Red Seal Construction Electrician Practice Exam

What is the purpose of a junction box?

1. To increase circuit resistance

2. To protect and house electrical connections and provide access for maintenance

3. To convert DC to AC power

4. To serve as a power source for devices

The correct answer is: To protect and house electrical connections and provide access for maintenance

The purpose of a junction box is to protect and house electrical connections while providing access for maintenance. This ensures that wiring connections are safeguarded from physical damage, moisture, and other environmental factors that could compromise the integrity of the electrical system. Junction boxes also allow for easy access to connections for troubleshooting and repairs, facilitating safe and efficient maintenance work. Junction boxes must meet specific codes and standards to ensure safety, as improper handling of electrical connections can lead to short circuits, fire hazards, or electrical shocks. Their design typically includes a removable cover, making it convenient for electricians to inspect or modify the wiring without disrupting the surrounding structures. The other options do not accurately describe the role of a junction box. Increasing circuit resistance does not align with the functions of a junction box, and while dish or transformers handle the conversion of DC to AC power, this is outside the scope of what a junction box does. Likewise, a junction box is not a source of power; instead, it serves as a means to organize and protect power connections.