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NERC CERTIFICATION TEST EXAM 2026/2027 QUESTIONS
WITH DETAILED VERIFIED ANSWERS / EXAM QUESTIONS
AND VERIFIED ANSWERS |ALREADY GRADED A+|
In a power system, which type of power is necessary for
maintaining voltage within limits and is critical for support of
heavily loaded transmission lines?
A. Apparent Power
B. Reactive Power
C. Solar Power
D. Real Power - ANSWER-B. Reactive Power
Feedback: Reactive Power is the energy stored in magnetic and
electrical fields and is critical in voltage support. The VAR
standards address requirements to ensure TOPs and GOPs work
together to maintain sufficient reactive reserves on the system.
A transformer rated at 550 MVA has 500 MW and 55 MVAR
passing through it. Which of the following is true?
A. The load on the transformer cannot be determined without
knowing the power factor
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B. No action is required because the transformer is less than 10%
above its limit
C. The load on the transformer must be reduced because it is
above its limit
D. No action is required because the transformer is within limits -
ANSWER-D. No action is required because the transformer is
within limits
Feedback: This question can be answered by using the
Pythagorean theorem. If you calculate MVA by squaring MW and
MVAR and add them together, then take the square root, you
should find that the transformer has a little more than 503 MVA
flowing through it which is well within its limit of 550 MVA.
On a radial transmission system a generator has a capacity of
600 MWs. The Droop characteristic is at 5% and the generator is
currently loaded at 300 MWs. If frequency suddenly drops to 59.3
Hz, what would be the total generator output?
A. 600
B. 400
C. 440
D. 350 - ANSWER-C. 440
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Feedback: 600 MW/3 Hz = 200 MWs/Hz: Frequency dropped .7
Hz and .7 times 200 = 140 MWs. The generator would increase
140 MWs => 300 + 140 = 440 MWs.
Balancing Authority ABC is a member of a Reserve Sharing
Group (RSP). At 0605 Balancing Authority ABC loses a 500 MW
generator. It calls on its RSG to replace the lost generation until it
can get more generation, such as gas turbines on line and
loaded. What time must Balancing Authority ABC stop using RSG
power to avoid having to submit an Arranged Interchange
request?
A. 0710
B. 0650
C. 0705
D. 0750 - ANSWER-C. 0705
Feedback: Balancing Authority ABC can use imported power in an
emergency for up to 60 minutes beyond the loss of a major
resource without submitting a request for Arranged Interchange.-
NERC Standard INT-010, R1
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Examples of ______ reactive resources include generators,
synchronous condensers and SVC's.
A. Dynamic
B. Static
C. Costly
D. Stationary - ANSWER-A. Dynamic
Feedback: VAR-001 states, "Each Transmission Operator shall
operate or direct the operation of capacitive and inductive reactive
resources within its area - including reactive generation
scheduling; transmission line and reactive resource switching;
and, if necessary, load shedding - to maintain system and
Interconnection voltages within established limits." Examples of
dynamic reactive resources include generators and synchronous
condensers. A shunt capacitor is considered a static reactive
resources. Dynamic reactive resources are ones that can
automatically vary their MVAR output in response to changing
voltage levels.- NERC Standard VAR-001
Your ACE is a large negative value and system frequency is 59.80
Hz. Your AGC system is pulsing your units down. What should
you do?
NERC CERTIFICATION TEST EXAM 2026/2027 QUESTIONS
WITH DETAILED VERIFIED ANSWERS / EXAM QUESTIONS
AND VERIFIED ANSWERS |ALREADY GRADED A+|
In a power system, which type of power is necessary for
maintaining voltage within limits and is critical for support of
heavily loaded transmission lines?
A. Apparent Power
B. Reactive Power
C. Solar Power
D. Real Power - ANSWER-B. Reactive Power
Feedback: Reactive Power is the energy stored in magnetic and
electrical fields and is critical in voltage support. The VAR
standards address requirements to ensure TOPs and GOPs work
together to maintain sufficient reactive reserves on the system.
A transformer rated at 550 MVA has 500 MW and 55 MVAR
passing through it. Which of the following is true?
A. The load on the transformer cannot be determined without
knowing the power factor
, Page |2
B. No action is required because the transformer is less than 10%
above its limit
C. The load on the transformer must be reduced because it is
above its limit
D. No action is required because the transformer is within limits -
ANSWER-D. No action is required because the transformer is
within limits
Feedback: This question can be answered by using the
Pythagorean theorem. If you calculate MVA by squaring MW and
MVAR and add them together, then take the square root, you
should find that the transformer has a little more than 503 MVA
flowing through it which is well within its limit of 550 MVA.
On a radial transmission system a generator has a capacity of
600 MWs. The Droop characteristic is at 5% and the generator is
currently loaded at 300 MWs. If frequency suddenly drops to 59.3
Hz, what would be the total generator output?
A. 600
B. 400
C. 440
D. 350 - ANSWER-C. 440
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Feedback: 600 MW/3 Hz = 200 MWs/Hz: Frequency dropped .7
Hz and .7 times 200 = 140 MWs. The generator would increase
140 MWs => 300 + 140 = 440 MWs.
Balancing Authority ABC is a member of a Reserve Sharing
Group (RSP). At 0605 Balancing Authority ABC loses a 500 MW
generator. It calls on its RSG to replace the lost generation until it
can get more generation, such as gas turbines on line and
loaded. What time must Balancing Authority ABC stop using RSG
power to avoid having to submit an Arranged Interchange
request?
A. 0710
B. 0650
C. 0705
D. 0750 - ANSWER-C. 0705
Feedback: Balancing Authority ABC can use imported power in an
emergency for up to 60 minutes beyond the loss of a major
resource without submitting a request for Arranged Interchange.-
NERC Standard INT-010, R1
, Page |4
Examples of ______ reactive resources include generators,
synchronous condensers and SVC's.
A. Dynamic
B. Static
C. Costly
D. Stationary - ANSWER-A. Dynamic
Feedback: VAR-001 states, "Each Transmission Operator shall
operate or direct the operation of capacitive and inductive reactive
resources within its area - including reactive generation
scheduling; transmission line and reactive resource switching;
and, if necessary, load shedding - to maintain system and
Interconnection voltages within established limits." Examples of
dynamic reactive resources include generators and synchronous
condensers. A shunt capacitor is considered a static reactive
resources. Dynamic reactive resources are ones that can
automatically vary their MVAR output in response to changing
voltage levels.- NERC Standard VAR-001
Your ACE is a large negative value and system frequency is 59.80
Hz. Your AGC system is pulsing your units down. What should
you do?
