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NERC System Operator newest Exam with verified answers

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NERC System Operator newest Exam with verified answers

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NERC
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NERC

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Uploaded on
April 1, 2025
Number of pages
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Written in
2024/2025
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NERC System Operator newest Exam
with verified answers

Power equation - correct answer ✔P=IV; power (watts)=current (amps) x
y y y y y y y y y y


voltage (volts) y




Power equation three phase - correct answer ✔Power=Voltage (v) x Current
y y y y y y y y y y y


(I) x 1.73 x Power Factor (PF)
y y y y y y




If operating reserve gradually decreases throughout the hour, it's because
y y y y y y y y y y


___. - correct answer ✔Incorrect load forecast
y y y y y y




Operating reserves are made up of ___ and ___. - correct answer
y y y y y y y y y y y y


✔Regulating Reserves and Contingency Reserve y y y y




What type of reserves are used for AGC? - correct answer ✔Regulating
y y y y y y y y y y y




A BA's MSSC is usually its ___. - correct answer ✔Largest Generator
y y y y y y y y y y y




Equation to determine speed in RPM of a Generator? - correct answer
y y y y y y y y y y y y


✔7200/# of poles y y




At what frequency will a generator trip on underfrequency? - correct answer
y y y y y y y y y y y y


✔57.5 Hz y

,Why do we have underfrequency tripping? - correct answer ✔Protect
y y y y y y y y y y


turbines from damage y y




Why does frequency drop faster/is harder to correct, when we have a
y y y y y y y y y y y y


disturbance when we have increased wind generation? - correct answer
y y y y y y y y y y


✔Less inertia/governor response to correct frequency
y y y y y




Frequency above 60 Hz means ___. - correct answer ✔Overgenerating
y y y y y y y y y




Frequency below 60 Hz means ___. - correct answer ✔Undergenerating
y y y y y y y y y




Frequency decrease is usually caused by ___. - correct answer ✔Loss of
y y y y y y y y y y y y


generation


A 1% drop in frequency results in ___. - correct answer ✔2% drop in total
y y y y y y y y y y y y y y y


load; 3% drop in motor load
y y y y y




Formula for ACE? - correct answer ✔NIa-NIs -10B(Fa-Fs)
y y y y y y y




Governor response is based on its ___ characteristic. - correct answer
y y y y y y y y y y y


✔Droop


5% of 60 Hz= - correct answer ✔3 Hz; most Governor's have 5% droop
y y y y y y y y y y y y y y


characteristic


Droop setting is the % required for a generator to run at ___ capacity. -
y y y y y y y y y y y y y y y


correct answer ✔Full y y

, What is the purpose of a governor deadband? - correct answer ✔Minimize
y y y y y y y y y y y y


wear on equipment
y y




What % for governor deadband? - correct answer ✔+/- .036 Hz
y y y y y y y y y y




An isochrynous generator setting has ___ droop. - correct answer ✔0%
y y y y y y y y y y




When are isochryonous generators used? - correct answer ✔one unit, during
y y y y y y y y y y y


islanding


Is 10% droop or 5% droop more responsive? - correct answer ✔5%
y y y y y y y y y y y




On a classic disturbance chart, what brings frequency from point c to d? -
y y y y y y y y y y y y y y


correct answer ✔Contingency Reserve
y y y




On a classic disturbance chart, what causes a 'step' change? - correct answer
y y y y y y y y y y y y y


✔Fast-start generator y




What's the primary response to frequency drop? - correct answer ✔Governor
y y y y y y y y y y


response
y




Examples of asynchronous generation? - correct answer ✔Solar, wind
y y y y y y y y




What happens to load with increased behind-the-meter generation? - correct
y y y y y y y y y y


answer ✔Peaks later in the day; duck curve
y y y y y y y

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