NERC RC PREPARATION LATEST ACTUAL EXAM
WITH VERIFIED QUESTIONS & CORRECT
ANSWERS
Question 1.
Power equation
ANSWER
P=IV; power (watts)=current (amps) x voltage (volts)
Question 2.
Power equation three phase
ANSWER
Power=Voltage (v) x Current (I) x 1.73 x Power Factor (PF)
Question 3.
If operating reserve gradually decreases throughout the hour, it's because ___.
ANSWER
Incorrect load forecast
Question 4.
Operating reserves are made up of ___ and ___.
ANSWER
Regulating Reserves and Contingency Reserve
Question 5.
What type of reserves are used for AGC?
ANSWER
Regulating
,Question 6.
A BA's MSSC is usually its ___.
ANSWER
Largest Generator
Question 7.
Equation to determine speed in RPM of a Generator?
ANSWER
7200/# of poles
Question 8.
At what frequency will a generator trip on underfrequency?
ANSWER
57.5 Hz
Question 9.
Why do we have underfrequency tripping?
ANSWER
Protect turbines from damage
Question 10.
Why does frequency drop faster/is harder to correct, when we have a disturbance when we have
increased wind generation?
ANSWER
Less inertia/governor response to correct frequency
,Question 11.
Frequency above 60 Hz means ___.
ANSWER
Overgenerating
Question 12.
Frequency below 60 Hz means ___.
ANSWER
Undergenerating
Question 13.
Frequency decrease is usually caused by ___.
ANSWER
Loss of generation
Question 14.
A 1% drop in frequency results in ___.
ANSWER
2% drop in total load; 3% drop in motor load
Question 15.
Formula for ACE?
ANSWER
NIa-NIs -10B(Fa-Fs)
Question 16.
Governor response is based on its ___ characteristic.
ANSWER
Droop
, Question 17.
How does a 5% governor droop setting affect frequency control on a 60‑Hz system?
ANSWER
3 Hz change; most Governors have 5% droop characteristic
Question 18.
Droop setting is the % required for a generator to run at ___ capacity.
ANSWER
Full
Question 19.
What is the purpose of a governor deadband?
ANSWER
Minimize wear on equipment
Question 20.
What % for governor deadband?
ANSWER
+/- .036 Hz (the governor
will not respond to frequency changes smaller than 0.036 Hz)
Question 21.
An isochrynous generator setting has ___ droop.
ANSWER
0%
WITH VERIFIED QUESTIONS & CORRECT
ANSWERS
Question 1.
Power equation
ANSWER
P=IV; power (watts)=current (amps) x voltage (volts)
Question 2.
Power equation three phase
ANSWER
Power=Voltage (v) x Current (I) x 1.73 x Power Factor (PF)
Question 3.
If operating reserve gradually decreases throughout the hour, it's because ___.
ANSWER
Incorrect load forecast
Question 4.
Operating reserves are made up of ___ and ___.
ANSWER
Regulating Reserves and Contingency Reserve
Question 5.
What type of reserves are used for AGC?
ANSWER
Regulating
,Question 6.
A BA's MSSC is usually its ___.
ANSWER
Largest Generator
Question 7.
Equation to determine speed in RPM of a Generator?
ANSWER
7200/# of poles
Question 8.
At what frequency will a generator trip on underfrequency?
ANSWER
57.5 Hz
Question 9.
Why do we have underfrequency tripping?
ANSWER
Protect turbines from damage
Question 10.
Why does frequency drop faster/is harder to correct, when we have a disturbance when we have
increased wind generation?
ANSWER
Less inertia/governor response to correct frequency
,Question 11.
Frequency above 60 Hz means ___.
ANSWER
Overgenerating
Question 12.
Frequency below 60 Hz means ___.
ANSWER
Undergenerating
Question 13.
Frequency decrease is usually caused by ___.
ANSWER
Loss of generation
Question 14.
A 1% drop in frequency results in ___.
ANSWER
2% drop in total load; 3% drop in motor load
Question 15.
Formula for ACE?
ANSWER
NIa-NIs -10B(Fa-Fs)
Question 16.
Governor response is based on its ___ characteristic.
ANSWER
Droop
, Question 17.
How does a 5% governor droop setting affect frequency control on a 60‑Hz system?
ANSWER
3 Hz change; most Governors have 5% droop characteristic
Question 18.
Droop setting is the % required for a generator to run at ___ capacity.
ANSWER
Full
Question 19.
What is the purpose of a governor deadband?
ANSWER
Minimize wear on equipment
Question 20.
What % for governor deadband?
ANSWER
+/- .036 Hz (the governor
will not respond to frequency changes smaller than 0.036 Hz)
Question 21.
An isochrynous generator setting has ___ droop.
ANSWER
0%
