PJM TRANSMISSION EXAM STUDY QUESTIONS WITH 100% CORRECT ANSWERS LATEST VERSION 2025/2026.

PJM TRANSMISSION EXAM STUDY
QUESTIONS WITH 100% CORRECT
ANSWERS LATEST VERSION 2025/2026.




During System Restoration, what is the optimal Frequency Range? - ANS 59.75 - 61 Hz



The 500 kV system has normal bus voltages between? - ANS 500 to 550 kV



When Connecting 2 islands, the operator must match? - ANS Voltage, Phase Angle and
Frequency



What are the Minimum Source Requirements for a 500kV line? (Gen/mile and load/mile) -
ANS 30 MW Gen/mile of energized 500 kV and 20 MW Load/mile of energized 500 kV



When will PJM issue a Minimum Generation Alert? (how many MW under normal operating
limits) - ANS When expected generation levels fall within 2500 MW of normal operating
limits



When a thunderstorm is nearing the BES should auto-reclosing be turned on? - ANS Yes



What does SCADA stand for? - ANS Supervisory Control & Data Acquisition


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,What does IROL stand for? - ANS Interconnection Reliability Operating Limit



What does eDART stand for? - ANS Dispatcher Application and Reporting Tool



What is eDART used for? (Electronic Disp Reporting Tool) - ANS It is used for: Generation
Outage Scheduling, Instantaneous Reserve Checks, Generator Reactive Capabilities and to enter
and submit switching



What direction do VARS flow? - ANS From HIGH Voltage to LOW Voltage



What direction do MW flow? - ANS From HIGH Phase Angle to LOW Phase Angle



Which of the following factors are NOT used in forecasting load?



1) Weather Forecast

2) Historical Load Forecast

3) Historical Weather Data

4) Locational Marginal Pricing (LMP) Data - ANS 4



What one-way communication system is used to disseminate info to local call centers? -
ANS All-Call



The 3 categories of messages issued by PJM All-Call all EXCEPT:



1) Operational


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,2) Informational

3) Conflicting Interchange Values

4) Emergency Procedures - ANS 3



When should, transmission outages should be submitted to PJM to avoid cancellation and to be
considered "on time?' - ANS First day of Month Prior to the Outage



What report will be requested by PJM when a Max Generation Alert is issued? -
ANS Supplementary Status Report (SSR)



The loss of a large generation unit on the PJM system can be detected by monitoring: -
ANS Frequency and PJM Area Control Error (ACE)



The PJM system is operated such that the contingency flow is less than the: - ANS Emergency
Rating



When ordered a 5% voltage reduction should be taken on: - ANS The Distribution System



TOs are required to report "Hot Line Work" on what voltage levels? - ANS 345 kV and Above



Load dump rating of an EHV line is determined by? - ANS 115% of the facility's 4 hour
Emergency Rating



During System Restoration, will closing additional tie lines increase the strength & stability of an
interconnected area? - ANS Yes



Which of the following factors influence load forecast (3)?


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, 1) Weather

2) Temperature

3) Reactive Reserves

4) Day of the week - ANS 1, 2, 4



During system restoration, what is the voltage range the system should be kept between? -
ANS 90% and 105% maintain voltage profile between for system restoration



PJM will coordinate and direct all restoration lines of what voltage levels? - ANS 500kV and
above



How much load would you dump to increase the frequency by 1 Hz (percentage range)? -
ANS 6-10%



Generation is disconnected after 5 seconds, when the frequency: - ANS Drops below 57.5Hz



How much of the total Dynamic Reserve should be used on Under Frequency relay load? -
ANS



During System Restoration, capacitor banks should be kept off until how much of the load is
restored? - ANS 40%



Would PJM assume Frequency Control when the control of an interconnected area is too
burdensome for any Local Control Center? - ANS Yes




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