NERC PREP TEST 101 2022/2023 QUESTIONS AND
ANSWERS(200 q’s and ans)
1. If a 500 kV transmission line with a surge impedance loading of 800 MW is
currently loaded at 1400 MW, which of the following events would most likely
occur?
a. Generator MVAR output would increase
b. All system capacitors would trip off-line
c. Generator MVAR output would decrease
d. All automatic reactors would connect to the system
a. Generator MVAR output would increase
2. When system conditions are such that emergency procedures are expected to
be implemented, which of the following actions should be considered first?
a. Shed firm load
b. Implement Active Load Management
c. Return outaged equipment to service
d. Request a voltage reduction
c. Return outaged equipment to service
3. If your transmission path is rated for 1200 MW and 1000 MW are scheduled on
it, but due to parallel flows the actual flow is 1300 MW, what action should you
take?
a. Request that a phase shifting transformer be installed
b. Reduce interchange transactions impacting the path
c. Request all parallel flow to PSEs to increase schedules
d. Reduce all commercial customer load
b. Reduce interchange transactions impacting the path
4. If your system is MVAR deficient, what action could be implemented to prevent
voltage collapse?
a. Raise system frequency above 60.5 Hz
b. Shed firm load in the deficient area
c. Separate from the Interconnection
d. Lower transmission voltages
b. Shed firm load in the deficient area
5. Which of the following actions can a system operator take in order to maintain
stability on the system?
a. Request generators to absorb maximum MVAR
b. Place all operating limits on dynamic calculation
c. Raise system voltages as high as possible, but within their operating
parameters
d. Reduce voltages on the transmission system
,c. Raise system voltages as high as possible, but within their operating parameters
6. Which of the following actions should you take if an outage on a neighboring
system has caused a violation on your system?
a. Open all tie-lines to your neighbor
b. Ask the Reliability Coordinator for assistance
c. Shed load to mitigate the violation
d. Wait for the neighboring system to contact you
b. Ask the Reliability Coordinator for assistance
7. If a SOL or IROL violation occurs due to transfers across the system and it is
determined that parallel flows are contributing to the violation, what should the
system operator do?
a. Place all system capacitors in service
b. Reduce system load
c. Inform the Reliability Coordinator
d. Dump firm load
c. Inform the Reliability Coordinator
8. While performing a pre-outage study, you identify that the transmission outage
will cause a thermal violation on a parallel path, which of the following actions
would be the first one you would implement?
a. Shed load to mitigate the concern
b. Allow the outage to occur and see what happens
c. Reschedule the outage if possible
d. Allow the outage to take place as long as no load is lost
c. Reschedule the outage if possible
9. Which of the following actions should the system operator implement first if
transmission line limits exceed the facilities emergency limits based on a
contingency that has not yet occurred, but their protocols are to respond on a
pre-contingency basis?
a. Reduce voltages in the area of the violation
b. Remove the facility from service
c. Curtail any interchange transactions that are curtailable
d. Only implement actions if the contingency occurs
c. Curtail any interchange transactions that are curtailable
10. If a Reliability Coordinator had to implement any type of line loading relief
procedures, which of the following entities would they be coordinated with? Pick
two.
a. Purchasing Selling Entities
b. Balancing Authorities
c. Transmission Operators
d. Load Serving Entities
,b. Balancing Authorities
c. Transmission Operators
11. If a generator is lost in a neighboring Balancing Area, what would the impact
be on the BAs transmission tie lines?
a. Nothing
b. A net increase of MW would come into your BAs system
c. A net increase of MW would go out of your BAs system
d. They would exceed their emergency limits
c. A net increase of MW would go out of your BAs system
12. According to the NERC Glossary, a constrained facility is defined as a
transmission facility that is approaching, is at, or is beyond its?
a. SOL or IROL
b. Normal voltage parameters
c. Available Transfer Capability
d. Economic operating point
a. SOL or IROL
13. How should a Transmission Operator that is affected by or contributing to
transmission SOL or IROL limit violations respond to the situation?
