PJM Exam UPDATED Exam Questions and
CORRECT Answers
What is the threshold for having a satellite phone? - CORRECT ANSWER 500 MW
How often is reactive testing completed? - CORRECT ANSWER 5 years
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 - CORRECT ANSWER Loss of adjacent
control area generation
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: - CORRECT ANSWER Extreme hot or cold conditions
If a fossil steam unit has less than 32 hours of fuel at max capacity, it should be bid at: -
CORRECT ANSWER Maximum Emergency
A tie line with MW flowing into the PJM control area trips. The system operator will see which
of the following occur?
1) Ace will decrease, frequency will decrease
2) ACE will increase, frequency will increase
3) ACE will decrease, frequency will remain the same
,4) ACE and frequency will remain the same - CORRECT ANSWER ACE and frequency
will remain the same
What is PJM's regulation requirement during
a system restoration? - CORRECT ANSWER 2% of current load
What is the maximum time limit for outages that occur during the PJM Peak Period Maintenance
season? - CORRECT ANSWER 9 Days
Maximum emergency generation is declared by PJM when which of the following occurs? -
CORRECT ANSWER 20 MVA
When a data link is down, how often must PJM be updated? - CORRECT ANSWER 30
minutes or agreed upon change
What must be done prior to removing a self scheduled unit from service? - CORRECT
ANSWER Give PJM option to take over the unit for the market
What is the purpose of an exciter? - CORRECT ANSWER Control voltage by controlling
VARs
The mechanical device on a transformer that controls deviation in voltage is called?
1) Primary winding
2) AVR
3) Load tap changer - CORRECT ANSWER LTC: Load Tap Changer
Operating reserve must equal the sum of: - CORRECT ANSWER 1) Spinning
2) Quick Start
, 3) Secondary
In order to lower system voltage: - CORRECT ANSWER MW must decrease to decrease
MVAR
PJM performs a Reliability Assessment Commitment starting with the results of the DA market.
What philosophy does PJM use when
performing this RAC? - CORRECT ANSWER Minimize startups and no loads
Emergency reducible generation is defined as the difference between: - CORRECT
ANSWER Normal minimum generation and emergency minimum generation
Increasing frequency will increase what type of reactance? - CORRECT
ANSWER Inductance
Increasing frequency has no effect on: - CORRECT ANSWER Resistance
What is the emergency threshold for reporting a steam unit as fuel limited? - CORRECT
ANSWER 72 Hours
What is an example of a quick start reserve? - CORRECT ANSWER Hydroelectric
What 2 components make up contingency reserve? - CORRECT ANSWER Spinning and
quick start
Partial system blackouts are characterized by
which of the following?
1) Most common type
CORRECT Answers
What is the threshold for having a satellite phone? - CORRECT ANSWER 500 MW
How often is reactive testing completed? - CORRECT ANSWER 5 years
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 - CORRECT ANSWER Loss of adjacent
control area generation
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: - CORRECT ANSWER Extreme hot or cold conditions
If a fossil steam unit has less than 32 hours of fuel at max capacity, it should be bid at: -
CORRECT ANSWER Maximum Emergency
A tie line with MW flowing into the PJM control area trips. The system operator will see which
of the following occur?
1) Ace will decrease, frequency will decrease
2) ACE will increase, frequency will increase
3) ACE will decrease, frequency will remain the same
,4) ACE and frequency will remain the same - CORRECT ANSWER ACE and frequency
will remain the same
What is PJM's regulation requirement during
a system restoration? - CORRECT ANSWER 2% of current load
What is the maximum time limit for outages that occur during the PJM Peak Period Maintenance
season? - CORRECT ANSWER 9 Days
Maximum emergency generation is declared by PJM when which of the following occurs? -
CORRECT ANSWER 20 MVA
When a data link is down, how often must PJM be updated? - CORRECT ANSWER 30
minutes or agreed upon change
What must be done prior to removing a self scheduled unit from service? - CORRECT
ANSWER Give PJM option to take over the unit for the market
What is the purpose of an exciter? - CORRECT ANSWER Control voltage by controlling
VARs
The mechanical device on a transformer that controls deviation in voltage is called?
1) Primary winding
2) AVR
3) Load tap changer - CORRECT ANSWER LTC: Load Tap Changer
Operating reserve must equal the sum of: - CORRECT ANSWER 1) Spinning
2) Quick Start
, 3) Secondary
In order to lower system voltage: - CORRECT ANSWER MW must decrease to decrease
MVAR
PJM performs a Reliability Assessment Commitment starting with the results of the DA market.
What philosophy does PJM use when
performing this RAC? - CORRECT ANSWER Minimize startups and no loads
Emergency reducible generation is defined as the difference between: - CORRECT
ANSWER Normal minimum generation and emergency minimum generation
Increasing frequency will increase what type of reactance? - CORRECT
ANSWER Inductance
Increasing frequency has no effect on: - CORRECT ANSWER Resistance
What is the emergency threshold for reporting a steam unit as fuel limited? - CORRECT
ANSWER 72 Hours
What is an example of a quick start reserve? - CORRECT ANSWER Hydroelectric
What 2 components make up contingency reserve? - CORRECT ANSWER Spinning and
quick start
Partial system blackouts are characterized by
which of the following?
1) Most common type
