SOS NERC RELIABILITY EXAM QUESTIONS WITH ANSWERS LATEST

Metered Data included in the calculation of ACE are: dynamic schedules, pseudo ties, actual frequency, and all __________. A) Tie lines readings B) Generators output C) Scheduled frequency indications SOS NERC RELIABILITY EXAM QUESTIONS & ANSWERS LATEST GRADED A+ D) Transformer load - A) Tie lines readings Balancing Authority A is currently reading a system frequency of 60.00 Hz. Its Net Actual Interchange is +100 MW and its Net Scheduled Interchange is +200 MW. If Balancing Authority A's frequency bias setting is 100 MW/0.1 Hz, what is ACE? A) -100 B) 0 C) 10 D) 100 - A) -100 A Balancing Authority has a Net Interchange Schedule of -250 MWs from 1200 to 1600 on a summer day. The Net Interchange Actual for those same hours respectively were -230 MW, -275 MW, -250 MW and -270 MW. What was the Balancing Authority's Inadvertent Interchange for the 4-hour period? A) 6 MWs out B) 25 MWs in C) 25 MWs out D) 6 MWs in - B) 25 MWs in For the ACE equation to work properly, dynamic schedules, pseudo ties, frequency, and all ________________ must be metered. A) Generation B) Communications C) Transformers D) Tie lines - D) Tie lines If the frequency bias setting is set to a less negative value than the frequency response of a Balancing Authority and a frequency increase is caused by a sudden loss of load in an external balancing area, what will be the result? A) The ACE will be zero and will take no AGC action B) The ACE will be a negative value and AGC will increase generation C) The ACE will be a positive value and AGC will lower generation D)This will not affect the ACE - B) The ACE will be a negative value and AGC will increase generation If the frequency bias setting is less negative than the frequency response of a Balancing Authority and a frequency decline is caused by a sudden loss of generation in an external balancing area, what will be the result? A) The ACE will be a negative value and AGC will increase generation. B) This will not affect the ACE. C) The ACE will be a positive value and AGC will lower generation. D) The ACE will be zero and will take no AGC action. - C) The ACE will be a positive value and AGC will lower generation. It is the responsibility of which entity/entities to develop, maintain, and implement load shedding plans? A) Transmission Operators and Balancing Authorities B) Reliability Coordinator C) Load Serving Entities D) Balancing Authority - A) Transmission Operators and Balancing Authorities A Transmission line is loaded 25% above its SOL. A parallel line is out for routine maintenance and can be placed in service in 10 minutes. What is the first step the Operator should take to reduce the line loading? A)Shed load at the downstream bus. B) Open the line. C) Re-Dispatch Generation. D) Initiate the restoration of the parallel line. - D) Initiate the restoration of the parallel line. As a Transmission Operator, you realize that the voltage level is starting to decline in the North West part of the system. Which of the following devices should you, as a Transmission Operator, be able to operate, and/or have another entity operate to raise the voltage level back to normal in the North West part of the system? A) Transformer Underload Tap Changers B) Shunt Capacitor Banks C) Generator Reactive Output D) All answers are correct - D) All answers are correct Voltage reduction for load relief should be made on the __________. A) Distribution system B) Entire Interconnection simultaneously C) Tie-lines with other Balancing Authority Areas D) Transmission System - A) Distribution system Under Frequency Load Shedding (UFLS) is to stabilize the imbalance between generation and load that has been created by a system disturbance. This is accomplished by ____________. A) Tripping generation first B) Voltage reduction on the distribution system. C) Shedding all load to arrest frequency D) Shedding load prior to generation tripping - D) Shedding load prior to generation tripping Failure to meet the DCS criteria of recovery within 15 minutes results in which consequence for a specified time period for the Balancing Authority's failure to recover? A) Increased Contingency Reserve requirements B) Decertification as a Balancing Authority C) Not allowed to supply regulation services D) Expulsion from the Reserve Sharing Group - A) Increased Contingency Reserve requirements A Balancing Authority foresees or is experiencing conditions where all available resources are committed to meet firm load, and firm transactions. The BA should request which level of the Energy Emergency Alerts? A) Energy Emergency Alert Level 2 B) Energy Emergency Alert Level 4 C) Energy Emergency Alert Level 1 D) Energy Emergency Alert Level 3 - C) Energy Emergency Alert Level 1 Preparations are being made to tie two islands together during restoration. Island "A" has a frequency of 58.95 Hz and Island "B" has a frequency of 59.97 Hz. What action should be taken to synchronize the two islands? A) Shed load in Island "B" B) Shed load in Island "A". C) Disable the Synch Check Relay. D) Increase generation in Island "B". - B) Shed load in Island "A". You experience a full system shutdown. You are in the process of restoring load and you are concerned about re-collapsing the system. Which is the best approach in the restoration process that will help ensure your system will be restored successfully? A) Maintain frequency between 59.5 HZ and 60.5 HZ. B) If the system has stabilized at below 60 HZ, shed 15% - 20% of the load