PJM TRANSMISSION TEST EXAM
QUESTIONS WITH 100% CORRECT
ANSWERS LATEST VERSION 2025/2026.
When is Manual Load Dump Warning issued? - ANS available primary reserve capacity is less
than the largest operating generator or the loss of a transmission facility jeopardizes reliable
operations after all other possible measures are taken to increase reserve
Why is a Voltage Reduction used? - ANS PJM dispatcher issues the order for a 5% voltage
reduction on the DISTRIBUTION system. Used to increase transmission system voltages by
lowering the distribution system voltages
When is Primary Reserve Warning issued? - ANS The purpose of the Primary Reserve
Warning is to warn members that the available primary reserve is less than required and
present operations are becoming critical. It is implemented when available primary reserve
capacity is less than the primary reserve requirement, but greater than the synchronized
reserve requirement.
At what Frequency (Hz) do generators trip offline due to under frequency? - ANS 57.5 Hz
When is Minimum Generation Alert issued? - ANS Minimum Generation Alert is
implemented when the expected generation level is within 2,500 MW of normal minimum
energy limits.
1 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
, Under normal conditions, when is a generator considered Fuel Limited Generation? How many
hours of run time left? - ANS Generally, any fuel or resource restricted unit (< 72 burn hours
at max capacity, see Section
6 of this manual) should be classified as Fuel Limited Generation.
What category should Furl Limited Resources be placed in during a Cold or Hot Weather Alert? -
ANS Units bid to the PJM Market when Conservative Operations/Cold or Hot Weather Alert
have been declared and PJM Dispatch requests Fuel Limited Resources be placed into the
Maximum Emergency Generation Category.
At what projected temperature will PJM issue a Hot Weather Alert? - ANS 90 degrees F or
more
What locations does PJM monitor for Solar Magnetic Disturbances? How many amps
measurement is required? - ANS Solar Magnetic Disturbances
geomagnetic storm is detected that produces a DC measurement at Missouri Avenue in Atlantic
City and/or Meadow Brook Station near Winchester, Virginia at a magnitude greater than 10
amps and PJM dispatcher confirms that this measurement is a result of a severe geomagnetic
storm by checking additional sources of information.
At what PJM Security threat level will PJM consider staffing selected substations for
communications? - ANS PJM SECURITY RED / Severe
- Consider staffing selected substations for communications
- Consider staffing critical combustion turbine sites
How many hours can the Emergency Mandatory Load Management Reductions system be
implemented per day? - ANS Emergency Mandatory Load Management Reductions
Are available from June through September, interruptions may be called for up to six hours in
duration between the hours of 12:00 (Noon) to 20:00 (08:00 PM) on weekdays, other than PJM
2 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
QUESTIONS WITH 100% CORRECT
ANSWERS LATEST VERSION 2025/2026.
When is Manual Load Dump Warning issued? - ANS available primary reserve capacity is less
than the largest operating generator or the loss of a transmission facility jeopardizes reliable
operations after all other possible measures are taken to increase reserve
Why is a Voltage Reduction used? - ANS PJM dispatcher issues the order for a 5% voltage
reduction on the DISTRIBUTION system. Used to increase transmission system voltages by
lowering the distribution system voltages
When is Primary Reserve Warning issued? - ANS The purpose of the Primary Reserve
Warning is to warn members that the available primary reserve is less than required and
present operations are becoming critical. It is implemented when available primary reserve
capacity is less than the primary reserve requirement, but greater than the synchronized
reserve requirement.
At what Frequency (Hz) do generators trip offline due to under frequency? - ANS 57.5 Hz
When is Minimum Generation Alert issued? - ANS Minimum Generation Alert is
implemented when the expected generation level is within 2,500 MW of normal minimum
energy limits.
1 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
, Under normal conditions, when is a generator considered Fuel Limited Generation? How many
hours of run time left? - ANS Generally, any fuel or resource restricted unit (< 72 burn hours
at max capacity, see Section
6 of this manual) should be classified as Fuel Limited Generation.
What category should Furl Limited Resources be placed in during a Cold or Hot Weather Alert? -
ANS Units bid to the PJM Market when Conservative Operations/Cold or Hot Weather Alert
have been declared and PJM Dispatch requests Fuel Limited Resources be placed into the
Maximum Emergency Generation Category.
At what projected temperature will PJM issue a Hot Weather Alert? - ANS 90 degrees F or
more
What locations does PJM monitor for Solar Magnetic Disturbances? How many amps
measurement is required? - ANS Solar Magnetic Disturbances
geomagnetic storm is detected that produces a DC measurement at Missouri Avenue in Atlantic
City and/or Meadow Brook Station near Winchester, Virginia at a magnitude greater than 10
amps and PJM dispatcher confirms that this measurement is a result of a severe geomagnetic
storm by checking additional sources of information.
At what PJM Security threat level will PJM consider staffing selected substations for
communications? - ANS PJM SECURITY RED / Severe
- Consider staffing selected substations for communications
- Consider staffing critical combustion turbine sites
How many hours can the Emergency Mandatory Load Management Reductions system be
implemented per day? - ANS Emergency Mandatory Load Management Reductions
Are available from June through September, interruptions may be called for up to six hours in
duration between the hours of 12:00 (Noon) to 20:00 (08:00 PM) on weekdays, other than PJM
2 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
