NERC RC Exam Prep 2026 | Verified Ques ons & Answers | Reliability
Coordinator Study Guide + Prac ce Test | Updated
When does the Con ngency Reserve Restora on Period begin?
A. At the top of the hour a er the Reportable Disturbance
B. At the start of the Reportable Disturbance
C. At the end of the Disturbance Recovery Period
D. When all Con ngency Reserve has been exhausted - C. At the end of the Disturbance
Recovery Period
Which of the following terms is defined as the scan rate values of a Balancing Authority's ACE
measured in MW, which includes the difference between the Balancing Authority's Net
Interchange Actual and its Net Interchange Scheduled, plus its Frequency Bias obliga on, plus
any known meter error?
A. Automa c Time Error
B. Repor ng ACE
C. ACE Control Error
D. Reserve Sharing Group Repor ng - B. Repor ng ACE
Which of the following terms applies to the Western Interconnec on only, and the addi on of
a component to the ACE equa on that modifies the control point for the purpose of
con nuously paying back Primary Inadvertent Interchange to correct accumulated me error?
A. Repor ng ACE
B. Automa c Time Error Correc on
C. Reserve Sharing Group Repor ng ACE
,D. Regula on Reserve Sharing Group - B. Automa c Time Error Correc on
You are a Balancing Authority Operator. A neighboring Balancing Authority in the
Interconnec on suddenly has a 500 MW generator trip due to a generator ground. What part of
the ACE equa on, ACE = (NIA-NIS) - 10B (FA-FS) - IME, allows you and other Balancing
Authori es in the Interconnec on to help stabilize the Interconnec on frequency error?
A. (FA- FS) - IME
B. NIA - NIS
C. 10B (FA-FS)
D. 4 IME - C. 10B (FA-FS)
Balancing Authority A is scheduled to import a net 200 MW and is actually impor ng a net 150
MW. The Bias Se=ng is -100 MW/.1 HZ and Actual Frequency is 59.95 Hz. What is Balancing
Authority A's ACE reading?
A. +100 MW
B. -100 MW
C. 0 MW
D. -55 MW - C. 0 MW
Which of the following elements is NOT included in the ACE equa ons frequency component?
A. Actual Frequency (FA)
B. Scheduled Frequency (FS)
C. Frequency Bias Se=ng (B)
D. Meter Error (IME) - D. Meter Error (IME)
, A Balancing Authority is slightly undergenera ng its Actual System Frequency (FA) is 60.03 Hz.
What is the result of the Balancing Authority's ac on?
A. The Balancing Authority is helping the Interconnec on Frequency.
B. The Balancing Authority is in CPS1 viola on.
C. The Balancing Authority is hur ng the Interconnec on Frequency.
D. The Balancing Authority is in BAAL viola on - A. The Balancing Authority is helping the
Interconnec on Frequency
Which statement best describes the CPS1 requirement?
A. ACE must follow changes in load and schedule within a bandwidth called L10.
B. The Responsible En ty must operate so its CPS1 is greater than or equal to 100% for the
preceding 12-month period.
C. The average ACE for a defined 10-minute period must be within a limit called L10.
D. ACE must start to return to zero one minute a er crossing zero. - B. The Responsible En ty
must operate so its CPS1 is greater than or equal to 100% for the preceding 12-month period
A Balancing Authority's CPS1 calcula on is computed using its clock-minute average of two
values. What are those two values?
A. Repor ng ACE and Frequency Error
B. Actual and Scheduled Net Interchange NIA and NIS.
C. L10 and Repor ng ACE
D. Actual and Scheduled Frequency (FA and FS) - A. Repor ng ACE and Frequency Error
, To conform to CPS requirements, a Balancing Authority must have which of the following?
A. CPS1 greater than or equal to 90% or BAAL greater than or equal to 100%.
B. CPS1 greater than or equal to 100% and ACE does not exceed BAAL more than 15 consecu ve
minutes.
C. CPS1 greater than or equal to 100% and ACE does not exceed BAAL more than 30 consecu ve
minutes.
D. CPS1 greater than or equal to 90% and ACE does not exceed BAAL more than 30 consecu ve
minutes. - C. CPS1 greater than or equal to 100% and ACE does not exceed BAAL more than 30
consecu ve minutes.
What should a Balancing Authority set Scheduled Frequency to for a slow Time Error
Correc on?
A. 60.02 Hz
B. 59.98 Hz
C. 59.80 Hz
D. 60.20 Hz - A. 60.02 Hz
Which of the following is a poten al source of Con ngency Reserve?
