Practice Test NERC Questions and Verified Answers 2024

Practice Test NERC Questions and Verified Answers 2024 ________will be sold as a non -firm transmission product during EEA2 - CORRECT ANSWER Capacity Benefit Margin A ___________ tool is used to ensure the power system can respond within acceptable limits N -1 conditions - CORRECT ANSWER Contingency Analysis A ___________ tool is used to ensure the power system can respond within acceptable limits of N -1 - CORRECT ANSWER Contingency Analysis A 0.3 Hz drop occurs, causing a 500 MW generator to increase its output from 400 MW to 450 MW. What is the % droop of this generator? - CORRECT ANSWER 5% A 230 kV transmission line is energized at 230 kV and is 100 miles long what is the approximate line charging contribution of this transmission line? - CORRECT ANSWER 30 MVAR 230 kV= 1/3 MVAR per mile A 230/115 kV transformer is rated at 100 MVA and has 80 MW entering the primary side. What would you expect the real power output to be on the secondary side? - CORRECT ANSWER 80 MW A 230kV transmission line is energized at 230kV and is 100 miles long. What is the approximate line charging contribution? - CORRECT ANSWER 30MVAR A 500 MW generator trips in a BA to external to your BA. Which of the following responses would you expect to see in your Area? - CORRECT ANSWER Positive Net Actual Interchange deviation A 800 MW generator is synchronized and loaded at 650 MW. The generator can ramp at 5 MW min. What is the amount of spinning reserve presently available on the unit? - CORRECT ANSWER 75 MW A 1000 MVA rated generator that produces 800 MW and 100 MVAR is best described as? - CORRECT ANSWER Operating in a lagging mode. Inductive system A BA is experiencing low voltage in the northeast region. A 50 MVA generator in that area is loaded at 50 MWs. What action could a System Operator take to increase the voltage in that area? - CORRECT ANSWER Decrease real power and increase reactive power A BA with a bias setting of -200MW/0.1Hz changed NIs by +40MW as their part of a time error correction. The BA system operator decides instead of changing their NIs they will change their Fs value. The Fs value would be what? - CORRECT ANSWER 60.02 Hz A BA's ACE is 0 as long as which of the following is maintained? - CORRECT ANSWER The balance between actual and scheduled interchange plus the proper contribution to interconnection frequency regulation A bus with a closed breaker and then open end breaker. Draw a line of the voltage profile - CORRECT ANSWER Close to open Voltage profile will increase when getting closer to the open breaker A certain dynamic schedule is tagged for an average flow of 100 MW. By what min amount would this schedule have to change before the tag must be updated? - CORRECT ANSWER 26 MW A certain dynamic schedule is tagged for an average flow of 100 MW. By what minimum amount would this schedule have to change before the Tag must be updated? - CORRECT ANSWER 26 MW A contingency results in the accidents of a IROL.What could be the result if the IROL is allowed to be exceeded longer than its Tv? - CORRECT ANSWER Interruption of power to a large part of the BES A contingency results in the exceedance of an IROL. What could be the result if the IROL is allowed to be exceeded longer than T sub v - CORRECT ANSWER Interruption of power to a large part of the BES A contingency results in the exceedance of an IROL. What could be the result if the IROL is allowed to be exceeded longer than Tv? - CORRECT ANSWER Interruption of power to a large part of the BES A dynamic schedule is tagged for 25 MW. By what min % amount would this flow have to change to change before the Tag must be updated? - CORRECT ANSWER More than 100% A GDM is predicted to occur tomorrow which parts of the system are most likely to experience problems - CORRECT ANSWER Wye connected transformers A generator delivers its power to a multi line transmission system. Of the multiple lines connected to the generator bus, line X absorbs 25% of the generator output is line X as a transfer limit of 200 MW what is the maximum output of the generator? - CORRECT ANSWER 800 MW .25/200 = 1/x cross multiply A load has a power factor of 0.9 lagging. If the load draws 100 MVA, what is the MW draw? - CORRECT ANSWER 90 pf= mw/mva A major TO line has been scheduled out for maintenance. Other outages have occurred and the load will be greater than originally expected. The system operator should: - CORRECT ANSWER Preform a load flow study prior to allowing the previously scheduled A portion of a RC is experiencing low voltage. What directives should the RC give? - CORRECT ANSWER Lower transfer across the area and decrease generation. A power system has ten units on AGC. The units have different capacities and droop settings. The biggest adjustments in MW output in response to frequency disturbance will be provided by units that have? - CORRECT ANSWER Large capacity and small droop setting A pseudo -tie is entered into what proportion of a BAs tie -line ACE equation? - CORRECT ANSWER Actual Interchange A radial transmission line feeding load is overloaded. The TOP must do which of the following to unload the line? - CORRECT ANSWER Shed Load at the end of the line A reactor is rated at 100 MVAR nominal and is operating at a voltage of 90% how many MVAR is it absorbing from the system? - CORRECT ANSWER (V actual/V nominal) ^2 ) x MVAR 81 MVAR A simple power system is composed of three lines connecting generation to load. Each lines the same impedance, is initially loaded at 200 MW , and has a thermal limit of 400 MW. If one line trips, what the loading on the shortest remaining line be and will the thermal limit either remaining line be violated? - CORRECT ANSWER 300 MW and No A simple power system is composed of three transmission lines that connect the generation area to the load area. Three transmission lines are the same length but each line has a different impedance.