Maintenance Technician Practice Test 2025 - Free Maintenance Technician Practice Questions and Prep Guide

Question: 1 / 400

What is the function of a fuse?

To connect multiple circuits together

To protect electrical circuits from overload by breaking the circuit

The function of a fuse is to protect electrical circuits from overload by breaking the circuit. Fuses are designed to allow a certain amount of current to flow through them. When the current exceeds the rated capacity of the fuse, it causes the fuse element to melt or rupture, thereby interrupting the flow of electricity. This process prevents excessive current from damaging wiring, appliances, or other components in the electrical system, thereby safeguarding against potential fire hazards or equipment failure.

While connecting circuits, enhancing flow, or stabilizing voltage may be important functions in electrical systems, these do not accurately describe the primary role of a fuse. A fuse acts specifically as a safety device to prevent overloads, making it vital for maintaining circuit integrity and safety.

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To enhance electrical flow

To stabilize voltage levels

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