PJM Practice Test
What device is installed as a power factor correction?
A.
B.
C.
D.
Reactor
Capacitor
SVC
Transformer
If you have an open ended line, what would the voltage level look like?
A.
B.
C.
D.
Voltage higher on open end of the line
Voltage higher on closed end of the line
Voltage the same throughout the line
Voltage higher in the middle of the line
How long does battery banks need to be able to stay online at a substation?
A.
B.
C.
D.
6 hours
8 hours
12 hours
16 hours
Who is responsible for communicating voltage schedules to Generation Owners?
A.
B.
C.
D.
GO
TO
PJM
NERC
An EHV line is loaded above its SIL (surge impedance loading). This line can be considered:
A. A VAR load
B. A VAR source
C. A Contingency violation
D. Over its STE
What would be the expected results from the tripping of a 1,000 MW generator outside of the PJM balancing
area, but within the Interconnection?
A. Frequency would drop and the PJM ACE would indicate 1,000 MW under-generation
B. Frequency would drop and the PJM ACE would also indicate under-generation
C. Frequency and PJM ACE would remain the same
D. Frequency would drop, but the PJM ACE would remain unchanged
What are the advantages of a carrier scheme on a transmission line? Provides high-speed fault clearing all
the way to the end of the line
If a 100 Mvar capacitor (rated 100 Mvar at 345 kV) is in service at a voltage of 340 kV, what
would the capacitor output be?
A. 94MVAR
B. 96MVAR
C. 97MVAR
D. 100MVAR
If you are issued a PCCLRW and the contingency happens, what would your response be as a
TO?
A. Immediately shed load
B. Respond to a directed from PJM to shed load
C. Wait to see if contingency goes over Load dump limit
D. Do nothing
At what voltage should a TO notify PJM when switching a capacitor?
A. 100kv
B. 130kv
C. 230kv
D. 345kv
What impact would a fault have on motor load?
A. Loss of functionality
B. Reduced capability
C. Remains constant
If you have lost voice communications for 30 minutes, how long to notify pjm?
A. 30 minutes
B. 15 minutes
C. 5 minutes
D. 60 minutes
Motor load is more depended on?
A. Voltage
B. MW
C. MVAR
D. Frequency
If you have a 500kv line above its SOL and line loading is increasing?
A. Reactive losses decrease based on the square of the current and reactive supply
increases based on the square of the voltage
B. Reactive losses increase based on the square of the square of the current and reactive
supply decreases based on the square of the voltage
C. Reactive supply increases based on the square of the current, voltage drops
A manual load dump for capacity shortages is initiated
A. Across the entire RTO on a load-ratio basis
B. Only in control zones with a deficient energy position
C. Only in mid-Atlantic region
D. Only where it will be effective to unload the transmission line
If your contingency analysis stops working, how long to communicate this to pjm?
A. 5 minutes
B. 15 minutes
C. 30 minutes
D. 60 minutes
When a data point ID fails it should be updated every?
A. 5 minutes
B. 15 minutes
C. 30 minutes
D. 60 minutes
How long does pjm have to correct a facility that is operating above the 4 hour emergency
rating?
A. 5 minutes
B. 10 minutes
C. 15 minutes
D. 30 minutes
During system restoration one way to keep frequency above 59.5 Hz is to activate which of the
following?
A. Synchronized reserves
B. Dynamic reserves
C. Secondary reserves
D. Shared reserves
Does PJM operate for double-circuit tower line contingencies?
A. Yes
B. No
C. Only in certain circumstances when conservative operations is declared
D. Always during conservative operations
How many temperature rating sets are there for PJM?
A. 8
B. 10
C. 16
D. 18
If you have an actual thermal violation that is above the normal limit but below the emergency
limit, how long do you have to get it back below the normal limit?
A. 5 minutes
B. 15 minutes
C. 30 minutes
D. 60 minutes
If you have an actual thermal violation above the emergency limit but below the load dump limit,
how long do you have to get it back below the normal limit?
A. 5 minutes
B. 10 minutes
C. 15 minutes
D. 30 minutes
If you have a post contingency thermal violation above the load dump limit how long do you
have?
A. 5 minutes
B. 15 minutes
C. 30 minutes
D. Immediately
PCLLRW's are intended to relieve localized constraints at _________kV and below.
A. 69kv
B. 138kv
C. 230kv
D. 500kv
A capacitor is rated 100 MVARs at 345 kV. If the capacitor is energized at 325 kV, what is the
approximate capacitor output?
A. 75 MVAR
B. 100 MVAR
C. 89 MVAR
D. 97 MVAR
A steam unit is online at 400 MW. Its D-curve data shows that it is capable of providing 150
MVAR of Reactive capability at that power level. It is currently providing 122 MVAR to the
system. What is the unit MVAR reserve for this unit, for Reactive Check (RRC) reporting?
A. 18 MVAR
B. 20 MVAR
C. 22 MVAR
D. 28 MVAR
The Ability of generators to damp out oscillations caused by disturbances oscillations may show
up as real or reactive power flow fluctuations is defined as?
A. Dynamic stability
B. Transient stability
C. Steady state stability
D. Generation Stability
Which of the following actions would be used FIRST to control a reactive transfer limit
Violation?
A. Place reactors in service
B. Load offcost (out of merit) generation
C. Issue load dump warning
D. Modify firm transaction schedules
Which of the following is part of the criteria used to determine if a switching event can be part of
the Constraint Management Mitigation Procedure?
A. Planned event should not last longer than 5 minutes
B. Planned event should not last longer than 10 minutes
C. Planned event should not last longer than 15 minutes
D. Planned event should not exceed load dump limit
According to PJM procedures, who is responsible for coordinating and restoring 500 kV and
above lines during restoration?
A. The PJM System Operator
B. The owner or operator of the facility
C. The owner of the transmission facility
D. The transmission Operator who operates the line
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. 5 minutes
PJM will implement Synchronized Reserve and/or Contingency Reserve if a loss of generation
is equal to or greater than what percentage of the largest or most single severe contingency of
the day?
a. 80%
b. 100%
c. 150%
d. 200%
Which statement is TRUE concerning Surge Impedance Loading?
A. Below SIL, the line acts like an inductive load
B. At SIL, the voltage profile of the line is flat
C. Above SIL, the highest voltage value occurs in the middle of the line
D. SIL is affected by line length
When taking an EHV RTU out of service, what affected data will have to be updated
periodically?
A. After the loss of a radial transmission line
B. Bus voltages for all 230kv and below stations
C. MW line flows for 345kv and higher lines and all tie lines
D. All data every 5-10 minutes