HVAC and Thermostat Wiring Quiz

What is the typical voltage rating for most HVAC systems?

• 240 Volts

• 120 Volts

• 12 Volts

• 24 Volts

What color is typically used for the 'Common wire' in thermostat wiring?

• Red

• Blue/Black

• Yellow

• Green

Which component is NOT typically part of the heating components in an HVAC system?

• Heat pump

• Oil furnace

• Air conditioner

• Gas furnace

What should you do first when replacing a thermostat?

• Detach all wires

• Turn off the power supply

• Connect new wires

• Take a picture of the old wiring

What does the 'R' label stand for in thermostat wiring?

• Common wire

• 24V Power

• Reverse valve in cooling

• Heating

Which color is NOT a standard for any specific function in thermostat wiring?

• Orange

• Purple

• Yellow

• White

What is the function of the 'C' wire in a thermostat system?

• Provides emergency heating

• Controls the indoor fan

• Acts as a reverse valve in cooling

• Creates a continuous 24V power loop

What should you check before installing a thermostat to ensure safety?

• Color of the thermostat

• Voltage rating of the thermostat

• Weight of the thermostat

• Brand of the thermostat

Which wire color is typically used for 'Cooling'?

• Yellow

• White

• Red

• Blue

What is the first step when adding a C wire to a system that lacks one?

• Detach the thermostat

• Use a C wire adapter kit

• Turn off the power supply

• Run a new cable from the furnace