PJM GENERATION DISPATCHER EXAM STUDY
GUIDE 2026 FULL QUESTIONS AND ANSWERS
GRADED A+
◉ The Transfer Limit Calculator (TLC) runs approximately how
often and establishes transfer limits for selected interfaces on the
PJM system?
a. 30-60 seconds b. 1-2 minutes c. 4-5 minutes d. 8-10 minutes.
Answer: c. 4-5 minutes
◉ All interchange transactions are modeled in the IDC and the IDC
calculates flow impacts of these transactions on each?
a. Flowgate b. Line c. Transformer d. Substation. Answer: a. Flowgate
◉ According to PJM, how many types of emergency messages can be
received?
a. Two b. Three c. Four d. Five. Answer: c. Four
◉ The sign convention for power flow used at PJM is positive for
power flow into PJM, in contrast to the NERC sign convention, in
which power flow into a balancing area is negative.
a. True b. False. Answer: True
,◉ How many modes of control are available to the PJM dispatcher
for the operation of the PJM RTO?
a. One b. Two c. Three d. Four. Answer: C Three
◉ Which form of control is unavailable to the dispatcher of the PJM
RTO?
a. Flat frequency control b. Flat tie line control c. Flat control d. Tie
line bias control. Answer: c. Flat control
◉ The DCS states that ACE must return either to zero or to its pre-
disturbance level within how many minutes following the start of
the disturbance?
a. 5 minutes b. 10 minutes c. 15 minutes d. 30 minutes. Answer: c. 15
minutes
◉ The difference between hourly net actual interchange and hourly
net scheduled interchange of a balancing authority is called?
a. Hourly inadvertent interchange b. Hourly interchange difference c.
Hourly cost d. Hourly interchange. Answer: a. Hourly inadvertent
interchange
◉ Generators that commit to provide black start service shall not
have their black start capable designation terminated within the
time of their commitment. PJM shall provide how much notice prior
to terminating the black start service of the unit?
, a. 6 weeks b. 6 months c. 1 year d. 2 years. Answer: d. 2 years
◉ The purpose of reserve generation is to enable PJM to restore tie
lines to a pre-contingency state within what time frame of a
contingency causing an imbalance between load and generation? a.
10 minutes b. 15 minutes c. 30 minutes d. 60 minutes. Answer: c. 30
minutes
◉ A manual load dump warning will be issued when
:a. Actual synchronized reserves are less than the synchronized
reserve requirement
b. Primary reserve is less than the largest generating unit or the loss
of a transmission facility jeopardizes reliability after all possible
measures have been taken to increase reserves
c. Primary reserves are less than the primary reserve requirement
d. PJM dispatchers can no longer match the decreasing load and
utilization of emergency reducible generation that is necessary.
Answer: b. Primary reserve is less than the largest generating unit or
the loss of a transmission facility jeopardizes reliability after all
possible measures have been taken to increase reserves
◉ What is the purpose of a capacity emergency warning? (Select 2)
a. To keep members informed of actual capacity shortages or
contingencies that may jeopardize reliability
b. To inform NERC of expected RTO status for future failure
GUIDE 2026 FULL QUESTIONS AND ANSWERS
GRADED A+
◉ The Transfer Limit Calculator (TLC) runs approximately how
often and establishes transfer limits for selected interfaces on the
PJM system?
a. 30-60 seconds b. 1-2 minutes c. 4-5 minutes d. 8-10 minutes.
Answer: c. 4-5 minutes
◉ All interchange transactions are modeled in the IDC and the IDC
calculates flow impacts of these transactions on each?
a. Flowgate b. Line c. Transformer d. Substation. Answer: a. Flowgate
◉ According to PJM, how many types of emergency messages can be
received?
a. Two b. Three c. Four d. Five. Answer: c. Four
◉ The sign convention for power flow used at PJM is positive for
power flow into PJM, in contrast to the NERC sign convention, in
which power flow into a balancing area is negative.
a. True b. False. Answer: True
,◉ How many modes of control are available to the PJM dispatcher
for the operation of the PJM RTO?
a. One b. Two c. Three d. Four. Answer: C Three
◉ Which form of control is unavailable to the dispatcher of the PJM
RTO?
a. Flat frequency control b. Flat tie line control c. Flat control d. Tie
line bias control. Answer: c. Flat control
◉ The DCS states that ACE must return either to zero or to its pre-
disturbance level within how many minutes following the start of
the disturbance?
a. 5 minutes b. 10 minutes c. 15 minutes d. 30 minutes. Answer: c. 15
minutes
◉ The difference between hourly net actual interchange and hourly
net scheduled interchange of a balancing authority is called?
a. Hourly inadvertent interchange b. Hourly interchange difference c.
Hourly cost d. Hourly interchange. Answer: a. Hourly inadvertent
interchange
◉ Generators that commit to provide black start service shall not
have their black start capable designation terminated within the
time of their commitment. PJM shall provide how much notice prior
to terminating the black start service of the unit?
, a. 6 weeks b. 6 months c. 1 year d. 2 years. Answer: d. 2 years
◉ The purpose of reserve generation is to enable PJM to restore tie
lines to a pre-contingency state within what time frame of a
contingency causing an imbalance between load and generation? a.
10 minutes b. 15 minutes c. 30 minutes d. 60 minutes. Answer: c. 30
minutes
◉ A manual load dump warning will be issued when
:a. Actual synchronized reserves are less than the synchronized
reserve requirement
b. Primary reserve is less than the largest generating unit or the loss
of a transmission facility jeopardizes reliability after all possible
measures have been taken to increase reserves
c. Primary reserves are less than the primary reserve requirement
d. PJM dispatchers can no longer match the decreasing load and
utilization of emergency reducible generation that is necessary.
Answer: b. Primary reserve is less than the largest generating unit or
the loss of a transmission facility jeopardizes reliability after all
possible measures have been taken to increase reserves
◉ What is the purpose of a capacity emergency warning? (Select 2)
a. To keep members informed of actual capacity shortages or
contingencies that may jeopardize reliability
b. To inform NERC of expected RTO status for future failure
