Practice Test NERC Questions Latest Update
2024-2025 235 Questions and 100% Verified
Correct Answers Actual Exam Guaranteed A+
________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 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 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 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.
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