PJM Test Questions & Answers 2025
Latest Update
Which of the following balancing control modes is used by PJM under normal
operations? - ANSWER Tie-Line Bias
Which of the following influences does PJM consider when performing their system load
forecast? - ANSWER Weather Conditions & Day of the Week
All of the following are limits that must be submitted to PJM for generating units
EXCEPT:
1. Eco Min
2. Eco Max
3. Emergency Max
4. Dynamic Instability - ANSWER Dynamic Instability
If PJM experienced an event that caused the loss of a 1,000 MW generator, which of
the following would most likely provide the quickest impact to improve the
undegenerating Area Control Area (ACE)?
1. Remedial Action Reserve
2. Synch Reserve
3. Non-Synch Reserve
4. Secondary Reserve - ANSWER Synch Reserve
Your system has experienced an event that caused the frequency to drop below 60.00
Hz, what would be the most likely event that occurred? - ANSWER A generator on your
system tripped offline
How does the PJM dispatcher inform the Members of the PJM regulation
Requirements? - ANSWER All-Call
In order for your generator to quality to supply regulation in the PJM Regulation market,
it must be able to respond and attain its desired output within how many minutes? -
ANSWER 5 minutes
Based on a generator capability curve, in order to maximize the MVAR output of the
generator, it may be necessary to: - ANSWER decrease the MW output of the unit
PJM maintains a regulation quality standard which states that a generator may be
certified to provide regulation only after it achieves three consecutive regulation test
scores of at least - ANSWER 75%
,Which of the following would NOT be a cause for a sudden deviation in the balancing
area ACE?
1. incorrect interchange number
2. loss of a tie-line RTU
3. loss of internal load
4. loss of adjacent control area generation - ANSWER loss of adjacent control area
generation
The primary purpose for the balancing area to have Regulation is to correct for: -
ANSWER small deviations in load
It is necessary for Generation Owner dispatchers to notify PJM of unplanned unit
outages: - ANSWER as soon as practicable
PJM should be made aware of any fuel shortage that a generator may experience.
This information assists in analyzing the resources and reliably operating the system. A
heightened awareness is expected during: - ANSWER extreme hot or cold conditions
Generators are required to obtain PJM approval prior to removing a generating unit from
service.
The only exception is for: - ANSWER injury to personnel will be prevented
Prior to removing a self-scheduled generator from service, the PJM member must first -
ANSWER give PJM the option to takeover the unit for the market
When PJM experiences problems with their primary digital control signal, it sometimes
becomes necessary for companies with the capability, to switch to the back-up signal.
This backup signal is known as: - ANSWER Analog control
When PJM sends cost signals to generators, to provide direction for increasing or
decreasing the facility output, this signal that is sent is known as: - ANSWER Dispatch
Rate
Under normal operating conditions, what is the limit that will provide the lowest output
level of a generating unit? - ANSWER Eco Min
When PJM send out a cost signal to generators to adjust their output, the generating
personnel adjust the output of the unit base on the unit's - ANSWER price or cost curve
incremental
Which eSuite tool is used to maintain individual generator regulation data that is
submitted by PJM members? - ANSWER eMarket
, PJM's ACE configuration is such, that when the ACE is positive (+), it indicates -
ANSWER too much generation
If a generator is self-scheduled, what is the minimum notification time required in order
for the MW output to be adjusted? - ANSWER 20 minutes prior to the change
When corrections are made for the time error and the system scheduled frequency must
be changed to implement the correction, how much is the frequency scheduled adjusted
by? - ANSWER + /- 0.02 Hz
When PJM runs their Regulation test, how long do the tests normally run? - ANSWER
40 minutes
Your system has a 300 MW steam unit, but due to oil deliveries, the on-site fuel supply
is diminishing.
What is the hourly threshold for reporting to PJM that the unit cannot operate at its
maximum capacity due to the fuel limitation? - ANSWER 72 hours
What is the regulation requirement for the PJM balancing area during on-peak hours? -
ANSWER 1.0% of the forecasted peak load
What is the time requirement that a generator that wishes to self-schedule itself must
provide to PJM? - ANSWER 20 minutes
The PJM Peak Period Maintenance season occurs: - ANSWER Between the 24th &
36th Wednesdays of the year
Maintenance outage extensions may be granted provided that the request for an
extension is made - ANSWER Prior to the end of the outage
What is the maximum time limit for the maintenance outages that occur during the PJM
Peak Period Maintenance season? - ANSWER 9 days
Which of the following is NOT a control mode that PJM considers? - ANSWER
Frequency Bias
What are the two NERC control standards that PJM must score at least 100% in order
to be compliant? - ANSWER DCS (Disturbance Control Standard) and CPS1
When PJM activates shared reserves with NPCC, what is the normal ramp of the MW
when the event is activated? - ANSWER 0 minutes
What is the regulation required for operating the PJM balancing area during the
midnight period? - ANSWER 1.0% of the forecasted peak load
Latest Update
Which of the following balancing control modes is used by PJM under normal
operations? - ANSWER Tie-Line Bias
Which of the following influences does PJM consider when performing their system load
forecast? - ANSWER Weather Conditions & Day of the Week
All of the following are limits that must be submitted to PJM for generating units
EXCEPT:
1. Eco Min
2. Eco Max
3. Emergency Max
4. Dynamic Instability - ANSWER Dynamic Instability
If PJM experienced an event that caused the loss of a 1,000 MW generator, which of
the following would most likely provide the quickest impact to improve the
undegenerating Area Control Area (ACE)?
