HVAC Electrical Components Quiz

Which component in an HVAC system is responsible for starting the compressor directly?

• Thermostat

• Contactor

• Capacitor

• Relay

What is the primary function of a capacitor in an HVAC system?

• To regulate temperature

• To store electrical energy and provide a boost during startup

• To control the fan speed

• To measure humidity levels

In an HVAC electrical schematic, what does this symbol represent

• Resistor

• Capacitor

• Inductor

• Transformer

What is the purpose of a relay in an HVAC system?

• To increase voltage

• use low voltage to control high voltage

• To measure current

• To provide thermal protection

Which component is used to protect an HVAC system from electrical overload?

• Contactor

• Relay

• Circuit breaker

• Thermostat

How can you identify a blown fuse in an HVAC system?

• By checking for continuity with a multimeter

• By checking for ohms with a multimeter

• By visual inspection

• All of the above

What does a transformer do in an HVAC system?

• Converts AC to DC

• Steps up or steps down voltage

• Measures temperature

• Controls fan speed

Which of the following is NOT a common electrical issue in HVAC systems?

• Short cycling

• Blown fuses

• Refrigerant leaks

• Tripped circuit breakers

What is the function of a contactor in an HVAC system?

• To measure voltage

• To control the flow of electricity to the compressor and fan

• To regulate temperature

• To provide thermal protection

When reading an HVAC electrical schematic, what does the symbol with a zigzag line represent?

• Capacitor

• Resistor

• Inductor

• Transformer