PJM Generation Dispatcher Exam Practice Questions
And Correct Answers
An EXCITER on a traditional generator does what? - ANSWER Voltage regulation (AVR)
if you change the excitation current, you change the voltage.
ECO Min, ECO Max, and EMERG Max are genrator _________________. - ANSWER Limits
When synchronizing to the interconnection, what needs to be synchronized? - ANSWER
Frequency, Voltage, and phase angle.
When does the GMD (GeoMagnetic Disturbance) procedure go into effect? - ANSWER
When 10A or greater is measured by special equipment at Missouri Ave or
Meadowbrook and the measurement is verified by one of the following other sources:
Excess transformer current @Meadowbrook, Beddington, Donbs or Black Oak, High
MVAR requirements on transformers @ Hopw Creek or Salem nuclear subs or High DC
measurements @ Limerick or Peach Bottom.
What are the 2 types of National Terrorism Advisory Alerts? - ANSWER Elevated and
Imminent.
What action does PJM take for a terrorist attack, fuel delivery emergency, or GMD's? -
ANSWER Conservative Operations
What does PJM put most emphasis on during a terrorist/sabotage event? - ANSWER
Operations and Communications
What does PJM request during a low voltage alert? - ANSWER RRC - reactive reserve
check
, Compared with implementation, at how many hours in advance does PJM issue a Heavy
Load Voltage Warning? - ANSWER 4 hours
During a High System Voltage Action, generation owners/operators, are supposed to -
ANSWER Operate at the lower bandwidth of the voltage schedule.
How many hours do you have to report a 24-hr reportable NERC disturbance? -
ANSWER 6 hours
What report is generated during a Max Emergency Gen Alert? - ANSWER SSR -
Supplementary Status Report
What section of the SSR is the Fuel Limited Resources counted against? - ANSWER Part
G Resource Limited Units which are units that cannot operate at maximum output for
more than 72 hours.
What type of Emergency Procedures occur during real time operating hours? - ANSWER
Actions
What is the pu for a 345 kV nominal voltage that is currently at 348 kV? - ANSWER
348/345 = 1.008 pu
What is the ERG if the Eco Min is 100 and the Emergency Min is 75? - ANSWER Eco Min -
Emerg Min = 25MW
How many Black Start units are needed for critical load/TO zone? - ANSWER 2 Black
Start units
What is the minimum amount of hours of fuel supply for Black Start units? - ANSWER 10
hours and it must notify PJM when it reaches that level.
And Correct Answers
An EXCITER on a traditional generator does what? - ANSWER Voltage regulation (AVR)
if you change the excitation current, you change the voltage.
ECO Min, ECO Max, and EMERG Max are genrator _________________. - ANSWER Limits
When synchronizing to the interconnection, what needs to be synchronized? - ANSWER
Frequency, Voltage, and phase angle.
When does the GMD (GeoMagnetic Disturbance) procedure go into effect? - ANSWER
When 10A or greater is measured by special equipment at Missouri Ave or
Meadowbrook and the measurement is verified by one of the following other sources:
Excess transformer current @Meadowbrook, Beddington, Donbs or Black Oak, High
MVAR requirements on transformers @ Hopw Creek or Salem nuclear subs or High DC
measurements @ Limerick or Peach Bottom.
What are the 2 types of National Terrorism Advisory Alerts? - ANSWER Elevated and
Imminent.
What action does PJM take for a terrorist attack, fuel delivery emergency, or GMD's? -
ANSWER Conservative Operations
What does PJM put most emphasis on during a terrorist/sabotage event? - ANSWER
Operations and Communications
What does PJM request during a low voltage alert? - ANSWER RRC - reactive reserve
check
, Compared with implementation, at how many hours in advance does PJM issue a Heavy
Load Voltage Warning? - ANSWER 4 hours
During a High System Voltage Action, generation owners/operators, are supposed to -
ANSWER Operate at the lower bandwidth of the voltage schedule.
How many hours do you have to report a 24-hr reportable NERC disturbance? -
ANSWER 6 hours
What report is generated during a Max Emergency Gen Alert? - ANSWER SSR -
Supplementary Status Report
What section of the SSR is the Fuel Limited Resources counted against? - ANSWER Part
G Resource Limited Units which are units that cannot operate at maximum output for
more than 72 hours.
What type of Emergency Procedures occur during real time operating hours? - ANSWER
Actions
What is the pu for a 345 kV nominal voltage that is currently at 348 kV? - ANSWER
348/345 = 1.008 pu
What is the ERG if the Eco Min is 100 and the Emergency Min is 75? - ANSWER Eco Min -
Emerg Min = 25MW
How many Black Start units are needed for critical load/TO zone? - ANSWER 2 Black
Start units
What is the minimum amount of hours of fuel supply for Black Start units? - ANSWER 10
hours and it must notify PJM when it reaches that level.