a. When time permits
b. In coordination with other impacted entities
c. Independent of all other parties
d. Only at the direction of the Reliability Coordinator
b. In coordination with other impacted entities
14. If a transmission operator is experiencing a SOL or IROL violation, how long
does the entity have to correct the problem?
a. 10 minutes
b. 20 minutes
c. 30 minutes
d. 60 minutes
c. 30 minutes
15. If your system is experiencing high system loads, high system imports, and
transmission facilities loaded to 100%, which of the following situations would
make the situation worse?
a. Loss of a distribution station
b. An internal generator tripping
c. A bulk capacitor connecting to the system
d. A 500 kV transmission line returned to service
b. An internal generator tripping
16. If a transmission line has a flow of 500 MW and the LODF for a parallel line
due to the loss of this line is .25, how many MW will shift to this line if the line
relays out of service?
, a. 50 MW
b. 125 MW
c. 250 MW
d. 500 MW
b. 125 MW
17. If a transmission path is congested and it is determined that all curtailable
transactions have a 15% affect on the path, how many MW of transactions must
be curtailed if 30 MW of relief is needed?
a. 15 MW
b. 30 MW
c. 100 MW
d. 200 MW
d. 200 MW
18. If a transmission line is violating its emergency thermal limit due to the
tripping of a parallel line which of the following is NOT an appropriate action to
implement?
a. Shift generation
b. Implement ALM
c. Shed load
d. Adjust the thermal ratings
d. Adjust the thermal ratings
19. According to NERC standards, disturbances that are not identified until
sometime after the occur must be reported to NERC
a. Immediately
b. Within 12 hours
c. Within 24 hours
d. Within 30 days
c. Within 24 hours
20. According to NERC Standards, Transmission Operators and Balancing
Authorities must provide their operating personnel with a minimum of how much
training annually?
a. 2 days
b. 5 days
c. 10 days
d. 14 days
b. 5 days
21. If a major transmission facility were to relay out of service, who is the system
operator to inform?
a. Only local management
b. All entities in the Interconnection
ANSWERS(200 q’s and ans)
1. If a 500 kV transmission line with a surge impedance loading of 800 MW is
currently loaded at 1400 MW, which of the following events would most likely
occur?
a. Generator MVAR output would increase
b. All system capacitors would trip off-line
c. Generator MVAR output would decrease
d. All automatic reactors would connect to the system
a. Generator MVAR output would increase
2. When system conditions are such that emergency procedures are expected to
be implemented, which of the following actions should be considered first?
a. Shed firm load
b. Implement Active Load Management
c. Return outaged equipment to service
d. Request a voltage reduction
c. Return outaged equipment to service
3. If your transmission path is rated for 1200 MW and 1000 MW are scheduled on
it, but due to parallel flows the actual flow is 1300 MW, what action should you
take?
a. Request that a phase shifting transformer be installed
b. Reduce interchange transactions impacting the path
c. Request all parallel flow to PSEs to increase schedules
d. Reduce all commercial customer load
b. Reduce interchange transactions impacting the path
4. If your system is MVAR deficient, what action could be implemented to prevent
voltage collapse?
a. Raise system frequency above 60.5 Hz
b. Shed firm load in the deficient area
c. Separate from the Interconnection
d. Lower transmission voltages
b. Shed firm load in the deficient area
5. Which of the following actions can a system operator take in order to maintain
stability on the system?
a. Request generators to absorb maximum MVAR
b. Place all operating limits on dynamic calculation
c. Raise system voltages as high as possible, but within their operating
parameters
d. Reduce voltages on the transmission system
,c. Raise system voltages as high as possible, but within their operating parameters
6. Which of the following actions should you take if an outage on a neighboring
system has caused a violation on your system?
a. Open all tie-lines to your neighbor
b. Ask the Reliability Coordinator for assistance
c. Shed load to mitigate the violation
d. Wait for the neighboring system to contact you
b. Ask the Reliability Coordinator for assistance
7. If a SOL or IROL violation occurs due to transfers across the system and it is
determined that parallel flows are contributing to the violation, what should the
system operator do?
