9189 Pre-installation activity prior to undertaking electric

What is the primary function of programmers in heating systems?

• To monitor room temperature

• To turn on the central heating or hot water at varying times

• To control the boiler and pump

• To measure external temperatures

What type of thermostat uses electronic sensors to monitor temperature?

• Programmers

• Room thermostats

• Cylinder thermostats

• Zone valves

At what temperature range should a cylinder thermostat be set to operate?

• 50 to 55 °C

• 60 to 65 °C

• 70 to 75 °C

• 80 to 85 °C

What is the purpose of a zone valve in a heating system?

• To measure room temperature

• To control the boiler and pump

• To provide a Wi-Fi connection

• To monitor external temperatures

What technological advancement allows home automation devices to control heating systems remotely?

• Programmers

• Cylinder thermostats

• Internet of things (IoT)

• Zone valves

When did the Electricity at Work Regulations come into force?

• 1 April 1989

• 1 April 1990

• 1 April 1991

• 1 April 1992

What are common electrical dangers on site?

• Electric shock, electrical burns, loss of muscle control, fires, arcing and explosion

• Electric shock, water damage, loss of muscle control, fires, arcing and explosion

• Electric shock, electrical burns, loss of muscle control, water damage, arcing and explosion

• Electric shock, electrical burns, loss of muscle control, fires, water damage

What is a more dangerous situation in terms of shock path?

• Hand-to-foot shock path

• Hand-to-hand shock path

• Foot-to-foot shock path

• Head-to-foot shock path

What can cause electrical burns?

• Exposure to low-frequency radiation

• Exposure to high-frequency radiation

• Exposure to ultraviolet radiation

• Exposure to infrared radiation

What is the average body impedance at 230 V?

• 1000 Ω

• 1200 Ω

• 1300 Ω

• 1500 Ω