NERC CERTIFICATION EXAM 2025 | ACTUAL EXAM TEST
BANK WITH ALL TESTING VERSIONS QUESTIONS AND
ANSWERS WITH A STUDY GUIDE | EXPERT VERIFIED FOR
GUARANTEED PASS | LATEST UPDATE
Generators will trip on an under - frequency condition of approximately 57.5 Hz . What is the
purpose of generator under-frequency trips?
a. To protect the turbine from damage
b. To protect the generator windings from overheating
c. To rebalance generation and load and arrest the frequency drop
d. To prevent islanding conditions
a. To protect the turbine from damage
What is the expected inrush of cold load ?
a . less than 5 times the MVA
b . up to 10 times the MVA
c . up to 20 times the MVA
d . no changes in MVA
b . up to 10 times the MVA
A Balancing Authority Area has two 800 MW generators , three 400 MW generators , and many
generators less than 200 MW . What is the MSSC for this Balancing Area ??
a. 1600 MW
b. 800 MW
c. 640 MW
d. 1200 MW
b. 800 MW
But 640MW is the reportable event threahold
Line A has an SOL of 250 MVA and is currently loaded at 200 MVA . Line B is and has an
LODF of 0.2 to Line A. If Line B relays out what will be the new power flow on Line A ? loaded
at 500 MVA
a. 300 MVA
b. 325 MVA
c. 290 MVA
d. 245 MVA
1
,a. 300 MVA
A Balancing Authority is in an EEA 1 , what must the Balancing Authority do prior to moving to
the next EEA Level ?
a. Inform the Transmission Operator and Reliability Coordinator
b. Ensure operating reserve in place , additional transaction purchases are scheduled , and all
available generation online
c. Shed all non - firm load
d. Ensure operating reserve in place , all purchases scheduled , and all non - firm load has been
shed
d. Ensure operating reserve in place , all purchases scheduled , and all non - firm load has been
shed
Line 1 SOL is 250 MVA , Line 3 has an OTDF of 0.25 to line 1. If line 3 relays out what will be
the SOMVAR Line 1 loading on Line 1 and will it be within its SOL limit ?
Line 1 - 200MVA, 50MVAR
Line 2 - 150MVA, 30MVAR
Line 3 - 300MVA, 0.25 OTDF
a . 220 / No
b . 250 / Yes
C. 275 / No
d . 275 / Yes
C. 275 / No
Which curve best represents the Ferranti effect ?
a. 1
b. 2
c. 3
d. 4
b. 2
Line gently goes up as Voltage get higher abd lines gets longer
A system operator is trying to synchronize lines A and B. Voltage at A is 125 kV and Voltage at B
is 115 kV . Reactive reserves are at their maximum output . What action should the system
operator take first ?
a. Increase Generation at B
b. Decrease Generation at A
2
,c. Shed Load electrical close to Station B
d. Increase Load at Station A
d. Increase Load at Station A
In ordered to be considered controllable load for contingency reserves the load must be ... ?
a . Non - Critical
b. SCADA Controlled
c. Able to reduce within a specific time period
d . Non - Firm Load
c. Able to reduce within a specific time period
On a transmission line that flows Station A to Station B. Station B is open and unable to close
due to excessively high voltage at Station B. What device can the system operator use at Station
A to mitigate this system problem ?
a. Insert a Shunt Capacitor
b. Insert a Series Capacitor
c. Insert Shunt Reactor
d. Bypass a Series Capacitor
c. Insert Shunt Reactor
Geomagnetic Disturbances effect the ability to control :
a. AGC
b. Frequency
c. Reactive Power
d. Real Power
c. Reactive Power
Geomagnetic Induced Currents ( GIC ) may cause which of the following when they travel into
the power system?
a. Decrease reactive power demand
b. Generator operations in the Lead
c. Increase of reactive power reserves
d. Transformer hot spot and over-heating
d. Transformer hot spot and over-heating
How often is a Reliability Coordinator required to perform Real - time assessments to identify an
SOL or IROL violation ?
a. 15 minutes
3
, b. 30 minutes
c. 60 minutes
d. 120 minutes
b. 30 minutes
A transmission line has capacitance reactance of 200 ohms and inductive reactance of 600 ohms ,
what is the net reactance of this line ?
a. 200 ohms
b. 400 ohms
c. 600 ohms
d. 800 ohms
b. 400 ohms
How many poles does a generator need if the RPM is 300 and the Generator Owner expects to
operate in the same 60.00 Hz system as a 4 pole , 1800 RPM generator ?
a. 12 poles
b. 18 poles
c. 24 poles
d. 48 poles
c. 24 poles
What is a Power System Stabilizer used for ?
a. Dampening low frequency oscillations
b. Correct the excitation system response to low frequency oscillations
c. Send corrective voltage signals to the AVR
d. All of these are correct
d. All of these are correct
When is it acceptable for the voltage to be reduced by 5% ?
a. To increase power transfers
b. When demand is high and needs to be reduced
c. When islanding
d. When generation is too high
b. When demand is high and needs to be reduced
You have requested an EEA to be declared by your Reliability Coordinator you have no sales and
there are no entities with generation to sell , which EEA are you in if you reserves and generation
to meet the peak and have implemented demand - side management have your contingency
procedures ?
