Red Seal Construction Electrician Practice Exam

What is typically the primary function of an electrical transformer?

1. To store energy for devices

2. To change the voltage level in an electrical system

3. To convert electrical flow direction

4. To regulate heating elements

The correct answer is: To change the voltage level in an electrical system

The primary function of an electrical transformer is to change the voltage level in an electrical system. Transformers are essential components in electrical power distribution, allowing the adjustment of voltage levels to meet different requirements. By stepping up (increasing) or stepping down (decreasing) voltage, transformers enable efficient transmission of electricity over long distances while minimizing energy losses. In practical applications, they facilitate the safe use of electricity at residential, commercial, and industrial levels by providing the appropriate voltage for devices and systems. This capability is crucial for maintaining the balance between supply and demand in electrical grids and ensuring that devices operate within their designated voltage specifications.