Additional NERC Test Questions | Actual Questions and Answers Latest
Updated 2024/2025 (Graded A+)
1. Balancing Authority A is importing MW and has a tie-Iine flowing into them when the meter fails to
zero. Which of the following statements is true?
A) The Balancing Authority's frequency will drop
B) The Balancing Authority's generators on AGC will decrease output
C) The Balancing Authority's frequency will increase
D) The Balancing Authority's ACE reading will decrease - ✔✔B) The Balancing Authority's generators on
AGC will decrease output
2. Balancing Authority A has tie-line meter fail to zero on a line that is exporting 200 MWs. Which of the
following statements is true?
A) The Balancing Authority's total demand indication will increase
B) The Balancing Authority's generators on AGC will decrease output
C) The Balancing Authority's frequency will decrease
D) The Balancing Authority's ACE reading will increase - ✔✔A) The Balancing Authority's total demand
indication will increase
3. How does a System Operator realize the power system is getting close to the end of its available
reactive resources?
A) The voltage is increasing
B) The rate of decrease/increase of the voltage does not relate to change in the load
C) The rate of increase of the voltage decreases with the load
D) The rate of decrease of the voltage increases with the load - ✔✔D) The rate of decrease of the
voltage increases with the load
4. Which of the following indications would result from a significant loss of generation on an external
BA?
A) your ACE goes up and frequency stays the same
,B) your ACE stays the same and frequency increases
C) your ACE stays the same and frequency decreases
D) your ACE goes down and frequency drops - ✔✔D) your ACE goes down and frequency drops
5. You have restored a line to service after an outage. After closing the line, one of the phases shows no
current flow. What is your next action?
A) Have the on-site crew open the line
B) Notify your RC
C) Call the crew that restored the line to check reading on each phase
D) Report RTU problem - ✔✔C) Call the crew that restored the line to check reading on each phase
6. Which of the following would classify as an Operating Instruction?
A) Requesting generator status from a Generator Operator
B) Discussing Operating Plan with an Adjacent Transmission Operator
C) Directing a Generator Operator to maintain current MVAR output of a generator
D) Requesting outage information from a Distribution Provider - ✔✔C) Directing a Generator Operator
to maintain current MVAR output of a generator
7. After the winter morning peak, you have CTs base-loaded unable to decrease output and other units
unable to regulate any lower. Nuclear units are loaded and your solar is starting to pick up. ACE is
trending up and you have no regulation. What would you do? - ✔✔A) Take your CTs off-line
B) Increase Interchange out
C) Curtail solar power production
D) Consider available spinning reserve and replace resources planned for the day
:: A) Take your CTs off-line
8. How can you more effectively increase the MW transfer rate through a transmission line?
A) Decrease Voltage on the sending end
B) Change taps on the Phase Shifting Transformer (PST)
C) Increase load on the receiving end
, D) Install series reactor in the line - ✔✔B) Change taps on the Phase Shifting Transformer (PST)
9. Generators will trip on an under-frequency condition of approximately 57.5 Hz. What is the purpose
of generator under-frequency trips?
A) To protect the turbine from damage
B) To protect the generator windings from overheating
C) To rebalance generation and load and arrest the frequency drop
D) To prevent islanding conditions - ✔✔A) To protect the turbine from damage
10. What is the expected inrush of cold load?
A) less than 5 times the MVA
B) up to 10 times the MVA
C) up to 20 times the MVA
D) no changes in MVA - ✔✔B) up to 10 times the MVA
11. A Balancing Authority Area has two 800 MW generators, three 400 MW generators, and many
generators less than 200 MW. What is the MSSC for this Balancing Area?
A) 1600 MW
B) 800MW
C) 640 MW
D) 1200 MW - ✔✔B) 800MW
12. Line A has an SOL of 250 MVA and is currently loaded at 200 MVA) Line B is loaded at 500 MVA and
has an LODF of 0.2 to Line A. If Line B relays out what will be the new power flow on Line A?
