SOS NERC Prep - RELIABILITY Exam Complete Questions with Correct Answers Updated 2025/2026||Already Graded!!! 100% Guaranteed Pass

SOS NERC Prep - RELIABILITY Exam Complete Questions with Correct Answers Updated 2025/2026||Already Graded!!! 100% Guaranteed Pass 1. Operational Planning Analysis is a Reliability Analysis studies conducted by Reliability Coordinators for the purpose to assess whether the planned operations for the next day within its Wide Area, will exceed A) any of its Interconnection Reliability Operating Limits B) Cost/profitability of maintaining economic dispatch C) Operating limitations of generating facilities D) Available Transfer Capability - ANSWER A) any of its Interconnection Reliability Operating Limits 2. The ________________ must have the authority, plan, and agreements in place to immediately direct reliability entities within their _________________ Areas to re-dispatch generation, reconfigure transmission or reduce load to mitigate critical conditions and return the system to a reliable state. A) Reliability Coordinator; Reliability Coordinator B) Balancing Authority; Balancing C) Transmission Operator; Transmission D) Operations; Planning - ANSWER A) Reliability Coordinator; Reliability Coordinator 3. When a Reliability Coordinator is performing the next-day analysis for its Reliability Coordination Area, what information is required for the system study? A) Area Interchange Error (AIE) documents, area inadvertent accumulations, weather forecast and geomagnetic forecasts. B) Interchange transactions, area inadvertent accumulations, staffing summaries, and load. C) Critical facility status, load, generation, operation reserve projections, and known interchange transactions. D) Load, generation, Area Interchange Error (AIE) documents, operations reserve projections, and staffing summaries. - ANSWER C) Critical facility status, load, generation, operation reserve projections, and known interchange transactions. 4. A Balancing Authority was only 95% compliant with the DCS criteria for the first quarter of the year. What action must the Balancing Authority take? A) Must carry additional regulating reserve for 3 months starting April 1. B) Must carry additional regulating reserve for 3 months starting May 1. C) Must carry additional contingency reserve for 3 months starting May 1. D) Must carry additional contingency reserve for 3 months starting April 1. - ANSWER C) Must carry additional contingency reserve for 3 months starting May 1. 5. Sufficient Operating Reserve is defined as the capacity required to meet what? A) DOE specifications B) CPS and DCS C) Capacity Standard D) CPS 1 & 2 only - ANSWER B) CPS and DCS 6. If a Balancing Authority has an ACE of -175 MW and Frequency is 59.85 Hz. Which real-time Control Performance Standard maybe outside of its low limit? A) AGC B) BAAL C) DCS D) CPS1 - ANSWER B) BAAL 7. EMS and AGC have failed at 12:25 and generation must be controlled manually. At the top of the hour, load is expected to increase 100 MWs, imports will increase by 75 MWs. ACE is reading 25 MWs. What should the operator do now after verifying the ACE value? A) Increase generation by 25 MWs for the top of the hour B) Increase generation by 50 MWs C) Decrease generation by 25 MWs D) Decrease generation by 50 MWs - ANSWER C) Decrease generation by 25 MWs 8. Which of the following conditions describes a case where a Balancing Authority is hindering the Interconnection scheduled frequency? A) ACE is negative while frequency is below 60.00 Hz B) ACE is positive while frequency is 60.00 Hz C) ACE is negative while frequency is above 60.00 Hz D) ACE is positive while frequency is below 60.00 Hz - ANSWER A) ACE is negative while frequency is below 60.00 Hz 9. Balancing Authority "A" is importing 225 MWs,and is only scheduled to import 200 MWs. The BAs Beta is 200 MWs/.1 Hz and frequency is 59.99 Hz. What does ACE indicate? A) 45 MW over-generating B) 45 MW under-generating C) 20 MW over-generating D) 20 MW under-generating - ANSWER B) 45 MW under-generating 10.A Balancing Authority has a normal load of around 8500 MW. Its most severe single contingency is a 700-MW coal-fired steam unit. At 0810 the ACE value was at -55 MW when a 600-MW generator in the Balancing Authority's northern area tripped off line as the result of a generator differential. This resulted in a large negative ACE for the Balancing Authority. What value must the ACE return to and in what time frame to avoid a DCS violation? A) -55 MW ACE in 10 minutes B) Zero ACE in 15 minutes C) -55 MW ACE in 15 minutes D) This did not constitute a reportable disturbance. - ANSWER C) -55 MW ACE in 15 minutes 11.A Balancing Authority is performing Overlap Regulation Service for another Balancing Authority. Which of the following statements applies to the Balancing Authority providing this service? A) The Balancing Authority shall use the larger of the two Frequency Bias Settings in its ACE equation. B) The Balancing Authority's Frequency Bias Setting shall be modified to reflect the combined Frequency Bias Setting of both Balancing Areas. C) The Balancing Authority shall not adjust its Frequency Bias Setting, but instead import the other Balancing Authorities ACE reading. D) The Balancing authority shall use the average of the two Frequency Bias Settings in its ACE equation. - ANSWER B) The Balancing Authority's Frequency Bias Setting shall be modified to reflect the combined Frequency Bias Setting of both Balancing Areas. 