4
BANK WITH ALL TESTING VERSIONS QUESTIONS AND
ANSWERS WITH A STUDY GUIDE | EXPERT VERIFIED FOR
GUARANTEED PASS | LATEST UPDATE
Generators will trip on an under - frequency condition of approximately 57.5 Hz . What is the
purpose of generator under-frequency trips?
a. To protect the turbine from damage
b. To protect the generator windings from overheating
c. To rebalance generation and load and arrest the frequency drop
d. To prevent islanding conditions
a. To protect the turbine from damage
What is the expected inrush of cold load ?
a . less than 5 times the MVA
b . up to 10 times the MVA
c . up to 20 times the MVA
d . no changes in MVA
b . up to 10 times the MVA
A Balancing Authority Area has two 800 MW generators , three 400 MW generators , and many
generators less than 200 MW . What is the MSSC for this Balancing Area ??
a. 1600 MW
b. 800 MW
c. 640 MW
d. 1200 MW
b. 800 MW
But 640MW is the reportable event threahold
Line A has an SOL of 250 MVA and is currently loaded at 200 MVA . Line B is and has an
LODF of 0.2 to Line A. If Line B relays out what will be the new power flow on Line A ? loaded
at 500 MVA
a. 300 MVA
b. 325 MVA
c. 290 MVA
d. 245 MVA
1
,a. 300 MVA
A Balancing Authority is in an EEA 1 , what must the Balancing Authority do prior to moving to
the next EEA Level ?
a. Inform the Transmission Operator and Reliability Coordinator
b. Ensure operating reserve in place , additional transaction purchases are scheduled , and all
available generation online
c. Shed all non - firm load
d. Ensure operating reserve in place , all purchases scheduled , and all non - firm load has been
shed
d. Ensure operating reserve in place , all purchases scheduled , and all non - firm load has been
shed
Line 1 SOL is 250 MVA , Line 3 has an OTDF of 0.25 to line 1. If line 3 relays out what will be
the SOMVAR Line 1 loading on Line 1 and will it be within its SOL limit ?
Line 1 - 200MVA, 50MVAR
Line 2 - 150MVA, 30MVAR
Line 3 - 300MVA, 0.25 OTDF
a . 220 / No
b . 250 / Yes
C. 275 / No
d . 275 / Yes
C. 275 / No
Which curve best represents the Ferranti effect ?
a. 1
b. 2
c. 3
d. 4
b. 2
Line gently goes up as Voltage get higher abd lines gets longer
A system operator is trying to synchronize lines A and B. Voltage at A is 125 kV and Voltage at B
is 115 kV . Reactive reserves are at their maximum output . What action should the system
operator take first ?
a. Increase Generation at B
b. Decrease Generation at A
2
,c. Shed Load electrical close to Station B
d. Increase Load at Station A
d. Increase Load at Station A
In ordered to be considered controllable load for contingency reserves the load must be ... ?
a . Non - Critical
b. SCADA Controlled
c. Able to reduce within a specific time period
d . Non - Firm Load
c. Able to reduce within a specific time period
On a transmission line that flows Station A to Station B. Station B is open and unable to close
due to excessively high voltage at Station B. What device can the system operator use at Station
A to mitigate this system problem ?
a. Insert a Shunt Capacitor
b. Insert a Series Capacitor
c. Insert Shunt Reactor
d. Bypass a Series Capacitor
c. Insert Shunt Reactor
Geomagnetic Disturbances effect the ability to control :
a. AGC
b. Frequency
c. Reactive Power
d. Real Power
c. Reactive Power
Geomagnetic Induced Currents ( GIC ) may cause which of the following when they travel into
the power system?
a. Decrease reactive power demand
b. Generator operations in the Lead
c. Increase of reactive power reserves
d. Transformer hot spot and over-heating
d. Transformer hot spot and over-heating
How often is a Reliability Coordinator required to perform Real - time assessments to identify an
SOL or IROL violation ?
a. 15 minutes
3
, b. 30 minutes
c. 60 minutes
d. 120 minutes
b. 30 minutes
A transmission line has capacitance reactance of 200 ohms and inductive reactance of 600 ohms ,
what is the net reactance of this line ?
a. 200 ohms
b. 400 ohms
c. 600 ohms
d. 800 ohms
b. 400 ohms
How many poles does a generator need if the RPM is 300 and the Generator Owner expects to
operate in the same 60.00 Hz system as a 4 pole , 1800 RPM generator ?
a. 12 poles
b. 18 poles
c. 24 poles
d. 48 poles
c. 24 poles
What is a Power System Stabilizer used for ?
a. Dampening low frequency oscillations
b. Correct the excitation system response to low frequency oscillations
c. Send corrective voltage signals to the AVR
d. All of these are correct
d. All of these are correct
When is it acceptable for the voltage to be reduced by 5% ?
a. To increase power transfers
b. When demand is high and needs to be reduced
c. When islanding
d. When generation is too high
b. When demand is high and needs to be reduced
You have requested an EEA to be declared by your Reliability Coordinator you have no sales and
there are no entities with generation to sell , which EEA are you in if you reserves and generation
to meet the peak and have implemented demand - side management have your contingency
procedures ?
4
