only at the consumer unit
Select the three main purposes of cable trunking.
Protect cables from mechanical damage
Provide a neat routing and containment for cables
Support
Increase circuit voltage
Eliminate the need for circuit protection
What type of cable must be used when connecting to an immersion heater?
Heat‑resistant flexible cable
Standard speaker cable
Twin bell wire
Armoured SWA cable only
What safety device is a legal requirement on new immersion heaters?
Thermostat with integral overheat cut‑out
Surge protector only
Voltage indicator lamp
Timer switch
Is DC or AC electricity produced chemically?
DC
AC
What size of circuit Breaker is fitted to protect the ring circuit in a domestic consumer unit?
16 amp
32 amp
3 amp
13 amp
What size of circuit breaker is fitted to protect the immersion heater circuit in a domestic consumer unit?
32 amp
13 amp
16 amp
3 amp
If a central heating control circuit uses 720 Watts of electrical power, what size of circuit protection device would normally be fitted to provide over-current protection?
16 amp
32 amp
13 amp
3 amp
What is the name of the circuit protection device shown in the following diagram?
Circuit Breaker
Fuse
RCCB
RCD
What is the name of the circuit protection device shown in the following diagram
Fuse
Circuit Breaker
RCCB
Surge Protection
