NFPA70 Study Guide Questions with Correct Answers

NFPA70 Study Guide Questions with Correct Answers 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