NERC Certification After Class Exam Questions and Answers.
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
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 - Correct Answer 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 - Correct Answer 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 - Correct Answer d . The
rate of decrease of the voltage increases with the load
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 - Correct Answer c. your ACE stays the
same and frequency decreases
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 - Correct Answer 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 - Correct Answer c.
Directing a Generator Operator to maintain current MVAR output of a generator
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 -
Correct Answer 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 - Correct Answer b. Change taps on the Phase
Shifting Transformer (PST)
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 - Correct Answer 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
c . up to 20 times the MVA
d . no changes in MVA - Correct Answer b . up to 10 times the MVA
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. 800 MW
c. 640 MW
d. 1200 MW - Correct Answer b. 800 MW
But 640MW is the reportable event threahold
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
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 - Correct Answer 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 - Correct Answer 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 - Correct Answer d . The
rate of decrease of the voltage increases with the load
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 - Correct Answer c. your ACE stays the
same and frequency decreases
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 - Correct Answer 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 - Correct Answer c.
Directing a Generator Operator to maintain current MVAR output of a generator
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 -
Correct Answer 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 - Correct Answer b. Change taps on the Phase
Shifting Transformer (PST)
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 - Correct Answer 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
c . up to 20 times the MVA
d . no changes in MVA - Correct Answer b . up to 10 times the MVA
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. 800 MW
c. 640 MW
d. 1200 MW - Correct Answer b. 800 MW
But 640MW is the reportable event threahold
