NERC OPERATIONS REAL EXAM
QUESTIONS AND 100% VERIFIED
CORRECT ANSWERS. COMPLETE SET
WITH OVER 120 ITEMS.GRADED A+
- QUESTION- When a large generator on an Interconnection trips off line, the
____________ of the Interconnection ____________.
A) frequency; drops
B) transformer temperature; drops
C) AVRs; drops
D) voltage; increases - ANSWER -frequency; drops
- QUESTION- Choose the answer that best describes the operation of a rotor.
A) The stationary part of the transmission system.
B) A type of superconductor.
,C) The stationary element of a generator that has its windings connected to the
system.
D) The excited (energized) field winding that rotates inside the stator to induce
current into the stator windings. - ANSWER -The excited (energized) field
winding that rotates inside the stator to induce current into the stator windings.
- QUESTION- In a system that is more capacitive than inductive, the current sine
wave will ______ the voltage sine wave with tends to ___________ voltage.
A) lag; raise
B) lead; raise
C) lead; lower
D) lag; lower - ANSWER -lead; raise
- QUESTION- Sustained operation with a power angle or torque angle above
______ can lead to system instability.
A) 10 degrees
B) 90 degrees
C) 120 degrees
D) 360 degrees - ANSWER -90 degrees
,- QUESTION- Which of the following conditions may cause transient instability in
the power system?
A) When the power angle increases to 90 degrees or more.
B) When a disturbance causes momentary power angle excursions greater than 90
degrees.
C) When heavy power transfers occur in the system, such as when there is a loss in
generation.
D) All of the above - ANSWER -All of the above At what torque angle of
operation does power typically begin to flow from the generator to the system?
A) 90 degrees
B) 60 degrees
C) 30 degrees
D) 10 degrees - ANSWER -10 degrees
- QUESTION- Which of the following is a method that Reliability Coordinators
and Balancing Authorities may use to manage transmission outages?
, A) Coordinate and adhere to voltage schedules to minimize reactive power flow.
B) Optimize the use of Load Tap Changer transformers, capacitors, and reactors.
C) Verify voltage control equipment are on automatic to supply the required
voltage support.
D) All of the above - ANSWER -All of the above
- QUESTION- A(n) ___________ is the value that satisfies the most limiting of
the prescribed operating criteria for a specified system configuration to ensure
operation within acceptable reliability criteria.
A) System Operating Limit
B) Circuit Overload
C) System Overload Limit
D) Interconnection Reliability Operating Limits - ANSWER -System Operating
Limit
- QUESTION- Generator ratings specify the __________ and ___________ at
which they can operate safely.
QUESTIONS AND 100% VERIFIED
CORRECT ANSWERS. COMPLETE SET
WITH OVER 120 ITEMS.GRADED A+
- QUESTION- When a large generator on an Interconnection trips off line, the
____________ of the Interconnection ____________.
A) frequency; drops
B) transformer temperature; drops
C) AVRs; drops
D) voltage; increases - ANSWER -frequency; drops
- QUESTION- Choose the answer that best describes the operation of a rotor.
A) The stationary part of the transmission system.
B) A type of superconductor.
,C) The stationary element of a generator that has its windings connected to the
system.
D) The excited (energized) field winding that rotates inside the stator to induce
current into the stator windings. - ANSWER -The excited (energized) field
winding that rotates inside the stator to induce current into the stator windings.
- QUESTION- In a system that is more capacitive than inductive, the current sine
wave will ______ the voltage sine wave with tends to ___________ voltage.
A) lag; raise
B) lead; raise
C) lead; lower
D) lag; lower - ANSWER -lead; raise
- QUESTION- Sustained operation with a power angle or torque angle above
______ can lead to system instability.
A) 10 degrees
B) 90 degrees
C) 120 degrees
D) 360 degrees - ANSWER -90 degrees
,- QUESTION- Which of the following conditions may cause transient instability in
the power system?
A) When the power angle increases to 90 degrees or more.
B) When a disturbance causes momentary power angle excursions greater than 90
degrees.
C) When heavy power transfers occur in the system, such as when there is a loss in
generation.
D) All of the above - ANSWER -All of the above At what torque angle of
operation does power typically begin to flow from the generator to the system?
A) 90 degrees
B) 60 degrees
C) 30 degrees
D) 10 degrees - ANSWER -10 degrees
- QUESTION- Which of the following is a method that Reliability Coordinators
and Balancing Authorities may use to manage transmission outages?
, A) Coordinate and adhere to voltage schedules to minimize reactive power flow.
B) Optimize the use of Load Tap Changer transformers, capacitors, and reactors.
C) Verify voltage control equipment are on automatic to supply the required
voltage support.
D) All of the above - ANSWER -All of the above
- QUESTION- A(n) ___________ is the value that satisfies the most limiting of
the prescribed operating criteria for a specified system configuration to ensure
operation within acceptable reliability criteria.
A) System Operating Limit
B) Circuit Overload
C) System Overload Limit
D) Interconnection Reliability Operating Limits - ANSWER -System Operating
Limit
- QUESTION- Generator ratings specify the __________ and ___________ at
which they can operate safely.
