CSLB Class B General Contractor's License Practice Exam

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Prepare for the CSLB Class B General Contractor's License Test with interactive flashcards and multiple choice questions. Each question offers hints and explanations to enhance your understanding and readiness for the exam.

Practice this question and more.

Which action is critical to take before performing electrical work?

Cut the power source
Test the voltage
Use insulated tools
Wear rubber gloves

The correct answer is: Cut the power source

Cutting the power source is a critical action to take before performing any electrical work because it safeguards against electrical shock or accidental electrocution. By ensuring that the power is turned off, you significantly reduce the risk of injury while working with or near electrical wiring and devices. When power is cut, it creates a safe environment for the electrician or contractor to work on electrical systems. This action also ensures that tools and equipment can be handled without the danger of live electrical components, which adds an extra layer of safety. While testing the voltage, using insulated tools, and wearing rubber gloves are all important safety measures, they should take place within the broader context of first ensuring that the power is indeed off. If the power is not cut before these precautions are taken, the risk of electrical hazard remains, undermining the effectiveness of those subsequent safety measures. Thus, cutting the power source is the foundational step that precedes all other safety actions in electrical work.