Electrical Components Quiz

What component contains a calibrated bimetallic strip and turns off the electrical supply when the preset temperature is sensed?

• Immersion Heater

• Zone Valve

• Cylinder Thermostat

• Boiler

What is the voltage for single-phase installations?

• 110V

• 230V

• 400V

• 500V

What is the voltage between phases in three-phase installations?

• 110V

• 230V

• 400V

• 500V

What type of cable is used on appliances and equipment like pumps?

• PVC two-core and earth

• Flex cables

• Armoured cable

• Heat-resistant flex

What is the neutral color code for single-phase 230V?

• Brown

• Blue

• Green and yellow

• Black

What is the color code for L3 in three-phase 400V?

• Brown

• Black

• Grey

• Blue

Which step is essential to identify the correct circuit during the safe stages of isolation?

• Select a suitable test meter

• Prove the device is working

• Identify the circuit/appliance

• Recheck voltage indicator

What is the primary voltage in domestic electrical systems, including areas of moisture?

• 110V AC

• 230V AC

• 400V AC

• 12V DC

What is the purpose of a multi-hole clasp in the safe stages of isolation?

• To select a suitable test meter

• To add a warning notice

• To retain the key

• To recheck voltage indicator

What is the purpose of confirming isolation in the safe stages of isolation?

• To ensure the voltage indicator is functioning

• To check voltage from live to earth and neutral

• To identify the circuit/appliance

• To select a suitable test meter