Download NERC Prep Test 1 (200 Questions) PDF | 2026 Exam Questions & Answers and more Exams Power Electronics in PDF only on Docsity!
ANSWERS
- If a S00 kV transmission line with a surge impedance loading of 800 MW is currently loaded at 1 400 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>ANS a. Generator MVAR output would increase
- When system conditions are such that emergency procedures are expect- ed 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>ANS c. Return outaged equipment to service
- If your transmission path is rated for 1 200 MW and 1 000 MW are scheduled on it, but due to parallel flows the actual flow is 1 300 MW, what action should you take?
ANSWERS
a. Request that a phase shifting transformer be installed
b. Reduce interchange transactions impacting the path
ANSWERS
parameters
d. Reduce voltages on the transmission system>ANS c. Raise system voltages as high as possible, but within their operating parameters
- Which of the following actions should you take if an outage on a neigh- boring 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>ANS b. Ask the Reliability Coordi- nator for assistance
- 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>ANS c. Inform the Reliability Coordinator
- While performing a pre-outage study, you identify that the transmission
ANSWERS
outage will cause a thermal violation on a parallel path, which of the following actions would be the first one you would implement?
ANSWERS
1 0. 1 0. 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>ANS b. Balancing Authorities
c. Transmission Operators
1 1. 1 1. 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>ANS c. A net increase of MW would go out of your BAs system 1 2. 1 2. According to the NERC Glossary, a constrained facility is defined as a transmission facility that is approaching, is at, or is beyond its?
ANSWERS
a. SOL or IROL
b. Normal voltage parameters
c. Available Transfer Capability
ANSWERS
1 5. 1 5. If your system is experiencing high system loads, high system imports, and transmission facilities loaded to 1 00%, 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>ANS b. An internal generator tripping 1 6. 1 6. 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. 1 25 MW
c. 250 MW
d. 500 MW>ANS b. 1 25 MW
1 7. 1 7. If a transmission path is congested and it is determined that all curtail- able transactions have a 1 5% affect on the path, how many MW of transactions must be curtailed if 30 MW of relief is needed?
ANSWERS
a. 1 5 MW
b. 30 MW
ANSWERS
c. Within 24 hours
d. Within 30 days>ANS c. Within 24 hours
- 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. 1 0 days
d. 1 4 days>ANS b. 5 days
- 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
c. Any impacted system
d. NERC>ANS c. Any impacted system
- How is the reactive output of the generator increased?
ANSWERS
a. By raising the power factor
b. By adjusting the governor control manually
c. By adjusting the generator excitation
d. By changing the speed of the turbine>ANS c. By adjusting the generator
ANSWERS
a. Shunt reactors
b. Synchronous condenser
c. Generator
d. Capacitors>ANS a. Shunt reactors
- You report for work on a peak summer day with expected high temper- atures and load. What can you do to maintain an adequate system profile?
a. Switch reactors in service to remove the peak
b. Request all generators to reserve MVAR for the peak
c. Switch all capacitors in service without regard to voltage levels
d. Get under the voltage by placing capacitors in service while maintaining operating limits>ANS d. Get under the voltage by placing capacitors in service while maintaining operating limits
- What will be the reactive power output of a 200 MVAR shunt capacitor energized at 90% of its nominal voltage?
a. 1 20 MVAR
b. 1 50 MVAR
c. 1 62 MVAR
ANSWERS
d. 1 80 MVAR>ANS c. 1 62 MVAR
- When system conditions have caused the depletion of the system
reactive reserves, when should the reserves be restored?
ANSWERS
c. Current transformer
d. Potential transformer>ANS b. Static Var Compensators
- If it is desired to have a generator operate in the LEAD, what must the Generator Operator do to the generator?
a. Increase the excitation
b. Increase the hydrogen pressure
c. Decrease the excitation
d. Decrease the hydrogen temperature>ANS c. Decrease the excitation
- Which of the following reactive devices would be considered to be a dynamic reactive resource?
a. Transformer
b. Shunt reactor
c. Shunt capacitor
d. Generator>ANS d. Generator
- If the applied voltage of a capacitor experiences a 1 0% reduction from the rated voltage, what will be the impact on the capacitor output?
a. It will be increased by 1 0%
b. It will remain unchanged
ANSWERS
c. It will be reduced by 1 0%
d. It will be reduced by more than 1 0%>ANS d. It will be reduced by more than