12.In a capacity deficiency situation, which actions should be considered if time permits prior to Firm Load Shed? A) Request the RC declare a NERC EEA Level 3 B) Ensure all available resources in use C) Implement local Load Management Procedures D) All the Above - ANSWER D) All the Above 13.How often should the Transmission Operator and Balancing Authority review and update their Loss of Control Room Functionality Operating Plan? A) Every two years B) Annually C) As needed D) Every three years - ANSWER B) Annually 14.A Balancing Area has separated from the Interconnection during a severe thunder storm and is in a blackout condition. Several plants tripped off-line including a 200 MW blackstart capable unit and a blackstart capable hydro plant located 175 miles from the load center connected by a 345 kV system. What actions should the BA take to restore the area? A) Open all breakers in area first then isolate the transmission paths into the power plants. B) Isolate the transmission paths into the power plants. Order the hydro plant on line and begin energizing customer loads. C) Close all the breakers that tripped to the blackstart capable units. D) Isolate the transmission paths into the power plants, Bring the 200 MW blackstart unit on line to support the power plants auxiliaries, add load in 10 MW blocks while increasing generation, Bring on additional generation. - ANSWER D) Isolate the transmission paths into the power plants, Bring the 200 MW blackstart unit on line to support the power plants auxiliaries, add load in 10 MW blocks while increasing generation, Bring on additional generation. 15.A Balancing Authority's largest single contingency is a unit rated at 1,000 MW. Which of the following disturbances would constitute a reportable disturbance for Disturbance Control Performance evaluation based on the NERC DCS criteria? A) The loss of 715 MW of firm load. B) The loss of 3 generating units totaling 1,300 MW over a period of 3 hours. C) The loss of a 750 MW generating unit at 100% output. D) The loss of a 950 MW generating unit at 100% output. - ANSWER D) The loss of a 950 MW generating unit at 100% output. 16.Where should the synchronization of islands occur? A) Remote Locations B) Predefined locations C) Outside of BA D) Control Room - ANSWER B) Predefined locations 17.Which of the following is considered to be a reliability event? 1) Low voltage 2) Loss of a small generator 3) SOL or IROL exceeded 4) Loss of Energy Management System 18.1 and 3 19.3 and 4 20.1 and 2 21.2 and 3 - ANSWER A) 1 and 3 22.A severe lightning storm has hit your transmission system and damaged two 345 kV lines (unable to be re-energized) and tripped two large generators of 500 MW and 700 MW off line. No additional generators are available and the parallel 230 kV are loaded at their emergency limits. What should the system operator do? A) Wait for the generator operator to report on when the generators can be back on line B) Remove system protection from the over loaded transmission lines to prevent tripping C) Shed Load D) Place all shunt reactors in service - ANSWER C) Shed Load 23.If a circuit breaker does not have a synch-check, reclosing relay and has a large standing phase angle across it, how can the system operator know if it is safe to close the breaker avoiding shock torque to the neighboring generators? A) Ask the generator operators to change reactive to a leading power factor and then check the frequency. B) If the voltage is within +/- 10 % it is OK to close the breaker. C) Obtain help from the Regional operating committee engineers to advise you. D) Use the synchroscope in the substation control room as a guide to show you how to adjust the system to improve the phase angle. - ANSWER D) Use the synchroscope in the substation control room as a guide to show you how to adjust the system to improve the phase angle. 