NFPA70 Study Guide Correct Questions & Answers(LATEST UPDATE 2024)

What is an Arc Flash? - ANSWER A short circuit that jumps through the air from one exposed conductor to another. What makes an Ar Flash dangerous? - ANSWER Temperatures of up to 35k' F, shrapnel, molten metal, chocks, shockwave (2k lbs/foot^2), soud (140 dB), burn injuries. Hazard/Risk Category 1 contains PPE requirements. What are they? - ANSWER hardhat, safety glasses, hearing protection, heavy duty leather gloves, leather work shoes. What proper electrical PPE protect you from? - ANSWER burns, electrical shock and small shrapnel. What is PPE? - ANSWER Personal Protective Equipment If you are qualified to work on low-voltage equipment, what is the cut-off point where you are not allowed to perform electrical tasks at higher voltages? - ANSWER 50 - 600V What is the most important part of creating an electrically safe work condition - ANSWER Test for Voltage Once an electrically safe work condition is created, shock and arc flash protection are no longer necessary. (T/F) - ANSWER True The Arc Flash Protection Boundary is the distance from an arc source where an unprotected worker will receive first-degree burns. (T/F). - ANSWER False