KNOWN NERC EXAM QUESTIONS ACTUAL
QUESTIONS AND ANSWERS LATEST
UPDATED 2026
When two identical generating units are operated in parallel on
governor control, and on machine has a 5% droop and the other
has a 10% droop, the unit with the greater (10%) governor droop
will:
a) Respond less to frequency deviations
b) Respond more to frequency deviations
c) Respond the same to frequency deviations
d) Not adjust for frequency changes Correct Answer a) Respond
less to frequency deviations
On a radial transmission system a generator has a capacity of
600 MWs. The Droop characteristic is at 5% and the generator is
currently loaded at 300 MWs. If frequency suddenly drops to 59.3
Hz, what would be the total generator output?
a) 350
b) 400
c) 440
, d) 600 Correct Answer c) 440
What is the main purpose of the Frequency Bias Setting in the
ACE equation?
a) Control frequency to 60 Hz for the entire Interconnection
b) Assist with arresting frequency deviations
c) Restore frequency to 60 Hz after a disturbance
d) maintains frequency between 59.95 and 60.05 Hz Correct
Answer b) Assist with arresting frequency deviations
A Balancing Authority has a Frequency Bias Setting of -200
MW/.1Hz. What is the Balancing Authority's Frequency Response
for a frequency of 59.95 Hz?
a) 10 MWs
b) 50 MWs
c) 100 MWs
d) 200 MWs Correct Answer c) 100 MWs
Scheduled Interchange is 250 MWs and Actual Interchange is 285
MWs. The Bias Setting is 35 MW/.1Hz and frequency is 60.00 Hz
with no time error correction in effect. Frequency suddenly drops
to 59.80 Hz. What does ACE indicate after the disturbance?
QUESTIONS AND ANSWERS LATEST
UPDATED 2026
When two identical generating units are operated in parallel on
governor control, and on machine has a 5% droop and the other
has a 10% droop, the unit with the greater (10%) governor droop
will:
a) Respond less to frequency deviations
b) Respond more to frequency deviations
c) Respond the same to frequency deviations
d) Not adjust for frequency changes Correct Answer a) Respond
less to frequency deviations
On a radial transmission system a generator has a capacity of
600 MWs. The Droop characteristic is at 5% and the generator is
currently loaded at 300 MWs. If frequency suddenly drops to 59.3
Hz, what would be the total generator output?
a) 350
b) 400
c) 440
, d) 600 Correct Answer c) 440
What is the main purpose of the Frequency Bias Setting in the
ACE equation?
a) Control frequency to 60 Hz for the entire Interconnection
b) Assist with arresting frequency deviations
c) Restore frequency to 60 Hz after a disturbance
d) maintains frequency between 59.95 and 60.05 Hz Correct
Answer b) Assist with arresting frequency deviations
A Balancing Authority has a Frequency Bias Setting of -200
MW/.1Hz. What is the Balancing Authority's Frequency Response
for a frequency of 59.95 Hz?
a) 10 MWs
b) 50 MWs
c) 100 MWs
d) 200 MWs Correct Answer c) 100 MWs
Scheduled Interchange is 250 MWs and Actual Interchange is 285
MWs. The Bias Setting is 35 MW/.1Hz and frequency is 60.00 Hz
with no time error correction in effect. Frequency suddenly drops
to 59.80 Hz. What does ACE indicate after the disturbance?
