Exam (elaborations)
PJM Exam Questions and Answers 2024
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Exam of 10 pages for the course Pjm at Pjm (PJM Exam)
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PJM ExamWhat is the threshold for having a satellite phone? - answer500 MW
How often is reactive testing completed? - answer5 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 - answerLoss 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: - answerExtreme hot or cold conditions
If a fossil steam unit has less than 32 hours of fuel at max capacity, it should be bid at: -
answerMaximum 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 - answerACE and frequency will remain the
same
What is PJM's regulation requirement during
a system restoration? - answer2% of current load
What is the maximum time limit for outages that occur during the PJM Peak Period
Maintenance season? - answer9 Days
Maximum emergency generation is declared by PJM when which of the following
occurs? - answer20 MVA
When a data link is down, how often must PJM be updated? - answer30 minutes or
agreed upon change
, What must be done prior to removing a self scheduled unit from service? - answerGive
PJM option to take over the unit for the market
What is the purpose of an exciter? - answerControl 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 - answerLTC: Load Tap Changer
Operating reserve must equal the sum of: - answer1) Spinning
2) Quick Start
3) Secondary
In order to lower system voltage: - answerMW 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? - answerMinimize startups and no loads
Emergency reducible generation is defined as the difference between: - answerNormal
minimum generation and emergency minimum generation
Increasing frequency will increase what type of reactance? - answerInductance
Increasing frequency has no effect on: - answerResistance
What is the emergency threshold for reporting a steam unit as fuel limited? - answer72
Hours
What is an example of a quick start reserve? - answerHydroelectric
What 2 components make up contingency reserve? - answerSpinning and quick start
Partial system blackouts are characterized by
which of the following?
1) Most common type
2) May require coordinating multiple islands
3) Likely to result in transmission overloads or other issues
4) Affects a very large geographic area, and many customers
5) Most commonly caused by human or switching errors - answerLikely to result in
transmission overloads or other issues
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