IEC 401 homework
Voltage testing and troubleshooting in a 120V rated electrical circuit would be considered energized work and the correct PPE would be required. Select one: a. True b. False
a. True
When there are multiple voltages inside a single enclosure, the highest exposed voltage is used to determine the shock hazard Select one: a. True b. False
a. True
The beige colored label located on the cuff of rubber insulating gloves indicates a class ___ rated glove Select one: a. 00 b. 1 c. 2 d. 4
a. 00
A unqualified person must stay a minimum distance of _____' from energized overhead power lines of 50kV or less. Select one: a. 10 b. 8 c. 6 d. 4
a. 10
When troubleshooting conductors or circuit parts rated 240V and less, an arc rated clothing system with a minimum rating of ____ is recommended by NFPA 70E. Select one: a. 4 cal/cm2 b. 8 cal/cm2 c. 10 cal/cm2 d. 40 cal/cm2
a. 4 cal/cm2
An energized electrical work permit is required when ________________. Select one: a. Performing work on conductors or devices that are not in an electrically safe work condition b. Troubleshooting c. Voltage testing d. Performing diagnostics
a. Performing work on conductors or devices that are not in an electrically safe work condition
The arc rating on arc flash protective equipment and clothing is ___. Select one: a. The incident energy that results in sufficient heat transfer through PPE to cause the onset of second-degree burns to bare skin in 6 cycles or 0.1 seconds b. The distance from exposed energized conductors or circuit parts that would cause the onset of second-degree burns to bare, unprotected skin in 6 cycles c. The closest an unqualified worker can come to exposed energized electrical conductors or circuit parts d. The incident energy (in cal/cm2) that would cause a 50% probability of the onset of a third-degree burns to bare skin underneath it in 6 cycles
a. The incident energy that results in sufficient heat transfer through PPE to cause the onset of second-degree burns to bare skin in 6 cycles or 0.1 seconds
Energized work is permitted when ___. Select one: a. Deenergizing will slow down production b. A greater hazard is created by deenergizing c. Deenergizing will cause long delays d. Large numbers of people will be idle for a long period of time
b. A greater hazard is created by deenergizing
Arc flash protective clothing and PPE are chosen by conducting an incident energy analysis or ___________. Select one: a. By completing an energized electrical work permit b. By using the tables in NFPA 70E 130.7(C) c. An arc flash hazard analysis d. Job briefing
b. By using the tables in NFPA 70E 130.7(C) and but not what the answer c. An arc flash hazard analysis
A fuse may be pulled while under load as long as the fuse puller is rated for the voltage. Select one: a. True b. False
b. False
The acronym ATPV stands for _______________. Select one: a. Available To Protect Vehicles b. Arc Temporary Performance Value c. Arc Thermal Performance Value d. Associated Temporary Protection Value
c. Arc Thermal Performance Value
The task of removing or inserting drawout-type circuit breakers is commonly known as ____. Select one: a. Operating b. Mounting c. Racking d. Setting
c. Racking
The NFPA 70E standard that covers the selection of PPE and equipment for energized work is Article ______. Select one: a. 100 b. 110 c. 120 d. 130
d. 130
The _______ Boundary is the distance from exposed energized conductors or circuit parts where a person would receive the onset of second-degree burns on bare, unprotected skin. Select one: a. Prohibited Approach b. Restricted Approach c. Limited Approach d. Arc Flash
d. Arc Flash
Items of inspection for rubber insulating gloves include all of the following except: Select one: a. UV damage b. Punctures c. Embedded or foreign material d. Open or loose seams
d. Open or loose seams
