HVAC Multimeter Skills Quiz

What is the primary function of a multimeter in HVAC systems?

• To measure temperature

• To measure electrical properties like voltage, current, and resistance

• To control the HVAC system

• To clean the air filters

Which setting on a multimeter is used to measure AC voltage in an HVAC system?

• DCV

• ACV

• Ohms

• Amps

When measuring resistance in a circuit, what unit does the multimeter display?

• Volts

• Amperes

• Ohms

• Watts

What is the difference between AC and DC current?

• AC is constant, DC changes direction

• AC changes direction, DC is constant

• Both AC and DC change direction

• Both AC and DC are constant

Which of the following is a basic troubleshooting technique for HVAC systems?

• Replacing the entire system

• Checking for blown fuses or tripped breakers

• Ignoring the problem

• Increasing the thermostat setting

How do you interpret a multimeter reading of 0 volts across a component in a circuit?

• The component is functioning properly

• There is no power supply to the component

• The multimeter is broken

• The component is short-circuited

What is the first step in using a multimeter to measure voltage in an HVAC system?

• Set the multimeter to the resistance setting

• Connect the multimeter to the power source

• Set the multimeter to the correct voltage range

• Turn off the HVAC system

• The circuit is open

• The circuit is closed

• The resistance is zero

• The multimeter is malfunctioning

Which of the following is a correct procedure for testing resistance in a circuit using a multimeter?

• Measure resistance with the circuit powered on

• Measure resistance with the circuit powered off

• Measure resistance with the multimeter set to voltage

• Measure resistance with the multimeter set to current

What does a multimeter reading of 0 ohms indicate about a circuit?

• The circuit is open

• The circuit is shorted

• The circuit is functioning normally

• The multimeter is not working