to raise the frequency to 61 HZ. C) Avoid energizing loads in excess of 5% of the online generation capacity of the system. D) Operating reserves should be maintained to cover the largest generator currently in service. - C) Avoid energizing loads in excess of 5% of the online generation capacity of the system. In the event a Balancing Area experiences multiple contingencies occurring within _________ of each other, it shall be treated as a single contingency. A) five minutes B) one minute or less C) fifteen minutes D) two minutes - B) one minute or less When coordinating under frequency load shedding and under frequency generator tripping the _____________________________. A) generators should trip before the UFLS B) load should not be shed during the process C) generators should trip after the UFLS D) breakers should open at the same time as the UFLS - C) generators should trip after the UFLS One of the functions of under frequency load shedding is to _________________ within an electrical island that may have been created by a system disturbance. A) balance generation and load B) establish balance between load and interchange C) stabilize balance between generators D) stabilize the Interconnection - A) balance generation and load A major transmission line has become overloaded and the transmission operator has taken actions to unload the line. However, the overload persists, and the equipment is now in imminent danger of damage. What is the next action to take? A) Separate from the Interconnection B) Disconnect the overloaded line and notify the RC and affected Transmission Operators. C) Request a Transmission loading relief procedure D) Request permission from the RC to open the line. - B) Disconnect the overloaded line and notify the RC and affected Transmission Operators. A report shall be submitted to NERC following the shedding of at least how much firm load? A) 100 MW B) 50 MW C) 200 MW D) 300 MW - A) 100 MW The System Operator experiences a major transmission system disturbance which results in a large loss of load. Which of the following results is most likely to occur? A) a decrease in system voltage B) a decrease in system frequency C) an increase in system frequency D) an increase in system voltage in a wide-area - C) an increase in system frequency A radial transmission line feeding a load is overloaded. The Transmission Operator must do which of the following to unload the line? A) Raise interchange schedule B) Lower interchange schedule C) Re-dispatch generation D) Shed load at the end of the line - D) Shed load at the end of the line If a Balancing Authority is unable to purchase capacity or energy to meet its demand and reserve requirements on a day-ahead or hour-by-hour basis, which entity (or entities), is it expected to notify? A) All Reliability Coordinators. B) Its Reliability Coordinator and other Balancing Authorities C) All Reliability Coordinators and marketers D) Transmission Operators - B) Its Reliability Coordinator and other Balancing Authorities Each Transmission Operator is required to have a system restoration plan. What is the first thing a Transmission Operator must do when energizing a blacked out area? A) Isolate the load. B) Turn all voltage regulators to the manual position. C) Contact the Regional Reliability Organization. D)Close any capacitor banks which are open. - A) Isolate the load. After declaring an NERC EEA Level 3, load goes higher than your generation resources, what is an effective tool in restoring generation to load balance? A) Firm Load Shed B) Exceeding emergency limits C) TLR D) Voltage Reduction - A) Firm Load Shed An 800 MW generator trips in a Balancing Authority external to your Balancing Authority Area. Which of the following indications would you expect to see in your area? A) Net Actual Interchange would decrease significantly. B) ACE would drop to approximately -800 MW. C) Frequency would drop, and ACE would remain relatively unchanged. D) Frequency would drop, and ACE would increase significantly. - C) Frequency would drop, and ACE would remain relatively unchanged. When is the only time voltage reduction for load relief is acceptable on the transmission system? A) When voltage on the distribution system is already low. B) It is acceptable anytime load relief is needed. C) When the system is separated from the Interconnection. D) When Interconnection frequency is above 60.00 Hz. - C) When the system is separated from the Interconnection. In system restoration, priority should be given to: A) Restoring customer load as quickly as possible. B) Reporting disturbance to NERC and DOE. C) Restoring auxiliary power to off-line generators. D) Restoring power to critical facilities. - D) Restoring power to critical facilities. If a Balancing Authority or Reserve Sharing Group is experiencing conditions where all available resources are committed to meet firm load, firm transactions, and reserve commitments, what does the deficient entity need to request their Reliability Coordinator to issue? A) Energy Emergency Alert Level 3 B) Energy Emergency Alert Level 1 C) Energy Emergency Warning D) Energy Emergency Alert Level 2 - B) Energy Emergency Alert Level 1 A Transmission Operator's Emergency Operating Plan states when voltages fall below .87 per unit (p.u.) or 87% of nominal voltage and remains at that level for a sustained period of 10 minutes or longer, manual load reduction actions are required. When the system voltage returns to .9 p.u. or 90% manual load disconnection is not required.