NERC EXAM QUESTIONS: From Class With complete solution NEW!! 100% PASS

NERC EXAM QUESTIONS: From Class With complete
solution NEW!! 100% PASS
A Balancing Authority notices that Operating Reserve has steadily declined throughout the hour.
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What is the most likely cause?
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a) Loss of a large generator in the area
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b) An inaccurate load forecast
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c) Loss of a major transmission line
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d) A malfunction of EMS - Correct Answers b) An inaccurate load forecast
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Il` Balancing Area A notices that the Interconnection frequency is 59.94 Hz and their ACE is 0. Which
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Il` of the following could be the cause of this reading?
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a) A net under-generation in Balancing Area A
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b) A net under-generation in the Interconnection
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c) A loss of load in Balancing Area A
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d) A loss of load in the Interconnection - Correct Answers b) A net under-generation in the
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Interconnection
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Il` What is the penalty for a Balancing Authority violating the Disturbance Control Standard?
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a) Must carry additional Contingency Reserve
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b) Must develop a correction action plan
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c) Must re-evaluate and change its Frequency Bias Setting
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d) Must increase its Regulating Reserve - Correct Answers a) Must carry additional Contingency
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Reserve
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, Il` Your ACE is a large negative value and system frequency is 59.80 Hz. Your AGC system is pulsing
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Il` your units down. What should you do?
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a) Place AGC in flat frequency control
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b) Place AGC in flat tie line control
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c) Suspend AGC and investigate
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d) Do nothing as this is normal - Correct Answers c) Suspend AGC and investigate
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Il` When two identical generating units are operated in parallel on governor control, and on machine
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Il` has a 5% droop and the other has a 10% droop, the unit with the greater (10%) governor droop
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Il` will:



a) Respond less to frequency deviations
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b) Respond more to frequency deviations
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c) Respond the same to frequency deviations
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d) Not adjust for frequency changes - Correct Answers a) Respond less to frequency deviations
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Il` On a radial transmission system a generator has a capacity of 600 MWs. The Droop characteristic
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Il` is at 5% and the generator is currently loaded at 300 MWs. If frequency suddenly drops to 59.3 Hz,
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Il` what would be the total generator output?
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a) 350 Il`




b) 400 Il`




c) 440 Il` Il`




d) 600 - Correct Answers c) 440
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Il` What is the main purpose of the Frequency Bias Setting in the ACE equation?
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