NERC Additional Test Questions With Correct Answers

1. Balancing Authority A is importing MW and has a tie-Iine flowing into them when the meter fails to zero. Which of the following statements is true? A) The Balancing Authority's frequency will drop B) The Balancing Authority's generators on AGC will decrease output C) The Balancing Authority's frequency will increase D) The Balancing Authority's ACE reading will decrease - Answer B) The Balancing Authority's generators on AGC will decrease output 2. Balancing Authority A has tie-line meter fail to zero on a line that is exporting 200 MWs. Which of the following statements is true? A) The Balancing Authority's total demand indication will increase B) The Balancing Authority's generators on AGC will decrease output C) The Balancing Authority's frequency will decrease D) The Balancing Authority's ACE reading will increase - Answer A) The Balancing Authority's total demand indication will increase 3. How does a System Operator realize the power system is getting close to the end of its available reactive resources? A) The voltage is increasing B) The rate of decrease/increase of the voltage does not relate to change in the load C) The rate of increase of the voltage decreases with the load D) The rate of decrease of the voltage increases with the load - Answer D) The rate of decrease of the voltage increases with the load 4. Which of the following indications would result from a significant loss of generation on an external BA? A) your ACE goes up and frequency stays the same B) your ACE stays the same and frequency increases C) your ACE stays the same and frequency decreases D) your ACE goes down and frequency drops - Answer D) your ACE goes down and frequency drops 5. You have restored a line to service after an outage. After closing the line, one of the phases shows no current flow. What is your next action? A) Have the on-site crew open the line B) Notify your RC C) Call the crew that restored the line to check reading on each phase D) Report RTU problem - Answer C) Call the crew that restored the line to check reading on each phase 6. Which of the following would classify as an Operating Instruction? A) Requesting generator status from a Generator Operator B) Discussing Operating Plan with an Adjacent Transmission Operator C) Directing a Generator Operator to maintain current MVAR output of a generator D) Requesting outage information from a Distribution Provider - Answer C) Directing a Generator Operator to maintain current MVAR output of a generator 7. After the winter morning peak, you have CTs base-loaded unable to decrease output and other units unable to regulate any lower. Nuclear units are loaded and your solar is starting to pick up. ACE is trending up and you have no regulation. What would you do? - Answer A) Take your CTs off-line B) Increase Interchange out C) Curtail solar power production D) Consider available spinning reserve and replace resources planned for the day :: A) Take your CTs off-line 8. How can you more effectively increase the MW transfer rate through a transmission line? A) Decrease Voltage on the sending end B) Change taps on the Phase Shifting Transformer (PST) C) Increase load on the receiving end D) Install series reactor in the line - Answer B) Change taps on the Phase Shifting Transformer (PST) 9. Generators will trip on an under-frequency condition of approximately 57.5 Hz. What is the purpose of generator under-frequency trips? A) To protect the turbine from damage B) To protect the generator windings from overheating C) To rebalance generation and load and arrest the frequency drop D) To prevent islanding conditions - Answer A) To protect the turbine from damage 10. What is the expected inrush of cold load? A) less than 5 times the MVA B) up to 10 times the MVA C) up to 20 times the MVA D) no changes in MVA - Answer B) up to 10 times the MVA 11. A Balancing Authority Area has two 800 MW generators, three 400 MW generators, and many generators less than 200 MW. What is the MSSC for this Balancing Area? A) 1600 MW B) 800MW C) 640 MW D) 1200 MW - Answer B) 800MW 12. Line A has an SOL of 250 MVA and is currently loaded at 200 MVA) Line B is loaded at 500 MVA and has an LODF of 0.2 to Line A. If Line B relays out what will be the new power flow on Line A? A) 300 MVA B) 325 MVA C) 290 MVA D) 245 MVA - Answer A) 300 MVA 13. A Balancing Authority is in an EEA 1, what must the Balancing Authority do prior to moving to the next EEA Level? A) Inform the Transmission Operator and Reliability Coordinator B) Ensure operating reserve in place, additional transaction purchases are scheduled, and all available generation online C: Shed all non-firm load D) Ensure operating reserve in place, all purchases scheduled, and all non-firm load has been shed - Answer B) Ensure operating reserve in place, additional transaction purchases are scheduled, and all available generation online 16. A system operator is trying to synchronize lines A and 8. Voltage at A is 125 kV and Voltage at B is 115 kV. Reactive reserves are at their maximum output. What action should the system operator take first? A) Increase Generation at B B) Decrease Generation at A C) Shed Load electrically close to Station B D) Increase Load at Station A - Answer D) Increase Load at Station A ( to lower V) 17. In order to be considered controllable load or contingency reserves the load must be...? A) Non-Critical B) SCADA Controlled C) Able to reduce within a specific time period D) Non-Firm Load - Answer C) Able to reduce within a specific time period 18. On a transmission line that flows Station A to Station B, Station B is open and unable to close due to excessively high voltage at Station B). What device can the system operator use at Station A to mitigate this system problem? A) Insert a Shunt Capacitor B) Insert a Series Capacitor C) Insert Shunt Reactor D) Bypass a Series Capacitor - Answer C) Insert Shunt Reactor 19. Geomagnetic Disturbances effect the ability to control: A) AGC B) Frequency C) Reactive Power D) Real Power - Answer C) Reactive Power 20. Geomagnetic Induced Currents (GIC) may cause which of the following when they travel into the power system? A) Decrease reactive power demand B) Generator operations in the Lead C) Increase of reactive power reserves D) Transformer hot spot and over-heating - Answer D) Transformer hot spot and over-heating 21. How often is a Reliability Coordinator required to perform Real-time assessments to identify an SOL or IROL violation? A) 15 minutes B) 30 minutes C) 60 minutes D) 120 minutes - Answer B) 30 minutes 22. A transmission line has capacitance reactance of 200 ohms and inductive reactance of 600 ohms, what is the net reactance of this line? A) 200 ohms B) 400 ohms C) 600 ohms D) 800 ohms - Answer B) 400 ohms 23. How many poles does a generator need if the RPM is 300 and the Generator Owner expects to operate in the same 60.00 Hz system as a 4 pole, 1800 RPM generator? A) 12 poles B) 18 poles C) 24 poles D) 48 poles - Answer C) 24 poles 24. What is a Power System Stabilizer used for? A) Dampening low frequency oscillations B) Correct the excitation system response to low frequency oscillations C) Send corrective voltage signals to the AVR D) All of these are correct - Answer D) All of these are correct 25. When is it acceptable for the voltage to be reduced by 5%? A) To increase power transfers B) When demand is high and needs to be reduced C) When islanding D) When generation is too high - Answer B) When demand is high and needs to be reduced 26. You have requested an EEA to be declared by your Reliability Coordinator, you have no sales and there are no entities with generation to sell, which EEA are you in if you have your contingency reserves and generation to meet the peak and have implemented demand-side management procedures? A) EEA 0 B) EEA 1 C) EEA 2 D) EEA 3 - Answer C) EEA 2 27. You have maximum generation of 15,000 MW, you are expecting a peak of 7000 MW, you are selling 4000 MW and your largest unit is 1400 MW, what is the total generation you must have? A) 8400 B) 9600 C) 12400 D) 15060 :: C) 12400 28. A Reliability Coordinator receives a Time Error notification to begin at the top of the hour and last for 6 hours. Whom does the RC notify of a Time Error correction? A) All Balancing Authorities in the Interconnection B) Balancing Authorities in its area C) Post it on RCIS D) RC implements time error correction for their BA - Answer B) Balancing Authorities in its area