A) 300 MVA
B) 325 MVA
C) 290 MVA
D) 245 MVA - ✔✔A) 300 MVA
Updated 2024/2025 (Graded A+)
1. Balancing Authority A is importing MW and has a tie-Iine flowing into them when the meter fails to
zero. Which of the following statements is true?
A) The Balancing Authority's frequency will drop
B) The Balancing Authority's generators on AGC will decrease output
C) The Balancing Authority's frequency will increase
D) The Balancing Authority's ACE reading will decrease - ✔✔B) The Balancing Authority's generators on
AGC will decrease output
2. Balancing Authority A has tie-line meter fail to zero on a line that is exporting 200 MWs. Which of the
following statements is true?
A) The Balancing Authority's total demand indication will increase
B) The Balancing Authority's generators on AGC will decrease output
C) The Balancing Authority's frequency will decrease
D) The Balancing Authority's ACE reading will increase - ✔✔A) The Balancing Authority's total demand
indication will increase
3. How does a System Operator realize the power system is getting close to the end of its available
reactive resources?
A) The voltage is increasing
B) The rate of decrease/increase of the voltage does not relate to change in the load
C) The rate of increase of the voltage decreases with the load
D) The rate of decrease of the voltage increases with the load - ✔✔D) The rate of decrease of the
voltage increases with the load
4. Which of the following indications would result from a significant loss of generation on an external
BA?
A) your ACE goes up and frequency stays the same
,B) your ACE stays the same and frequency increases
C) your ACE stays the same and frequency decreases
D) your ACE goes down and frequency drops - ✔✔D) your ACE goes down and frequency drops
5. You have restored a line to service after an outage. After closing the line, one of the phases shows no
current flow. What is your next action?
A) Have the on-site crew open the line
B) Notify your RC
C) Call the crew that restored the line to check reading on each phase
D) Report RTU problem - ✔✔C) Call the crew that restored the line to check reading on each phase
6. Which of the following would classify as an Operating Instruction?
A) Requesting generator status from a Generator Operator
B) Discussing Operating Plan with an Adjacent Transmission Operator
C) Directing a Generator Operator to maintain current MVAR output of a generator
D) Requesting outage information from a Distribution Provider - ✔✔C) Directing a Generator Operator
to maintain current MVAR output of a generator
7. After the winter morning peak, you have CTs base-loaded unable to decrease output and other units
unable to regulate any lower. Nuclear units are loaded and your solar is starting to pick up. ACE is
trending up and you have no regulation. What would you do? - ✔✔A) Take your CTs off-line
B) Increase Interchange out
C) Curtail solar power production
D) Consider available spinning reserve and replace resources planned for the day
:: A) Take your CTs off-line
8. How can you more effectively increase the MW transfer rate through a transmission line?
A) Decrease Voltage on the sending end
B) Change taps on the Phase Shifting Transformer (PST)
C) Increase load on the receiving end
, D) Install series reactor in the line - ✔✔B) Change taps on the Phase Shifting Transformer (PST)
9. Generators will trip on an under-frequency condition of approximately 57.5 Hz. What is the purpose
of generator under-frequency trips?
A) To protect the turbine from damage
B) To protect the generator windings from overheating
C) To rebalance generation and load and arrest the frequency drop
D) To prevent islanding conditions - ✔✔A) To protect the turbine from damage
10. What is the expected inrush of cold load?
A) less than 5 times the MVA
B) up to 10 times the MVA
C) up to 20 times the MVA
D) no changes in MVA - ✔✔B) up to 10 times the MVA
11. A Balancing Authority Area has two 800 MW generators, three 400 MW generators, and many
generators less than 200 MW. What is the MSSC for this Balancing Area?
A) 1600 MW
B) 800MW
C) 640 MW
D) 1200 MW - ✔✔B) 800MW
12. Line A has an SOL of 250 MVA and is currently loaded at 200 MVA) Line B is loaded at 500 MVA and
has an LODF of 0.2 to Line A. If Line B relays out what will be the new power flow on Line A?
A) 300 MVA
B) 325 MVA
C) 290 MVA
D) 245 MVA - ✔✔A) 300 MVA
