NCCER Electrical Level 2 Module 5 Test
Questions and Answers | Latest Version
| 2024/2025 | Correct & Verified
What is an "arc fault" in an electrical system?
✔✔ An electrical malfunction caused by a high-energy discharge that can lead to fires
What is the standard method for calculating electrical power in a circuit?
✔✔ Power is calculated using the formula: P = V × I (where P is power, V is voltage, and I is
current)
What does the term "high-leg delta" refer to in electrical systems?
✔✔ It refers to a specific type of three-phase system where one leg has a higher voltage than the
others
What is the role of a fuse in overcurrent protection?
✔✔ It is a safety device that melts when the current exceeds a specified level, breaking the
circuit
1
, What does "voltage drop" affect in long-distance electrical wiring?
✔✔ It can cause a loss of voltage at the load end of the circuit, resulting in reduced performance
of electrical devices
What is the function of a load center in an electrical system?
✔✔ To distribute electricity to various circuits and provide protection against overcurrent
What is the definition of "electrical impedance"?
✔✔ The opposition that a circuit presents to the flow of alternating current
What is the primary purpose of a grounding electrode conductor?
✔✔ To connect the electrical system to the ground for safety and fault protection
What is the difference between a single-phase and a three-phase electrical system?
✔✔ A single-phase system uses one alternating current (AC) waveform, while a three-phase
system uses three AC waveforms to provide more consistent power
What does a continuity test check for?
2
Questions and Answers | Latest Version
| 2024/2025 | Correct & Verified
What is an "arc fault" in an electrical system?
✔✔ An electrical malfunction caused by a high-energy discharge that can lead to fires
What is the standard method for calculating electrical power in a circuit?
✔✔ Power is calculated using the formula: P = V × I (where P is power, V is voltage, and I is
current)
What does the term "high-leg delta" refer to in electrical systems?
✔✔ It refers to a specific type of three-phase system where one leg has a higher voltage than the
others
What is the role of a fuse in overcurrent protection?
✔✔ It is a safety device that melts when the current exceeds a specified level, breaking the
circuit
1
, What does "voltage drop" affect in long-distance electrical wiring?
✔✔ It can cause a loss of voltage at the load end of the circuit, resulting in reduced performance
of electrical devices
What is the function of a load center in an electrical system?
✔✔ To distribute electricity to various circuits and provide protection against overcurrent
What is the definition of "electrical impedance"?
✔✔ The opposition that a circuit presents to the flow of alternating current
What is the primary purpose of a grounding electrode conductor?
✔✔ To connect the electrical system to the ground for safety and fault protection
What is the difference between a single-phase and a three-phase electrical system?
✔✔ A single-phase system uses one alternating current (AC) waveform, while a three-phase
system uses three AC waveforms to provide more consistent power
What does a continuity test check for?
2
