NFPA70 Study Guide.pdf file:///C:/Users/HP/Desktop/New%20Conver/NFPA70%20Study%20G
NFPA70 Study Guide
1. What is an Arc Flash?
ANS A short circuit that jumps through the air from oneexposed conductor to another.
2. What makes an Ar Flash dangerous?
ANS Temperatures of up to 35k' F, shrapnel,molten metal, chocks, shockwave (2k lbs/foot^2),
soud (140 dB), burn injuries.
3. Hazard/Risk Category 1 contains PPE requirements. What are they?
ANS hard-hat, safety glasses, hearing protection, heavy duty leather gloves, leather work
shoes.
4. What proper electrical PPE protect you from?
ANS burns, electrical shock andsmall shrapnel.
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,NFPA70 Study Guide.pdf file:///C:/Users/HP/Desktop/New%20Conver/NFPA70%20Study%20G
5. What is PPE?
ANS Personal Protective Equipment
6. If you are qualified to work on low-voltage equipment, what is the cut-offpoint
where you are not allowed to perform electrical tasks at higher volt- ages?
ANS 50 - 600V
7. What is the most important part of creating an electrically safe work condi-tion
ANS Test for Voltage
8. Once an electrically safe work condition is created, shock and arc flashprotection
are no longer necessary. (T/F)
ANS True
9. The Arc Flash Protection Boundary is the distance from an arc source wherean
unprotected worker will receive first-degree burns. (T/F).
ANS False
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NFPA70 Study Guide
1. What is an Arc Flash?
ANS A short circuit that jumps through the air from oneexposed conductor to another.
2. What makes an Ar Flash dangerous?
ANS Temperatures of up to 35k' F, shrapnel,molten metal, chocks, shockwave (2k lbs/foot^2),
soud (140 dB), burn injuries.
3. Hazard/Risk Category 1 contains PPE requirements. What are they?
ANS hard-hat, safety glasses, hearing protection, heavy duty leather gloves, leather work
shoes.
4. What proper electrical PPE protect you from?
ANS burns, electrical shock andsmall shrapnel.
1/3
1 of 11 9/18/2024, 11:05
,NFPA70 Study Guide.pdf file:///C:/Users/HP/Desktop/New%20Conver/NFPA70%20Study%20G
5. What is PPE?
ANS Personal Protective Equipment
6. If you are qualified to work on low-voltage equipment, what is the cut-offpoint
where you are not allowed to perform electrical tasks at higher volt- ages?
ANS 50 - 600V
7. What is the most important part of creating an electrically safe work condi-tion
ANS Test for Voltage
8. Once an electrically safe work condition is created, shock and arc flashprotection
are no longer necessary. (T/F)
ANS True
9. The Arc Flash Protection Boundary is the distance from an arc source wherean
unprotected worker will receive first-degree burns. (T/F).
ANS False
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2 of 11 9/18/2024, 11:05