1. Remedial Action Reserve
2. Synch Reserve
3. Non-Synch Reserve
4. Secondary Reserve - ANSWER Synch Reserve
Your system has experienced an event that caused the frequency to drop below 60.00
Hz, what would be the most likely event that occurred? - ANSWER A generator on your
system tripped offline
How does the PJM dispatcher inform the Members of the PJM regulation
Requirements? - ANSWER All-Call
In order for your generator to quality to supply regulation in the PJM Regulation market,
it must be able to respond and attain its desired output within how many minutes? -
ANSWER 5 minutes
Based on a generator capability curve, in order to maximize the MVAR output of the
generator, it may be necessary to: - ANSWER decrease the MW output of the unit
PJM maintains a regulation quality standard which states that a generator may be
certified to provide regulation only after it achieves three consecutive regulation test
scores of at least - ANSWER 75%
,Which of the following would NOT be a cause for a sudden deviation in the balancing
area ACE?
1. incorrect interchange number
2. loss of a tie-line RTU
3. loss of internal load
4. loss of adjacent control area generation - ANSWER loss of adjacent control area
generation
The primary purpose for the balancing area to have Regulation is to correct for: -
ANSWER small deviations in load
It is necessary for Generation Owner dispatchers to notify PJM of unplanned unit
outages: - ANSWER as soon as practicable
PJM should be made aware of any fuel shortage that a generator may experience.
This information assists in analyzing the resources and reliably operating the system. A
heightened awareness is expected during: - ANSWER extreme hot or cold conditions
Generators are required to obtain PJM approval prior to removing a generating unit from
service.
The only exception is for: - ANSWER injury to personnel will be prevented
Prior to removing a self-scheduled generator from service, the PJM member must first -
ANSWER give PJM the option to takeover the unit for the market
When PJM experiences problems with their primary digital control signal, it sometimes
becomes necessary for companies with the capability, to switch to the back-up signal.
This backup signal is known as: - ANSWER Analog control
When PJM sends cost signals to generators, to provide direction for increasing or
decreasing the facility output, this signal that is sent is known as: - ANSWER Dispatch
Rate
Under normal operating conditions, what is the limit that will provide the lowest output
level of a generating unit? - ANSWER Eco Min
When PJM send out a cost signal to generators to adjust their output, the generating
personnel adjust the output of the unit base on the unit's - ANSWER price or cost curve
incremental
Which eSuite tool is used to maintain individual generator regulation data that is
submitted by PJM members? - ANSWER eMarket
, PJM's ACE configuration is such, that when the ACE is positive (+), it indicates -
ANSWER too much generation
If a generator is self-scheduled, what is the minimum notification time required in order
for the MW output to be adjusted? - ANSWER 20 minutes prior to the change
When corrections are made for the time error and the system scheduled frequency must
be changed to implement the correction, how much is the frequency scheduled adjusted
by? - ANSWER + /- 0.02 Hz
When PJM runs their Regulation test, how long do the tests normally run? - ANSWER
40 minutes
Your system has a 300 MW steam unit, but due to oil deliveries, the on-site fuel supply
is diminishing.
What is the hourly threshold for reporting to PJM that the unit cannot operate at its
maximum capacity due to the fuel limitation? - ANSWER 72 hours
What is the regulation requirement for the PJM balancing area during on-peak hours? -
ANSWER 1.0% of the forecasted peak load
What is the time requirement that a generator that wishes to self-schedule itself must
provide to PJM? - ANSWER 20 minutes
The PJM Peak Period Maintenance season occurs: - ANSWER Between the 24th &
36th Wednesdays of the year
Maintenance outage extensions may be granted provided that the request for an
extension is made - ANSWER Prior to the end of the outage
What is the maximum time limit for the maintenance outages that occur during the PJM
Peak Period Maintenance season? - ANSWER 9 days
Which of the following is NOT a control mode that PJM considers? - ANSWER
Frequency Bias
What are the two NERC control standards that PJM must score at least 100% in order
to be compliant? - ANSWER DCS (Disturbance Control Standard) and CPS1
When PJM activates shared reserves with NPCC, what is the normal ramp of the MW
when the event is activated? - ANSWER 0 minutes
What is the regulation required for operating the PJM balancing area during the
midnight period? - ANSWER 1.0% of the forecasted peak load