24.When a system is in an island, how much load needs to be shed to compensate for a 1 Hz deviation in frequency? A) 1 to 2 % B) 3 to 5 % C) 10 to 12 % D) 6 to 10 % - ANSWER D) 6 to 10 % 25.A radial transmission line is overloaded. Which action must a Transmission Operator do to unload the line? A) Lower interchange schedule. B) Shed load at the end of the radial line. C) Raise interchange schedule. D) Notify Balancing Authority to increase generation - ANSWER B) Shed load at the end of the radial line. 26.When a high voltage transmission line's circuit breaker has tripped open as the result of a fault, a synchronous check type relay will monitor certain values on the line side of the open circuit breaker, and the bus side of the open circuit breaker. Before the synchronous check relay will close the open circuit breaker back, which of the following values must be within a certain limit before the circuit breaker will close automatically? A) Voltage magnitudes B) Frequency of the voltages, Voltage magnitudes, Phase Angle between the voltages C) Phase Angle between the voltages D) Frequency of the voltages - ANSWER B) Frequency of the voltages, Voltage magnitudes, Phase Angle between the voltages 27.Your system is on the verge of a voltage collapse and all reactive resources are at maximum output. You have determined that shedding firm load will alleviate the problem. Before shedding the load, with whom must you confirm the action? A) No one B) The Load Serving Entity C) The Reliability Coordinator D) Other affected Transmission Operators - ANSWER A) No one 28.System Restoration plans should establish the transmission system backbone using the highest voltage line available because of the ________ impedance of the ____________voltage lines. A) higher: lower B) capacitance; higher C) power flow; reactive D) lower; higher - ANSWER D) lower; higher 29.You are a Reliability Coordinator experiencing a flow gate that has become overloaded because a parallel 345 kV line has relayed out causing an SOL violation. What would you do to relieve this violation? A) Order the line be placed back in service within 30 minutes. B) Notify the affected Reliability Coordinator and ask them to resolve this issue C) Implement the appropriate transmission loading relief procedures D) Issue a warning to the Transmission Operators that lost the 345 kV line. - ANSWER C) Implement the appropriate transmission loading relief procedures 30.If you are still in an emergency after utilizing your own resources, reserves and readily available operating reserve including scheduling assistance from others, you should ______________. A) drop transmission lines B) put reactor banks in service C) manually shed load D) reduce voltage on the transmission system - ANSWER C) manually shed load 31.A Transmission Operator is implementing their system restoration plan after a major system disturbance. When they are ready to energize a blacked-out area, the system operator must _________________. A) Close any capacitor banks which are open B) Turn all voltage regulators to the manual position C) Increase blackstart generator to maximum output D) Isolate the load - ANSWER D) Isolate the load 32.Re-synchronization with the Interconnection should only be attempted at a _____________. A) Substation with a synchroscope B) Generating plant with an auto-synchronization relay C) Substation with auto re-closing relays D) Substation with an auto-synchronization relay - ANSWER A) Substation with a synchroscope 33.During on-peak hours, a Transmission Operator suddenly recognizes that a heavily loaded transmission system has insufficient reactive resources to maintain nominal voltage. It is determined that firm load shedding will be necessary to avoid a potential voltage collapse on the transmission system. What would be the proper notification through predetermined communication paths in this circumstance? A) Its Reliability Coordinator and all other potentially affected Balancing Authorities and Transmission Operators B) Its Reliability Coordinator and all other potentially Purchasing Entities. C) All Balancing Authorities and Transmission Operators in the Interconnection electronically D) The Shift manager and Regional organization - ANSWER A) Its Reliability Coordinator and all other potentially affected Balancing Authorities and Transmission Operators 34.Bulk Electric System facilities shall not be removed from service by a System Operator if removing those facilities would burden neighboring systems unless: 1) the Generator Operator coordinates with the Transmission Operator 2) the Transmission Operator coordinates with the Reliability Coordinator 3) the market is making money 4) The Generator Operator gets permission from its PurchaseSelling Entity 35.2 and 4 36.3 and 4 37.2 and 3 38.1 and 2 - ANSWER D) 1 and 2 39.If a Transmission Operator or Balancing Authority is unable to restore Real and/or Reactive Power Balance, they must request emergency assistance from the Reliability Coordinator. If Operating reserves are not available, corrective action need to include: A) Reduce interchange between systems B) Implement manual load shedding. C) Reduce voltage on the distribution system. D) Notify the RRO. - ANSWER B) Implement manual load shedding. 40.A System Operator is in the process of restoring load after a system collapse. The system currently has three generators online with a combined capacity of 1200 MWs. Current load on the system is 500 MWs. What is the maximum load that the System Operator can restore at one time without risking the re-collapse of the system. A) 25 MWs B) 80 MWs C) 35 MWs D) 60 MWs - ANSWER D) 60 MWs