Advanced Electrical Troubleshooting Quiz

Which of the following is NOT a common electrical component found in electrical controls?

• Relays

• Transformers

• Light bulbs

• Thermostats

What should you test first when troubleshooting with the power off?

• Movement of the armature

• Resistance of the coil

• Visual inspection of contacts

• Voltage of the circuit

What should you do if the armature does not move freely?

• Replace the entire system

• Assume everything is fine

• Check if the contacts may be welded or stuck

• Increase the power supply

What should be present at the coil for the armature to be activated?

• No voltage

• A voltage drop equal to the control power supply

• A closed contact

• An open contact

What should you wear to test live power on a solid state relay?

• Regular clothes

• Safety goggles

• Required Electrical PPE

• A lab coat

What tool is used to test the primary voltage?

• Ohmmeter

• Voltmeter

• Ammeter

• Thermometer

On a control transformer, what should the secondary voltage be equal to if the primary voltage is correct?

• Half of the primary voltage

• Twice the primary voltage

• Equal to the labeled secondary voltage

• Zero volts

What should be checked with a voltmeter when testing a defrost timer?

• Temperature

• Pressure

• Full voltage at terminal 2

• Humidity

What is the main device used to operate HVAC and refrigeration equipment?

• Thermostat

• Compressor

• Fan

• Transformer

On a "No Heat" service call, what should you do if the thermostat is programmable?

• Check the programming

• Change the color

• Replace the batteries

• Move it to another room