Master Electrician Practice Exam

Which component protects electrical circuits from overloads and short circuits?

1. Transformer

2. Fuses

3. Capacitors

4. Receptacles

The correct answer is: Fuses

Fuses are designed specifically to protect electrical circuits from overloads and short circuits. They work by melting and breaking the circuit when the current exceeds the safe level, thereby preventing damage to the wiring and connected devices. This interruption enhances safety by ensuring that excessive current does not lead to overheating or potential fire hazards. In contrast, transformers are used to change the voltage levels of electrical energy and do not offer protection against overloads or short circuits. Capacitors store electrical energy and help with power factor correction but do not serve as protective devices. Receptacles provide a point of connection for electrical devices but do not protect the circuit from faults. Therefore, fuses are the correct component for the task of protecting circuits from overload and short circuit conditions.