electrical ppt 9

What does the term 'permanent live' refer to.

• A constant power supply

• A temporary connection

• A backup power source

• A disconnected wire

What is the next stage of the circuit after ensuring power out of the switched live out?

• Checking the live in terminal

• Inspecting the common terminal

• Looking at the relevant zone valve

• Testing the neutral terminal

What does an infinity reading on the motor suggest?

• The motor is functioning properly.

• The motor is not functioning.

• The motor is overheating.

• The motor is disconnected.

What does a multimeter measure when set to Ω?

• Resistance

• Voltage

• Current

• Frequency

What is the main component being tested in the zone valve?

• Synchronous motor

• Thermostat

• Pressure valve

• Circuit breaker

What does the multimeter display when the motor is not functioning?

• An infinity reading

• A resistance reading

• A voltage reading

• A current reading

What should be done if an infinity (OL) reading is observed?

• Increase the voltage.

• Replace the motor.

• Decrease the resistance.

• Adjust the current.

What is the first step in the basic sequence of operation on a gas fired fanned-flue boiler?

• Fan operates

• Boiler thermostat calling for heat

• Signal to the boiler control panel from the zone valve

• Main burner ignites

What is the function of the fan in a boiler system?

• To circulate water

• To expel exhaust gases

• To ignite the flame

• To control the gas valve

Which component is responsible for moving water through the boiler system?

• Fan

• Pump

• Gas valve

• Thermistor