Page 1 of 131
NERC Certification After Class Exam all 500
QUESTIONS AND CORRECT ANSWERS LATEST
UPDATE THIS YEAR NEW!!
You have restored a line to service after an outage . After shows no current flow . What is
your next action ? closing the line , one of the phases
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
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
1
,Page 2 of 131
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
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)
Balancing Authority A is importing MW and has a tie-line flowing into them when the meter
fails to zero. Which of the following statements is true?
a . The Balancing Authority's frequency will drop
2
,Page 3 of 131
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
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
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
3
, Page 4 of 131
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
c. your ACE stays the same and frequency decreases
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
What is the expected inrush of cold load ?
a . less than 5 times the MVA
b . up to 10 times the MVA
4
NERC Certification After Class Exam all 500
QUESTIONS AND CORRECT ANSWERS LATEST
UPDATE THIS YEAR NEW!!
You have restored a line to service after an outage . After shows no current flow . What is
your next action ? closing the line , one of the phases
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
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
1
,Page 2 of 131
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
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)
Balancing Authority A is importing MW and has a tie-line flowing into them when the meter
fails to zero. Which of the following statements is true?
a . The Balancing Authority's frequency will drop
2
,Page 3 of 131
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
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
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
3
, Page 4 of 131
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
c. your ACE stays the same and frequency decreases
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
What is the expected inrush of cold load ?
a . less than 5 times the MVA
b . up to 10 times the MVA
4
