Washington Esthetician State Board Practice Exam

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Study for the Washington Esthetician Exam. Prepare with our multiple choice questions and detailed explanations to ensure you're ready for the exam. Ace your test with our practice tools!

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An electrical plug with one rectangular prong larger than the other is designed to ensure what?

Efficiency
Compatibility
Grounding
Voltage regulation

The correct answer is: Grounding

The design of an electrical plug with one rectangular prong larger than the other serves an important safety function, specifically grounding. This configuration ensures that the plug can only be inserted into the outlet in one way, aligning the larger prong with the ground slot of the receptacle. The larger prong acts as the ground connection, which is critical for preventing electrical shock and ensuring safety when using the device. Proper grounding provides a safe pathway for electricity to return to the ground in case of a fault, minimizing the risk of electric shock. If the plug were to be inserted the wrong way, the device would not be grounded, potentially leading to hazardous situations. Thus, this design is a key feature in electrical safety standards to protect users and appliances from electrical faults. The other options do not accurately describe the primary purpose of this design; efficiency, compatibility, and voltage regulation pertain to other aspects of electrical systems but not specifically to the grounding mechanism inherent in this plug design.