NERC Certification Exam Questions and Answers, Exams of Nursing

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QUESTION: If due to a reliability event, an interchange transaction must be modified, how long does the Sink Balancing Authority have to modify the tag? - ANSWER-withing 60 minutes of the start of modification QUESTION: What is an example of a disturbance that has caused you system to become islanded? - ANSWER-Frequency Fluctuations QUESTION: What is an instance is which you use manual load shedding? - ANSWER-Continuous decline in frequency QUESTION: What actions should be implemented during a EEA 2 - ANSWER-Schedule emergency assistance, recall all non-firm exports, start all available generation According to Nerc Standards, an emergency interchange transaction can be exempt from tagging if it is less than - ANSWER-60 minutes

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QUESTION: A BA or LSE that requests an EEA 3 must complete and EEA 3 report and submit it to the RC within how many days - ANSWER-2 business days QUESTION: During restoration efforts load pick-ups should not exceed percentage of synchronized generation capacity - ANSWER-5% QUESTION: What are the two components that a system operator should be aware of for controlling frequency during a system restoration if they are in an islanded situation - ANSWER- load and generation QUESTION: What system was put in place to provide RC's with a mechanism to handle energy deficiencies? - ANSWER-Energy Emergency Alerts QUESTION: What would be an appropriate situation for a system operator to shed load? - ANSWER-Transmission facility is overloaded, voltages are rapidly decaying, and no other situations are available

QUESTION: Which EEA is used to announce the change in transmission service priority? - ANSWER-EEA 2 QUESTION: Who is the only entity that can declare an EEA? - ANSWER- Reliability Coordinator QUESTION: Who must a system operator receive approval from to manually shed load? - ANSWER-No one QUESTION: Automatic load shedding schemes should consider the following 3 things.................................................................................................... .. - ANSWER-frequency, the rate of frequency decay, the rate of voltage decay QUESTION: Blackstart capabilities should be verified by------ANSWER-periodic testing QUESTION: Synchroscopes should be calibrated in------ANSWER-degrees QUESTION: What type of relay is relay 87? - ANSWER-Differential relay

QUESTION: If Ace is -50 before a disturbance it must return to - ANSWER-- 50 QUESTION: The disturbance recovery period is minutes after the start of of a reportable disturbance. - ANSWER- QUESTION: What are the 3 types of AGC? and what is AGC? - ANSWER- Constant Frequency, Constant Interchange, Tie-line Bias QUESTION: What type of relay is relay 21? - ANSWER-Distance relay QUESTION: Each BA shall operate its AGC on? - ANSWER-Tie-line frequency bias QUESTION: What type of relay is relay 64 - ANSWER-Ground relay QUESTION: If ACE is 50 before a disturbance it must return to - ANSWER- 0

QUESTION: The purpose of the is to detect abnormal system conditions and isolate fault condition to maintain reliability - ANSWER- protection system schemes QUESTION: the purpose is to ensure that responsible entities conduct a reliability assessment of each arranged interchange before it is implemented

• ANSWER-INT- QUESTION: How do you know when a fault is on the line? - ANSWER-When more power is leaving the transformer QUESTION: Which 6 things are updated every 10 minutes? - ANSWER- transmission data, generation data, operating reserves, balancing area demand, interchange, ACE&frequency QUESTION: Which EEA is a warning, and that you may be getting ready to put yourself in a situation. (no sales will be made) - ANSWER-EEA 1 QUESTION: Which EEA includes: public appeals, voltage reduction, interruption of non-firm - ANSWER-EEA 2

QUESTION: If you lost firm system demand for 15 minutes, and your peak load for the previous year was > 3000MW, what is the threshold for the reporting criteria to NERC? - ANSWER- 300MW QUESTION: DOE requires a report for a sustained voltage reduction that is greater than

• ANSWER-3% QUESTION: a final written report for a system disturbance that meets NERC criteria for reporting must be completed within - ANSWER- 60 days QUESTION: NERC requires that they be notified if a BA area loses firm load above a certain amount (depend on the size of a BA area) for what duration of time? - ANSWER-15 minutes QUESTION: a system voltage excursion of or greater must be reported to the NERC - ANSWER-10% QUESTION: The threshold for the amount of firm load MW that can be

shed for system reliability that requires a NERC and DOE report is - ANSWER-100MW

QUESTION: Who is responsible for submitting and updating the Request for Interchange associated with a Dynamic Transfer - ANSWER-Purchase Selling Entity QUESTION: The amount of frequency change that occurs before the governor starts to respond

• ANSWER-governor dead band QUESTION: Which of the following must BA's evaluate to determine if the Arranged Interchange should be confirmed? - ANSWER-Energy Profile, Scheduled Path Connectivity, Generator Ramping Capability QUESTION: Which of the following is required to be in the metered boundaries of a BA area - ANSWER-Generation, Load, Transmission QUESTION: A 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 - ANSWER-System Operating Limit

QUESTION: At what torque angle of operation does power typically begin to flow from the generator to the system? - ANSWER-10 degrees QUESTION: What is one of the criteria used to determine a System Operating Limit? - ANSWER- QUESTION: Which relay uses a combination of CT and PT measurements and operates when the ratio of the PT measurements to CT measurements is below a certain limit for a given time period. - ANSWER-Device 21 QUESTION: Each Generator Operator shall coordinate all new protective systems and all protective system changes with whom? - ANSWER- Transmission Operator and Host BA QUESTION: What type of relay signals can be sent over various types of communication channels - ANSWER-Pilot QUESTION: The is responsible for the Real-time monitoring and forecasting of solar and geophysical events that affect power grids and other technological systems. - ANSWER- SWPC

QUESTION: What is the role of the RC in the system restoration process? - ANSWER-Monitor restoration progress, coordinate restoration activities, restore the BES frequency within acceptable operating limits QUESTION: One or more facilities hosting operating personnel that monitor and control the BES in real-time to perform the reliability task is called a? - ANSWER-Control Center QUESTION: What is a document that identifies specific steps or tasks that should be taken by one or more specific operating positions to achieve specific operating goals - ANSWER- Operating Procedure QUESTION: A document that identifies general steps for achieving a generic operating goal - ANSWER-Operating Process QUESTION: How often must a System Restoration Plan be viewed? - ANSWER-Annually

QUESTION: A condition when the transmission network connections between a generating unit, or a geographic unit and the interconnection become weakened such that cascading events may occur - ANSWER-Dynamic instability QUESTION: The loss of a generating unit or plant after a close-in fault or short circuit that is not cleared quickly enough - ANSWER-Transient instability QUESTION: In NERC priority order, which facilities have the highest priority following a widespread regional blackout? - ANSWER-Bulk Electric System facilities QUESTION: What percentage of load gives a 1 Hz change in an island condition? - ANSWER-6- 10% (Think 6-10 day island vacation) QUESTION: If ACE is Zero but system Hz is off, what should a system operator do? - ANSWER- Nothing! ACE bias and interchange schedule will improve frequency QUESTION: If ACE is Zero, why not adjust generation to help frequency? -

ANSWER-Could overload equipment, this is a NERC violation