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PJM Transmission Exam Study Questions
and Correct Answers/ Latest Update /
Already Graded
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)
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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
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
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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:
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1) Operational
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:
All rights reserved © 2025/ 2026 |
PJM Transmission Exam Study Questions
and Correct Answers/ Latest Update /
Already Graded
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)
All rights reserved © 2025/ 2026 |
, Page |2
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
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
All rights reserved © 2025/ 2026 |
, Page |3
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:
All rights reserved © 2025/ 2026 |
, Page |4
1) Operational
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:
All rights reserved © 2025/ 2026 |
