KNOWN NERC EXAM QUESTIONS WITH COMPLETE
SOLUTIONS
A 50 MVA generator is currently producing 40 MWs and 10
MVARs. What are the dynamic reactive reserves currently on
this generator?
a) 50
b) 30
c) 0
d) 20 Correct Answer d) 20
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
A Balancing Authority is scheduled to receive 300 MWs from
the north and 400 MWs from the south for hour ending 1300.
The north schedule is curtailed starting at 1220 with a 10-minute
ramp. What is the Net Interchange for the hour?
a) 450 MWh
b) 500 MWh
c) 550 MWh
d) 600 MWh Correct Answer b) 500 MWh
, A Balancing Authority notices that Operating Reserve has
steadily declined throughout the hour. What is the most likely
cause?
a) Loss of a large generator in the area
b) An inaccurate load forecast
c) Loss of a major transmission line
d) A malfunction of EMS Correct Answer b) An inaccurate
load forecast
A Balancing Authority receives an Operating Instruction from
its Reliability Coordinator. The Balancing Authority must
comply with the Operating Instruction unless:
a) It results in separation from the Interconnection
b) The Balancing Authority disagrees with it
c) Has serious financial implications
d) Results in danger Correct Answer d) Results in danger
A contingency results in the exceedence of an IROL. What
could be the result if the IROL is allowed to be exceeded longer
than its Tv?
a) Loss of power to a local area
b) The transmission line could fail
c) Protective relays could fail
d) Interruption of power to a large part of the BES Correct
Answer d) Interruption of power to a large part of the BES
A study shows that a single contingency would result in an
IROL violation and the corrective action would require opening
SOLUTIONS
A 50 MVA generator is currently producing 40 MWs and 10
MVARs. What are the dynamic reactive reserves currently on
this generator?
a) 50
b) 30
c) 0
d) 20 Correct Answer d) 20
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
A Balancing Authority is scheduled to receive 300 MWs from
the north and 400 MWs from the south for hour ending 1300.
The north schedule is curtailed starting at 1220 with a 10-minute
ramp. What is the Net Interchange for the hour?
a) 450 MWh
b) 500 MWh
c) 550 MWh
d) 600 MWh Correct Answer b) 500 MWh
, A Balancing Authority notices that Operating Reserve has
steadily declined throughout the hour. What is the most likely
cause?
a) Loss of a large generator in the area
b) An inaccurate load forecast
c) Loss of a major transmission line
d) A malfunction of EMS Correct Answer b) An inaccurate
load forecast
A Balancing Authority receives an Operating Instruction from
its Reliability Coordinator. The Balancing Authority must
comply with the Operating Instruction unless:
a) It results in separation from the Interconnection
b) The Balancing Authority disagrees with it
c) Has serious financial implications
d) Results in danger Correct Answer d) Results in danger
A contingency results in the exceedence of an IROL. What
could be the result if the IROL is allowed to be exceeded longer
than its Tv?
a) Loss of power to a local area
b) The transmission line could fail
c) Protective relays could fail
d) Interruption of power to a large part of the BES Correct
Answer d) Interruption of power to a large part of the BES
A study shows that a single contingency would result in an
IROL violation and the corrective action would require opening
