PJM Transmission Exam Study
Questions and Answers 100% Pass
During System Restoration, what is the optimal Frequency Range? - ANSWER✔✔-
59.75 - 61 Hz
The 500 kV system has normal bus voltages between? - ANSWER✔✔-500 to 550 kV
When Connecting 2 islands, the operator must match? - ANSWER✔✔-Voltage, Phase
Angle and Frequency
What are the Minimum Source Requirements for a 500kV line? (Gen/mile and
load/mile) - 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) - 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? -
ANSWER✔✔-Yes
What does SCADA stand for? - ANSWER✔✔-Supervisory Control & Data Acquisition
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,What does IROL stand for? - ANSWER✔✔-Interconnection Reliability Operating Limit
What does eDART stand for? - ANSWER✔✔-Dispatcher Application and Reporting
Tool
What is eDART used for? (Electronic Disp Reporting Tool) - 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? - ANSWER✔✔-From HIGH Voltage to LOW Voltage
What direction do MW flow? - 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
3) Historical Weather Data
4) Locational Marginal Pricing (LMP) Data - ANSWER✔✔-4
What one-way communication system is used to disseminate info to local call centers? -
ANSWER✔✔-All-Call
The 3 categories of messages issued by PJM All-Call all EXCEPT:
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,1) Operational
2) Informational
3) Conflicting Interchange Values
4) Emergency Procedures - ANSWER✔✔-3
When should, transmission outages should be submitted to PJM to avoid cancellation
and to be considered "on time?' - ANSWER✔✔-First day of Month Prior to the Outage
What report will be requested by PJM when a Max Generation Alert is issued? -
ANSWER✔✔-Supplementary Status Report (SSR)
The loss of a large generation unit on the PJM system can be detected by monitoring: -
ANSWER✔✔-Frequency and PJM Area Control Error (ACE)
The PJM system is operated such that the contingency flow is less than the: -
ANSWER✔✔-Emergency Rating
When ordered a 5% voltage reduction should be taken on: - ANSWER✔✔-The
Distribution System
TOs are required to report "Hot Line Work" on what voltage levels? - ANSWER✔✔-345
kV and Above
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, Load dump rating of an EHV line is determined by? - 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? - ANSWER✔✔-Yes
Which of the following factors influence load forecast (3)?
1) Weather
2) Temperature
3) Reactive Reserves
4) Day of the week - ANSWER✔✔-1, 2, 4
During system restoration, what is the voltage range the system should be kept
between? - ANSWER✔✔-90% and 105% maintain voltage profile between for system
restoration
PJM will coordinate and direct all restoration lines of what voltage levels? -
ANSWER✔✔-500kV and above
How much load would you dump to increase the frequency by 1 Hz (percentage
range)? - ANSWER✔✔-6-10%
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Questions and Answers 100% Pass
During System Restoration, what is the optimal Frequency Range? - ANSWER✔✔-
59.75 - 61 Hz
The 500 kV system has normal bus voltages between? - ANSWER✔✔-500 to 550 kV
When Connecting 2 islands, the operator must match? - ANSWER✔✔-Voltage, Phase
Angle and Frequency
What are the Minimum Source Requirements for a 500kV line? (Gen/mile and
load/mile) - 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) - 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? -
ANSWER✔✔-Yes
What does SCADA stand for? - ANSWER✔✔-Supervisory Control & Data Acquisition
Copyright ©SOPHIABENNETT 2025 ACADEMIC YEARALL RIGHTS RESERVED. Page 1/43
,What does IROL stand for? - ANSWER✔✔-Interconnection Reliability Operating Limit
What does eDART stand for? - ANSWER✔✔-Dispatcher Application and Reporting
Tool
What is eDART used for? (Electronic Disp Reporting Tool) - 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? - ANSWER✔✔-From HIGH Voltage to LOW Voltage
What direction do MW flow? - 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
3) Historical Weather Data
4) Locational Marginal Pricing (LMP) Data - ANSWER✔✔-4
What one-way communication system is used to disseminate info to local call centers? -
ANSWER✔✔-All-Call
The 3 categories of messages issued by PJM All-Call all EXCEPT:
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,1) Operational
2) Informational
3) Conflicting Interchange Values
4) Emergency Procedures - ANSWER✔✔-3
When should, transmission outages should be submitted to PJM to avoid cancellation
and to be considered "on time?' - ANSWER✔✔-First day of Month Prior to the Outage
What report will be requested by PJM when a Max Generation Alert is issued? -
ANSWER✔✔-Supplementary Status Report (SSR)
The loss of a large generation unit on the PJM system can be detected by monitoring: -
ANSWER✔✔-Frequency and PJM Area Control Error (ACE)
The PJM system is operated such that the contingency flow is less than the: -
ANSWER✔✔-Emergency Rating
When ordered a 5% voltage reduction should be taken on: - ANSWER✔✔-The
Distribution System
TOs are required to report "Hot Line Work" on what voltage levels? - ANSWER✔✔-345
kV and Above
Copyright ©SOPHIABENNETT 2025 ACADEMIC YEARALL RIGHTS RESERVED. Page 3/43
, Load dump rating of an EHV line is determined by? - 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? - ANSWER✔✔-Yes
Which of the following factors influence load forecast (3)?
1) Weather
2) Temperature
3) Reactive Reserves
4) Day of the week - ANSWER✔✔-1, 2, 4
During system restoration, what is the voltage range the system should be kept
between? - ANSWER✔✔-90% and 105% maintain voltage profile between for system
restoration
PJM will coordinate and direct all restoration lines of what voltage levels? -
ANSWER✔✔-500kV and above
How much load would you dump to increase the frequency by 1 Hz (percentage
range)? - ANSWER✔✔-6-10%
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