a. Place all system capacitors in service
b. Reduce system load
c. Inform the Reliability Coordinator
d. Dump firm load
c. Inform the Reliability Coordinator
8. While performing a pre-outage study, you identify that the transmission outage
will cause a thermal violation on a parallel path, which of the following actions
would be the first one you would implement?
a. Shed load to mitigate the concern
b. Allow the outage to occur and see what happens
c. Reschedule the outage if possible
d. Allow the outage to take place as long as no load is lost
c. Reschedule the outage if possible
9. Which of the following actions should the system operator implement first if
transmission line limits exceed the facilities emergency limits based on a
contingency that has not yet occurred, but their protocols are to respond on a
pre-contingency basis?
a. Reduce voltages in the area of the violation
b. Remove the facility from service
c. Curtail any interchange transactions that are curtailable
d. Only implement actions if the contingency occurs
c. Curtail any interchange transactions that are curtailable
10. If a Reliability Coordinator had to implement any type of line loading relief
procedures, which of the following entities would they be coordinated with? Pick
two.
a. Purchasing Selling Entities
b. Balancing Authorities
c. Transmission Operators
d. Load Serving Entities
,b. Balancing Authorities
c. Transmission Operators
11. If a generator is lost in a neighboring Balancing Area, what would the impact
be on the BAs transmission tie lines?
a. Nothing
b. A net increase of MW would come into your BAs system
c. A net increase of MW would go out of your BAs system
d. They would exceed their emergency limits
c. A net increase of MW would go out of your BAs system
12. According to the NERC Glossary, a constrained facility is defined as a
transmission facility that is approaching, is at, or is beyond its?
a. SOL or IROL
b. Normal voltage parameters
c. Available Transfer Capability
d. Economic operating point
a. SOL or IROL
13. How should a Transmission Operator that is affected by or contributing to
transmission SOL or IROL limit violations respond to the situation?
a. When time permits
b. In coordination with other impacted entities
c. Independent of all other parties
d. Only at the direction of the Reliability Coordinator
b. In coordination with other impacted entities
14. If a transmission operator is experiencing a SOL or IROL violation, how long
does the entity have to correct the problem?
a. 10 minutes
b. 20 minutes
c. 30 minutes
d. 60 minutes
c. 30 minutes
15. If your system is experiencing high system loads, high system imports, and
transmission facilities loaded to 100%, which of the following situations would
make the situation worse?
a. Loss of a distribution station
b. An internal generator tripping
c. A bulk capacitor connecting to the system
d. A 500 kV transmission line returned to service
b. An internal generator tripping
16. If a transmission line has a flow of 500 MW and the LODF for a parallel line
due to the loss of this line is .25, how many MW will shift to this line if the line
relays out of service?
, a. 50 MW
b. 125 MW
c. 250 MW
d. 500 MW
b. 125 MW
17. If a transmission path is congested and it is determined that all curtailable
transactions have a 15% affect on the path, how many MW of transactions must
be curtailed if 30 MW of relief is needed?
a. 15 MW
b. 30 MW
c. 100 MW
d. 200 MW
d. 200 MW
18. If a transmission line is violating its emergency thermal limit due to the
tripping of a parallel line which of the following is NOT an appropriate action to
implement?
a. Shift generation
b. Implement ALM
c. Shed load
d. Adjust the thermal ratings
d. Adjust the thermal ratings
19. According to NERC standards, disturbances that are not identified until
sometime after the occur must be reported to NERC
a. Immediately
b. Within 12 hours
c. Within 24 hours
d. Within 30 days
c. Within 24 hours
20. According to NERC Standards, Transmission Operators and Balancing
Authorities must provide their operating personnel with a minimum of how much
training annually?
a. 2 days
b. 5 days
c. 10 days
d. 14 days
b. 5 days
21. If a major transmission facility were to relay out of service, who is the system
operator to inform?
a. Only local management
b. All entities in the Interconnection
