NERC TOP System Operations Examination - Version 3
Comprehensive 150-Question Multiple-Choice Test Bank
Advanced / Expert / Mixed Difficulty Level
Target Audience: Experienced Transmission Operators, NERC
Certification Candidates, and System Operations Professionals
EXAM TITLE: NERC Transmission Operator (TOP) System
Operations Certification Examination – Advanced Mastery
Assessment of Reliability Standards, Real-Time Operations,
Contingency Analysis, Voltage Control, Emergency Procedures,
Interconnection Reliability Coordination, and Bulk Electric
System Operational Excellence for Senior System Operators
Section 1: TOP Core Responsibilities, Authority, and Governance
(Questions 1-15)
1. According to NERC TOP-001-4, the primary purpose of Transmission Operations standards
is to prevent which of the following adverse impacts to the Interconnection?
A) Economic inefficiency and market manipulation
B) Instability, uncontrolled separation, or Cascading outages
C) Transmission congestion and revenue inadequacy
D) Generation fuel supply shortages
Correct Answer: B
Rationale: TOP-001-4 explicitly states its purpose is "To prevent instability, uncontrolled
separation, or Cascading outages that adversely impact the reliability of the Interconnection by
,ensuring prompt action to prevent or mitigate such occurrences."
2. A Transmission Operator must maintain documented evidence of its compliance activities.
Which of the following is NOT explicitly listed as acceptable evidence under TOP-001-4?
A) Dated operator logs
B) Dated records
C) Energy Management System description documents
D) Financial audit reports
Correct Answer: D
Rationale: TOP-001-4 requires evidence including dated operator logs, dated records, and
Energy Management System description documents. Financial audit reports are not specified
as compliance evidence for transmission operations.
3. Which entity bears the ultimate responsibility for establishing Interconnection Reliability
Operating Limits (IROLs) for its Reliability Coordinator Area?
A) The Transmission Operator
B) The Balancing Authority
C) The Reliability Coordinator
D) The Transmission Planner
Correct Answer: C
Rationale: FAC-014-3 Requirement R1 specifies that "Each Reliability Coordinator shall establish
Interconnection Reliability Operating Limits (IROLs) for its Reliability Coordinator Area in
accordance with its System Operating Limit methodology."
4. A TOP's Operating Plan, as defined in NERC standards, references processes and
procedures that are:
,A) Updated only after major disturbance events
B) Valid only for the current operating day
C) Available to the System Operator on a daily basis
D) Subject to FERC pre-approval before implementation
Correct Answer: C
Rationale: An Operating Plan references processes and procedures, including electronic data
exchange, which are available to the System Operator on a daily basis to allow the operator to
reliably address conditions which may arise throughout the day.
5. Under TOP-001-4, a Transmission Operator is required to monitor non-BES facilities under
which circumstances?
A) Never; only BES facilities require monitoring
B) When necessary for determining System Operating Limit exceedances
C) Only during declared emergencies
D) Only when directed by the Reliability Coordinator
Correct Answer: B
Rationale: TOP-001-4 Requirement R10 requires the Transmission Operator to monitor non-
BES facilities for determining System Operating Limit exceedances within its Transmission
Operator Area.
6. Which of the following best describes the relationship between a Transmission Operator
and a Reliability Coordinator during an IROL violation?
A) The TOP must wait for RC approval before taking any corrective action
B) The TOP must take immediate corrective action and inform the RC of actions taken
C) The RC has exclusive authority to direct all corrective actions
D) The TOP may defer action until the next operating period
Correct Answer: B
, Rationale: Each Transmission Operator shall inform its Reliability Coordinator of actions taken
to return the System to within limits when a SOL has been exceeded.
7. A Transmission Operator that fails to distribute its data specification(s) to the required
number of reliability entities may be subject to enforcement action. The threshold for
violation is failure to distribute to:
A) One entity
B) Three entities, or more than 15% of reliability entities, whichever is greater
C) Five entities regardless of percentage
D) All entities within its area
Correct Answer: B
Rationale: The Transmission Operator did not distribute its Specification(s) to three entities, or
more than 15% of the reliability entities, whichever is greater, that have data and information
required by the Transmission Operator's Operational Planning Analyses.
8. The NERC Glossary defines a System Operating Limit (SOL) as:
A) The maximum current carrying capacity of a transmission line
B) The value that satisfies the most limiting of the prescribed operating criteria for a specified
system configuration
C) The minimum voltage required for stable operation
D) The maximum frequency deviation allowed
Correct Answer: B
Rationale: An SOL is "The value (such as MW, MVar, Amperes, Frequency, or Volts) that satisfies
the most limiting of the prescribed operating criteria for a specified system configuration to
ensure operation within acceptable reliability criteria."
