Question

fill in the blank with the correct term that you learned from your study of this module.

1. a life - threatening condition of the heart in which the muscle fibers contract irregularly is called ______________.
2. tools that have a case made of nonconductive material and have been constructed so that the case is insulated from electrical energy are called ______________.
3. chemicals known as ______________ may be found in certain types of large transformers and capacitors.
4. a ______________ will de - energize a circuit or a portion of it if the current to ground exceeds some predetermined value.
5. situations that put a worker at risk due to the demands of the task, conditions, worker attitude, and/or environment are known as ______________.
6. a ______________ has a three - prong plug at the end of its power cord or some other means to ensure that stray current travels to ground without passing through the body of the operator.
7. one who has demonstrated the skills and knowledge related to the construction and operation of the electrical equipment and installations and has received safety training to identify and avoid the hazards involved is known as a ______________.
8. the ______________ is an approach limit at a distance from an exposed energized electrical conductor or circuit part within which there is an increased likelihood of electric shock.
9. the ______________ is an approach limit at a distance from an exposed energized electrical conductor or circuit part within which a shock hazard exists.
10. the ______________ is an approach limit at a distance from exposed energized electrical conductors or circuit parts within which a person could receive a second - degree burn if an electrical arc flash were to occur.
11. the amount of thermal energy impressed on a surface at a certain distance from the source of an electrical arc is known as the ______________.
12. a first - year electrical apprentice is most likely to be an ______________.
13. a garment’s ______________ is its maximum incident energy resistance demonstrated prior to material breakdown, or at the onset of a second - degree skin burn.
14. an ______________ is used to study a worker’s potential exposure to arc flash energy.
15. a temporary ground would be removed using a ______________.

trade terms
arc flash boundary (afb) fibrillation
arc flash risk assessment grounded tool
arc rating ground fault circuit
double - insulated/ ungrounded tools interrupter (gfci)
error precursors hot stick
incident energy
limited approach boundary
polychlorinated biphenyls (pcbs)
qualified person
restricted approach boundary
unqualified person

Explanation:

1. Fibrillation refers to the irregular contraction of heart - muscle fibers which is life - threatening.
2. Double - insulated/ungrounded tools have non - conductive cases and are insulated from electrical energy.
3. Polychlorinated biphenyls (PCBs) may be found in certain large transformers and capacitors.
4. A ground fault circuit interrupter (GFCI) de - energizes a circuit when current to ground exceeds a preset value.
5. Error precursors are situations that put a worker at risk due to task, conditions, attitude, or environment.
6. A grounded tool has a three - prong plug or other means to ensure stray current goes to ground.
7. A qualified person has skills and knowledge related to electrical equipment and installations and safety training.
8. Limited approach boundary is an approach limit with increased shock likelihood.
9. Restricted approach boundary is an approach limit where a shock hazard exists.
10. Arc flash boundary (AFB) is an approach limit where a second - degree burn could occur from an arc flash.
11. Incident energy is the thermal energy from an electrical arc at a certain distance.
12. A first - year electrical apprentice is likely an unqualified person.
13. Arc rating is a garment's maximum incident energy resistance.
14. Arc flash risk assessment is used to study a worker's potential arc flash exposure.
15. A hot stick is used to remove a temporary ground.

Answer:

1. Fibrillation
2. Double - insulated/ungrounded tools
3. Polychlorinated biphenyls (PCBs)
4. Ground fault circuit interrupter (GFCI)
5. Error precursors
6. Grounded tool
7. Qualified person
8. Limited approach boundary
9. Restricted approach boundary
10. Arc flash boundary (AFB)
11. Incident energy
12. Unqualified person
13. Arc rating
14. Arc flash risk assessment
15. Hot stick