NERC SYSTEM OPERATOR EXAM PREP EXAM 2026
NEWEST ACTUAL EXAM COMPLETE 230 QUESTIONS
WITH DETAILED VERIFIED ANSWERS
(100% CORRECT ANSWERS) /ALREADY GRADED A+
What is the purpose of a governor deadband? - CORRECT ANSWER ✔✔- Minimize
wear on equipment
What % for governor deadband? - CORRECT ANSWER ✔✔- +/- .036 Hz
An isochrynous generator setting has ___ droop. - CORRECT ANSWER ✔✔- 0%
When are isochryonous generators used? - CORRECT ANSWER ✔✔- one unit,
during islanding
Is 10% droop or 5% droop more responsive? - CORRECT ANSWER ✔✔- 5%
On a classic disturbance chart, what brings frequency from point c to d? -
CORRECT ANSWER ✔✔- Contingency Reserve
On a classic disturbance chart, what causes a 'step' change? - CORRECT ANSWER
✔✔- Fast-start generator
1|Page
,What's the primary response to frequency drop? - CORRECT ANSWER ✔✔-
Governor response
Examples of asynchronous generation? - CORRECT ANSWER ✔✔- Solar, wind
What happens to load with increased behind-the-meter generation? - CORRECT
ANSWER ✔✔- Peaks later in the day; duck curve
MWs flowing into a BA are - or +? - CORRECT ANSWER ✔✔- Negative
If you lose a 500 MW generator in your BA, your ACE ___. - CORRECT ANSWER
✔✔- Decreases by 500 MW
What part of the ACE equation is always negative? - CORRECT ANSWER ✔✔-
Frequency Bias
Power equation - CORRECT ANSWER ✔✔- P=IV; power (watts)=current (amps) x
voltage (volts)
Power equation three phase - CORRECT ANSWER ✔✔- Power=Voltage (v) x
Current (I) x 1.73 x Power Factor (PF)
If operating reserve gradually decreases throughout the hour, it's because ___. -
CORRECT ANSWER ✔✔- Incorrect load forecast
2|Page
, Operating reserves are made up of ___ and ___. - CORRECT ANSWER ✔✔-
Regulating Reserves and Contingency Reserve
What type of reserves are used for AGC? - CORRECT ANSWER ✔✔- Regulating
A BA's MSSC is usually its ___. - CORRECT ANSWER ✔✔- Largest Generator
Equation to determine speed in RPM of a Generator? - CORRECT ANSWER ✔✔-
7200/# of poles
At what frequency will a generator trip on underfrequency? - CORRECT ANSWER
✔✔- 57.5 Hz
Why do we have underfrequency tripping? - CORRECT ANSWER ✔✔- Protect
turbines from damage
Why does frequency drop faster/is harder to correct, when we have a disturbance
when we have increased wind generation? - CORRECT ANSWER ✔✔- Less
inertia/governor response to correct frequency
Frequency above 60 Hz means ___. - CORRECT ANSWER ✔✔- Overgenerating
Frequency below 60 Hz means ___. - CORRECT ANSWER ✔✔- Undergenerating
Frequency decrease is usually caused by ___. - CORRECT ANSWER ✔✔- Loss of
generation
3|Page
NEWEST ACTUAL EXAM COMPLETE 230 QUESTIONS
WITH DETAILED VERIFIED ANSWERS
(100% CORRECT ANSWERS) /ALREADY GRADED A+
What is the purpose of a governor deadband? - CORRECT ANSWER ✔✔- Minimize
wear on equipment
What % for governor deadband? - CORRECT ANSWER ✔✔- +/- .036 Hz
An isochrynous generator setting has ___ droop. - CORRECT ANSWER ✔✔- 0%
When are isochryonous generators used? - CORRECT ANSWER ✔✔- one unit,
during islanding
Is 10% droop or 5% droop more responsive? - CORRECT ANSWER ✔✔- 5%
On a classic disturbance chart, what brings frequency from point c to d? -
CORRECT ANSWER ✔✔- Contingency Reserve
On a classic disturbance chart, what causes a 'step' change? - CORRECT ANSWER
✔✔- Fast-start generator
1|Page
,What's the primary response to frequency drop? - CORRECT ANSWER ✔✔-
Governor response
Examples of asynchronous generation? - CORRECT ANSWER ✔✔- Solar, wind
What happens to load with increased behind-the-meter generation? - CORRECT
ANSWER ✔✔- Peaks later in the day; duck curve
MWs flowing into a BA are - or +? - CORRECT ANSWER ✔✔- Negative
If you lose a 500 MW generator in your BA, your ACE ___. - CORRECT ANSWER
✔✔- Decreases by 500 MW
What part of the ACE equation is always negative? - CORRECT ANSWER ✔✔-
Frequency Bias
Power equation - CORRECT ANSWER ✔✔- P=IV; power (watts)=current (amps) x
voltage (volts)
Power equation three phase - CORRECT ANSWER ✔✔- Power=Voltage (v) x
Current (I) x 1.73 x Power Factor (PF)
If operating reserve gradually decreases throughout the hour, it's because ___. -
CORRECT ANSWER ✔✔- Incorrect load forecast
2|Page
, Operating reserves are made up of ___ and ___. - CORRECT ANSWER ✔✔-
Regulating Reserves and Contingency Reserve
What type of reserves are used for AGC? - CORRECT ANSWER ✔✔- Regulating
A BA's MSSC is usually its ___. - CORRECT ANSWER ✔✔- Largest Generator
Equation to determine speed in RPM of a Generator? - CORRECT ANSWER ✔✔-
7200/# of poles
At what frequency will a generator trip on underfrequency? - CORRECT ANSWER
✔✔- 57.5 Hz
Why do we have underfrequency tripping? - CORRECT ANSWER ✔✔- Protect
turbines from damage
Why does frequency drop faster/is harder to correct, when we have a disturbance
when we have increased wind generation? - CORRECT ANSWER ✔✔- Less
inertia/governor response to correct frequency
Frequency above 60 Hz means ___. - CORRECT ANSWER ✔✔- Overgenerating
Frequency below 60 Hz means ___. - CORRECT ANSWER ✔✔- Undergenerating
Frequency decrease is usually caused by ___. - CORRECT ANSWER ✔✔- Loss of
generation
3|Page
