How many types of room thermostats are classified based on connection?

• Four

• Three

• One

• Two

Which of the following is not a type of room thermostat based on classification?

• Analog thermostat

• Digital clock thermostat

• Analog clock thermostat

• Digital thermostat

What is the electrical diagram component placed at 'add t1'?

• Room thermostat

• Security thermostat boiler

• Boiler thermostat

• Fuse

What does Si represent in the electrical diagram of an oil boiler?

• Fuse

• Room thermostat

• Security thermostat boiler

• Boiler thermostat

Which component is represented by 'M' in the electrical diagram of an oil boiler?

• Room thermostat

• Motor

• Boiler thermostat

• Fuse

What does BV1 stand for in the electrical diagram of an oil boiler?

• Electromagnet valve

• Infra-red photocell

• Ionization electrode

• Ignition electrode

What is the purpose of QRB in the electrical diagram of an oil boiler?

• Fuse

• Boiler thermostat

• Ionization electrode

• Infra-red photocell

What is the function of the thermal kickback protection (PTC) in the electrical diagram of a burner relay oil burner?

• Ignition electrode

• Temperature sensor input central heating

• Ionization electrode

• Temperature sensor output central heating

What is represented by '3' in the electrical diagram of a burner relay oil burner?

• Thermal kickback protection (PTC)

• Temperature sensor input central heating

• Temperature sensor output central heating

• Ionization electrode

What does '6' signify in the electrical diagram of a burner relay oil burner?

• Ignition electrode

• Thermal kickback protection (PTC)

• Ionization electrode

• Temperature sensor input central heating