NERC RC EXAM ACTUAL EXAM 2026 | NORTH AMERICAN ELECTRIC
RELIABILITY CORPORATION (NERC) | RELIABILITY OPERATOR
CERTIFICATION (RC) EXAM | UPDATED VERSION | VERIFIED ANSWERS
A Balancing Authority's EMS has failed and been unable to calculate
ACE for 2 hours. This is he 5th time since the first of the year. NERC
Standard BAL-005 requires the system for calculating Reporting ACE be
available for what percentage of a calendar year?
A. 100%
B. 99.5%
C. 95%
D. 99.95% ---------CORRECT ANSWER-----------------B. 99.5%
The change in a balancing area's supply and demand following a sudden
loss of load or generation within the Balancing Authority's boundaries,
results in a sudden change in that Balancing Authority's _________.
A. ACE
B. CPSI score
C. Frequency Bias Setting
D. Contingency reserves ---------CORRECT ANSWER-----------------A. ACE
,If any entity involved in a transaction does not actively deny the
Arranged Interchange within the required timeframe, the Interchange
is transitioned to which status?
A. Confirmed status
B. Pending status
C. Ramping status
D. Denied status ---------CORRECT ANSWER-----------------A. Confirmed
status
Protective relays used on transmission and distribution systems are
designed to...
A. protect power marketers from losing money by letting them know
when a problem arises on the system.
B. minimize damage and isolate problems on the system.
C. keep all lines in service no matter what happens on the system.
D. Keep all generators on line no matter what the circumstances ---------
CORRECT ANSWER-----------------B. minimize damage and isolate
problems on the system.
,As a result of high MW flows, a transmission line sags significantly and
current flashes over to a tree growing directly below it. This causes the
protective relays to take the transmission line out of service. How
would you classify this type of fault?
A. Overvoltage fault
B. Differential fault
C. Ground fault
D. Positive sequence fault ---------CORRECT ANSWER-----------------C.
Ground fault
A transformer differential zone has Circuit Breakers 624 and 634
protecting the transformer. Breaker 624 receives 1500 MVA and
Breaker 634 sends 1200 MVA to the bus. Based on these conditions,
determine which of the following statements is true.
A. There is a fault in the transformer.
B. The fault produces an extra secondary current, which flows to the
operating coil of the differential relay.
C. This fault conditions will cause all circuit breakers to open.
D. All of the above ---------CORRECT ANSWER-----------------D. All of the
above
, A relay controlling circuit breaker A detects a zone 2 fault outside its
line section. Normally, under this condition, the relay is designed to trip
circuit breaker A only it its zone 2 timer times out. However, in this
case, circuit breaker A trips at high speed. The tripping of circuit
breaker A would be classified as a ___________.
A. safety trip
B. normal trip
C. control trip
D. misoperation ---------CORRECT ANSWER-----------------D. misoperation
Communication signals are sometimes used to control how relays
respond to system conditions.
A. True
B. False ---------CORRECT ANSWER-----------------A. True
Where applicable, telecommunications facilities shall utilize different
infrastructure. Which of the following is also required of these
facilities?
A. State of the art
RELIABILITY CORPORATION (NERC) | RELIABILITY OPERATOR
CERTIFICATION (RC) EXAM | UPDATED VERSION | VERIFIED ANSWERS
A Balancing Authority's EMS has failed and been unable to calculate
ACE for 2 hours. This is he 5th time since the first of the year. NERC
Standard BAL-005 requires the system for calculating Reporting ACE be
available for what percentage of a calendar year?
A. 100%
B. 99.5%
C. 95%
D. 99.95% ---------CORRECT ANSWER-----------------B. 99.5%
The change in a balancing area's supply and demand following a sudden
loss of load or generation within the Balancing Authority's boundaries,
results in a sudden change in that Balancing Authority's _________.
A. ACE
B. CPSI score
C. Frequency Bias Setting
D. Contingency reserves ---------CORRECT ANSWER-----------------A. ACE
,If any entity involved in a transaction does not actively deny the
Arranged Interchange within the required timeframe, the Interchange
is transitioned to which status?
A. Confirmed status
B. Pending status
C. Ramping status
D. Denied status ---------CORRECT ANSWER-----------------A. Confirmed
status
Protective relays used on transmission and distribution systems are
designed to...
A. protect power marketers from losing money by letting them know
when a problem arises on the system.
B. minimize damage and isolate problems on the system.
C. keep all lines in service no matter what happens on the system.
D. Keep all generators on line no matter what the circumstances ---------
CORRECT ANSWER-----------------B. minimize damage and isolate
problems on the system.
,As a result of high MW flows, a transmission line sags significantly and
current flashes over to a tree growing directly below it. This causes the
protective relays to take the transmission line out of service. How
would you classify this type of fault?
A. Overvoltage fault
B. Differential fault
C. Ground fault
D. Positive sequence fault ---------CORRECT ANSWER-----------------C.
Ground fault
A transformer differential zone has Circuit Breakers 624 and 634
protecting the transformer. Breaker 624 receives 1500 MVA and
Breaker 634 sends 1200 MVA to the bus. Based on these conditions,
determine which of the following statements is true.
A. There is a fault in the transformer.
B. The fault produces an extra secondary current, which flows to the
operating coil of the differential relay.
C. This fault conditions will cause all circuit breakers to open.
D. All of the above ---------CORRECT ANSWER-----------------D. All of the
above
, A relay controlling circuit breaker A detects a zone 2 fault outside its
line section. Normally, under this condition, the relay is designed to trip
circuit breaker A only it its zone 2 timer times out. However, in this
case, circuit breaker A trips at high speed. The tripping of circuit
breaker A would be classified as a ___________.
A. safety trip
B. normal trip
C. control trip
D. misoperation ---------CORRECT ANSWER-----------------D. misoperation
Communication signals are sometimes used to control how relays
respond to system conditions.
A. True
B. False ---------CORRECT ANSWER-----------------A. True
Where applicable, telecommunications facilities shall utilize different
infrastructure. Which of the following is also required of these
facilities?
A. State of the art
