PJM Transmission Exam Study Questions
and Answers Graded A+
During System Restoration, what is the optimal Frequency Range? - Correct
answer-59.75 - 61 Hz
The 500 kV system has normal bus voltages between? - Correct answer-500 to 550
kV
When Connecting 2 islands, the operator must match? - Correct answer-Voltage,
Phase Angle and Frequency
What are the Minimum Source Requirements for a 500kV line? (Gen/mile and
load/mile) - Correct answer-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) - Correct answer-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? -
Correct answer-Yes
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,What does SCADA stand for? - Correct answer-Supervisory Control & Data
Acquisition
What does IROL stand for? - Correct answer-Interconnection Reliability Operating
Limit
What does eDART stand for? - Correct answer-Dispatcher Application and
Reporting Tool
What is eDART used for? (Electronic Disp Reporting Tool) - Correct answer-It is
used for: Generation Outage Scheduling, Instantaneous Reserve Checks, Generator
Reactive Capabilities and to enter and submit switching
What direction do VARS flow? - Correct answer-From HIGH Voltage to LOW
Voltage
What direction do MW flow? - Correct answer-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
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,3) Historical Weather Data
4) Locational Marginal Pricing (LMP) Data - Correct answer-4
What one-way communication system is used to disseminate info to local call
centers? - Correct answer-All-Call
The 3 categories of messages issued by PJM All-Call all EXCEPT:
1) Operational
2) Informational
3) Conflicting Interchange Values
4) Emergency Procedures - Correct answer-3
When should, transmission outages should be submitted to PJM to avoid
cancellation and to be considered "on time?' - Correct answer-First day of Month
Prior to the Outage
What report will be requested by PJM when a Max Generation Alert is issued? -
Correct answer-Supplementary Status Report (SSR)
The loss of a large generation unit on the PJM system can be detected by
monitoring: - Correct answer-Frequency and PJM Area Control Error (ACE)
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, The PJM system is operated such that the contingency flow is less than the: -
Correct answer-Emergency Rating
When ordered a 5% voltage reduction should be taken on: - Correct answer-The
Distribution System
TOs are required to report "Hot Line Work" on what voltage levels? - Correct
answer-345 kV and Above
Load dump rating of an EHV line is determined by? - Correct answer-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? - Correct answer-Yes
Which of the following factors influence load forecast (3)?
1) Weather
2) Temperature
3) Reactive Reserves
4) Day of the week - Correct answer-1, 2, 4
©COPYRIGHT 2025, ALL RIGHTS RESERVED 4
and Answers Graded A+
During System Restoration, what is the optimal Frequency Range? - Correct
answer-59.75 - 61 Hz
The 500 kV system has normal bus voltages between? - Correct answer-500 to 550
kV
When Connecting 2 islands, the operator must match? - Correct answer-Voltage,
Phase Angle and Frequency
What are the Minimum Source Requirements for a 500kV line? (Gen/mile and
load/mile) - Correct answer-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) - Correct answer-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? -
Correct answer-Yes
©COPYRIGHT 2025, ALL RIGHTS RESERVED 1
,What does SCADA stand for? - Correct answer-Supervisory Control & Data
Acquisition
What does IROL stand for? - Correct answer-Interconnection Reliability Operating
Limit
What does eDART stand for? - Correct answer-Dispatcher Application and
Reporting Tool
What is eDART used for? (Electronic Disp Reporting Tool) - Correct answer-It is
used for: Generation Outage Scheduling, Instantaneous Reserve Checks, Generator
Reactive Capabilities and to enter and submit switching
What direction do VARS flow? - Correct answer-From HIGH Voltage to LOW
Voltage
What direction do MW flow? - Correct answer-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
©COPYRIGHT 2025, ALL RIGHTS RESERVED 2
,3) Historical Weather Data
4) Locational Marginal Pricing (LMP) Data - Correct answer-4
What one-way communication system is used to disseminate info to local call
centers? - Correct answer-All-Call
The 3 categories of messages issued by PJM All-Call all EXCEPT:
1) Operational
2) Informational
3) Conflicting Interchange Values
4) Emergency Procedures - Correct answer-3
When should, transmission outages should be submitted to PJM to avoid
cancellation and to be considered "on time?' - Correct answer-First day of Month
Prior to the Outage
What report will be requested by PJM when a Max Generation Alert is issued? -
Correct answer-Supplementary Status Report (SSR)
The loss of a large generation unit on the PJM system can be detected by
monitoring: - Correct answer-Frequency and PJM Area Control Error (ACE)
©COPYRIGHT 2025, ALL RIGHTS RESERVED 3
, The PJM system is operated such that the contingency flow is less than the: -
Correct answer-Emergency Rating
When ordered a 5% voltage reduction should be taken on: - Correct answer-The
Distribution System
TOs are required to report "Hot Line Work" on what voltage levels? - Correct
answer-345 kV and Above
Load dump rating of an EHV line is determined by? - Correct answer-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? - Correct answer-Yes
Which of the following factors influence load forecast (3)?
1) Weather
2) Temperature
3) Reactive Reserves
4) Day of the week - Correct answer-1, 2, 4
©COPYRIGHT 2025, ALL RIGHTS RESERVED 4
