Red Seal Appliance Service Technician Practice Exam

Which tool is used to safely discharge capacitors in appliances?

1. A multimeter

2. A capacitor discharge tool or a resistor

3. A flathead screwdriver

4. An insulation resistance tester

The correct answer is: A capacitor discharge tool or a resistor

To safely discharge capacitors in appliances, the use of a capacitor discharge tool or a resistor is the appropriate choice. Capacitors can store a significant amount of electrical energy, and if they are not properly discharged, they can pose a serious shock hazard to technicians. A dedicated capacitor discharge tool is designed specifically for this purpose, often incorporating a resistor to manage the discharge safely and prevent damaging the capacitor or the circuit. Using a resistor allows for controlled discharge, slow enough to dissipate the stored energy without causing a sudden surge that could create a spark or damage components. This method ensures safety for the technician and protects sensitive appliance circuitry from potential damage caused by a rapid discharge. In contrast, other tools such as a multimeter or insulation resistance tester may be useful for measuring voltage or assessing insulation quality, but they are not designed for safely discharging capacitors. A flathead screwdriver might be misused to short the terminals of the capacitor, which can be unsafe. Thus, utilizing a capacitor discharge tool or a resistor is the best practice for safely managing high-voltage components in appliances.