Comprehensive 150-Question Multiple-Choice Test Bank
Advanced / Expert / Mixed Difficulty Level
Target Audience: Experienced Transmission Operators, NERC
Certification Candidates, and System Operations Professionals
EXAM TITLE: NERC Transmission Operator (TOP) System
Operations Certification Examination – Advanced Mastery
Assessment of Reliability Standards, Real-Time Operations,
Contingency Analysis, Voltage Control, Emergency Procedures,
Interconnection Reliability Coordination, and Bulk Electric
System Operational Excellence for Senior System Operators
Section 1: TOP Core Responsibilities, Authority, and Governance
(Questions 1-15)
1. According to NERC TOP-001-4, the primary purpose of Transmission Operations standards
is to prevent which of the following adverse impacts to the Interconnection?
A) Economic inefficiency and market manipulation
B) Instability, uncontrolled separation, or Cascading outages
C) Transmission congestion and revenue inadequacy
D) Generation fuel supply shortages
Correct Answer: B
Rationale: TOP-001-4 explicitly states its purpose is "To prevent instability, uncontrolled
separation, or Cascading outages that adversely impact the reliability of the Interconnection by
,ensuring prompt action to prevent or mitigate such occurrences."
2. A Transmission Operator must maintain documented evidence of its compliance activities.
Which of the following is NOT explicitly listed as acceptable evidence under TOP-001-4?
A) Dated operator logs
B) Dated records
C) Energy Management System description documents
D) Financial audit reports
Correct Answer: D
Rationale: TOP-001-4 requires evidence including dated operator logs, dated records, and
Energy Management System description documents. Financial audit reports are not specified
as compliance evidence for transmission operations.
3. Which entity bears the ultimate responsibility for establishing Interconnection Reliability
Operating Limits (IROLs) for its Reliability Coordinator Area?
A) The Transmission Operator
B) The Balancing Authority
C) The Reliability Coordinator
D) The Transmission Planner
Correct Answer: C
Rationale: FAC-014-3 Requirement R1 specifies that "Each Reliability Coordinator shall establish
Interconnection Reliability Operating Limits (IROLs) for its Reliability Coordinator Area in
accordance with its System Operating Limit methodology."
4. A TOP's Operating Plan, as defined in NERC standards, references processes and
procedures that are:
,A) Updated only after major disturbance events
B) Valid only for the current operating day
C) Available to the System Operator on a daily basis
D) Subject to FERC pre-approval before implementation
Correct Answer: C
Rationale: An Operating Plan references processes and procedures, including electronic data
exchange, which are available to the System Operator on a daily basis to allow the operator to
reliably address conditions which may arise throughout the day.
5. Under TOP-001-4, a Transmission Operator is required to monitor non-BES facilities under
which circumstances?
A) Never; only BES facilities require monitoring
B) When necessary for determining System Operating Limit exceedances
C) Only during declared emergencies
D) Only when directed by the Reliability Coordinator
Correct Answer: B
Rationale: TOP-001-4 Requirement R10 requires the Transmission Operator to monitor non-
BES facilities for determining System Operating Limit exceedances within its Transmission
Operator Area.
6. Which of the following best describes the relationship between a Transmission Operator
and a Reliability Coordinator during an IROL violation?
A) The TOP must wait for RC approval before taking any corrective action
B) The TOP must take immediate corrective action and inform the RC of actions taken
C) The RC has exclusive authority to direct all corrective actions
D) The TOP may defer action until the next operating period
Correct Answer: B
, Rationale: Each Transmission Operator shall inform its Reliability Coordinator of actions taken
to return the System to within limits when a SOL has been exceeded.
7. A Transmission Operator that fails to distribute its data specification(s) to the required
number of reliability entities may be subject to enforcement action. The threshold for
violation is failure to distribute to:
A) One entity
B) Three entities, or more than 15% of reliability entities, whichever is greater
C) Five entities regardless of percentage
D) All entities within its area
Correct Answer: B
Rationale: The Transmission Operator did not distribute its Specification(s) to three entities, or
more than 15% of the reliability entities, whichever is greater, that have data and information
required by the Transmission Operator's Operational Planning Analyses.
8. The NERC Glossary defines a System Operating Limit (SOL) as:
A) The maximum current carrying capacity of a transmission line
B) The value that satisfies the most limiting of the prescribed operating criteria for a specified
system configuration
C) The minimum voltage required for stable operation
D) The maximum frequency deviation allowed
Correct Answer: B
Rationale: An SOL is "The value (such as MW, MVar, Amperes, Frequency, or Volts) that satisfies
the most limiting of the prescribed operating criteria for a specified system configuration to
ensure operation within acceptable reliability criteria."
