California State Board Barber Practice Exam

When electrical tools are not properly grounded, there is a significant risk of electrical shock to both the barber and the client. Grounding provides a safe path for electricity to flow in case of a fault, which can occur if there is insulation failure or a short circuit. Without proper grounding, the tools can carry stray electricity that poses a danger to anyone using or in contact with the equipment.

The other options focus on different issues that may arise with tools, but they do not directly address the safety risk associated with improper grounding. While overheating of tools, increased service duration, and reduced efficacy may occur due to other factors like overuse or maintenance issues, they do not present the immediate and serious hazard of electrical shock that grounding is designed to prevent. Thus, ensuring that electrical tools are grounded properly is crucial to maintaining a safe environment in a barbershop.