1. Offline genera on that takes 10 minutes to start and ramp to full output
2. Online genera on at full load
3. Controllable load resources
4. Voltage reduc ons
A. 3 and 4
B. 2 and 3
Coordinator Study Guide + Prac ce Test | Updated
When does the Con ngency Reserve Restora on Period begin?
A. At the top of the hour a er the Reportable Disturbance
B. At the start of the Reportable Disturbance
C. At the end of the Disturbance Recovery Period
D. When all Con ngency Reserve has been exhausted - C. At the end of the Disturbance
Recovery Period
Which of the following terms is defined as the scan rate values of a Balancing Authority's ACE
measured in MW, which includes the difference between the Balancing Authority's Net
Interchange Actual and its Net Interchange Scheduled, plus its Frequency Bias obliga on, plus
any known meter error?
A. Automa c Time Error
B. Repor ng ACE
C. ACE Control Error
D. Reserve Sharing Group Repor ng - B. Repor ng ACE
Which of the following terms applies to the Western Interconnec on only, and the addi on of
a component to the ACE equa on that modifies the control point for the purpose of
con nuously paying back Primary Inadvertent Interchange to correct accumulated me error?
A. Repor ng ACE
B. Automa c Time Error Correc on
C. Reserve Sharing Group Repor ng ACE
,D. Regula on Reserve Sharing Group - B. Automa c Time Error Correc on
You are a Balancing Authority Operator. A neighboring Balancing Authority in the
Interconnec on suddenly has a 500 MW generator trip due to a generator ground. What part of
the ACE equa on, ACE = (NIA-NIS) - 10B (FA-FS) - IME, allows you and other Balancing
Authori es in the Interconnec on to help stabilize the Interconnec on frequency error?
A. (FA- FS) - IME
B. NIA - NIS
C. 10B (FA-FS)
D. 4 IME - C. 10B (FA-FS)
Balancing Authority A is scheduled to import a net 200 MW and is actually impor ng a net 150
MW. The Bias Se=ng is -100 MW/.1 HZ and Actual Frequency is 59.95 Hz. What is Balancing
Authority A's ACE reading?
A. +100 MW
B. -100 MW
C. 0 MW
D. -55 MW - C. 0 MW
Which of the following elements is NOT included in the ACE equa ons frequency component?
A. Actual Frequency (FA)
B. Scheduled Frequency (FS)
C. Frequency Bias Se=ng (B)
D. Meter Error (IME) - D. Meter Error (IME)
, A Balancing Authority is slightly undergenera ng its Actual System Frequency (FA) is 60.03 Hz.
What is the result of the Balancing Authority's ac on?
A. The Balancing Authority is helping the Interconnec on Frequency.
B. The Balancing Authority is in CPS1 viola on.
C. The Balancing Authority is hur ng the Interconnec on Frequency.
D. The Balancing Authority is in BAAL viola on - A. The Balancing Authority is helping the
Interconnec on Frequency
Which statement best describes the CPS1 requirement?
A. ACE must follow changes in load and schedule within a bandwidth called L10.
B. The Responsible En ty must operate so its CPS1 is greater than or equal to 100% for the
preceding 12-month period.
C. The average ACE for a defined 10-minute period must be within a limit called L10.
D. ACE must start to return to zero one minute a er crossing zero. - B. The Responsible En ty
must operate so its CPS1 is greater than or equal to 100% for the preceding 12-month period
A Balancing Authority's CPS1 calcula on is computed using its clock-minute average of two
values. What are those two values?
A. Repor ng ACE and Frequency Error
B. Actual and Scheduled Net Interchange NIA and NIS.
C. L10 and Repor ng ACE
D. Actual and Scheduled Frequency (FA and FS) - A. Repor ng ACE and Frequency Error
, To conform to CPS requirements, a Balancing Authority must have which of the following?
A. CPS1 greater than or equal to 90% or BAAL greater than or equal to 100%.
B. CPS1 greater than or equal to 100% and ACE does not exceed BAAL more than 15 consecu ve
minutes.
C. CPS1 greater than or equal to 100% and ACE does not exceed BAAL more than 30 consecu ve
minutes.
D. CPS1 greater than or equal to 90% and ACE does not exceed BAAL more than 30 consecu ve
minutes. - C. CPS1 greater than or equal to 100% and ACE does not exceed BAAL more than 30
consecu ve minutes.
What should a Balancing Authority set Scheduled Frequency to for a slow Time Error
Correc on?
A. 60.02 Hz
B. 59.98 Hz
C. 59.80 Hz
D. 60.20 Hz - A. 60.02 Hz
Which of the following is a poten al source of Con ngency Reserve?
1. Offline genera on that takes 10 minutes to start and ramp to full output
2. Online genera on at full load
3. Controllable load resources
4. Voltage reduc ons
A. 3 and 4
B. 2 and 3
