PJM cert: TO final Correct 100%
Which of the following would not be an action to take for low voltages
A. Increase generator MW output
B. Remove reactors from the system
C. Increase generator MVAR output
D. Place capacitors in service - ANSWER A. Increase generator MW output
PJM operates it's 500 KV system so that no post contingency voltage drop will exceed
what minimum value
A. 1%
B. 3%
C. 5%
D. 7% - ANSWER C. 5%
The PJM system operator finds that a 230 KV transmission line is over its normal limit.
How long does the operator have to return the line to within its normal limit
A. Immediately
B. 5 minutes
C. 15 minutes
D. 30 minutes - ANSWER C. 15 minutes
What action can an operator take to increase its system dynamic reactive reserve
A. Increase a generator MW output
B. Remove a capacitor from service
C. Place a capacitor in service
D. Take a generator off-line - ANSWER C. Place a capacitor in service
The first step that an operator should take following a system separation should be
A. Clear all buses
B. Assess the system
C. Place all QuickStart units in service
D. Notify NERC - ANSWER B. Assess the system
PJM transmission owners are required to provide PJM with four sets of thermal limits for
all facilities monitored by PJM. Which of the following is not one of the four
A. Actual
B. Normal
C. Emergency
D. Load dump - ANSWER A. Actual
If a transmission facility is found to be loaded above it's short term emergency limit, how
long does the operator have to correct the problem
A. 5 minutes
B. 10 minutes
,C. 15 minutes
D. 30 minutes - ANSWER C. 15 minutes
If a shunt reactor is placed in service the expected result would be
A. An increase in voltage
B. A decrease in voltage
C. An increase in synchronous reserves
D. A decrease in synchronous reserves - ANSWER B. A decrease in voltage
What would be the expected results from the tripping of 1000 MW generator outside of
the PJM RTO, but within the eastern interconnection
A. Frequency would drop, but the PJM ACE would remain unchanged
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 and the PJM ACE would indicate 1000 MW under generation
- ANSWER A. Frequency would drop, but the PJM ACE would remain unchanged
When a discrepancy occurs between PJMs thermal rating and a transmission owners
thermal rating which of the following is always used
A. PJM's rating
B. Transmission owners rating
C. The most conservative rating
D. The average of the two ratings - ANSWER C. The most conservative rating
If PJM operates to a 5% voltage drop limit on the 500 KV system which of the following
would be considered a violation
A. Pre-530 KV, post - 515 KV
B. Pre-545 KV, post - 520 KV
C. Pre-535 KV, post- 512 KV
D. Pre-536 KV, post - 507 KV - ANSWER D. Pre-536 KV, post - 507 KV
According to the PJM transmission operation manual, if a 500 KV line trips out of
service and does not re-close in the PJM Mid-Atlantic region the transmission operator
should
A. Leave it out of service and submit outage via eDART
B. Manually re-close within five minutes
C. Reclose after 30 minutes
D. Restart EMS - ANSWER B. Manually re-close within five minutes
The PJM system has phase angle regulators between the New York ISO and PJM
systems. The phase angle regulators are there to help?
A. Maintain system VAR flow
B. Increase overall system voltages
C. Control MW flows
D. Reduce overall market price - ANSWER C. Control MW flows
, When would PJM issue a low voltage alert
A. When loads are heavy and bulk power voltage levels are expected to be low
B. When Virginia power and NY- ISO is experiencing high loads
C. When a PJM member system is experiencing a new system peak load
D. When PJM has projected that they will experience problems in meeting their CPS
criteria - ANSWER A. When loads are heavy and bulk power voltage levels are
expected to be low
PJM operates with different temperature adjusted ratings during the day and night
periods. If the weather forecast indicates that the day period Temperature will be 48°
what temperature setting should be utilized
A. 41° day
B. 41° night
C. 50° day
D. 50° night - ANSWER C. 50° day
Which temperature range makes up the PJM ambient temperature sets
A. 10° to 95°F
B. 10° to 99°F
C. 32° to 105°F
D. 32° to 95°F - ANSWER D. 32° to 95°F
Which of the following actions would most likely result in a reduction of a generators
MVAR output
A. Placing a nearby reactor in service
B. Increase the generator MW output
C. Placing a nearby shunt capacitor in service
D. Removing a nearby capacitor from service - ANSWER C. Placing a nearby shunt
capacitor in service
If your system configuration was such that you had three parallel lines of the same
construction, length, and impedance with a normal rating of 160 MVA. Each of the lines
currently has a loading of 120 MVA on each line. If one of the three lines were to trip out
of service what would be the expected flow on the remaining two lines
A. 120
B. 160
C. 180
D. 240 - ANSWER C. 180
If your system configuration is such that you had three parallel lines of the same
construction, length, and impedance with a normal rating of 155 MVA and an
emergency rating of 170 MVA each of the lines has a loading of 130 MVA if one of the
lines were to trip out of service what limits if any would be exceeded
A. Normal and emergency
B. Normal only
C. Neither due to the surge impedance loading of the line
Which of the following would not be an action to take for low voltages
A. Increase generator MW output
B. Remove reactors from the system
C. Increase generator MVAR output
D. Place capacitors in service - ANSWER A. Increase generator MW output
PJM operates it's 500 KV system so that no post contingency voltage drop will exceed
what minimum value
A. 1%
B. 3%
C. 5%
D. 7% - ANSWER C. 5%
The PJM system operator finds that a 230 KV transmission line is over its normal limit.
How long does the operator have to return the line to within its normal limit
A. Immediately
B. 5 minutes
C. 15 minutes
D. 30 minutes - ANSWER C. 15 minutes
What action can an operator take to increase its system dynamic reactive reserve
A. Increase a generator MW output
B. Remove a capacitor from service
C. Place a capacitor in service
D. Take a generator off-line - ANSWER C. Place a capacitor in service
The first step that an operator should take following a system separation should be
A. Clear all buses
B. Assess the system
C. Place all QuickStart units in service
D. Notify NERC - ANSWER B. Assess the system
PJM transmission owners are required to provide PJM with four sets of thermal limits for
all facilities monitored by PJM. Which of the following is not one of the four
A. Actual
B. Normal
C. Emergency
D. Load dump - ANSWER A. Actual
If a transmission facility is found to be loaded above it's short term emergency limit, how
long does the operator have to correct the problem
A. 5 minutes
B. 10 minutes
,C. 15 minutes
D. 30 minutes - ANSWER C. 15 minutes
If a shunt reactor is placed in service the expected result would be
A. An increase in voltage
B. A decrease in voltage
C. An increase in synchronous reserves
D. A decrease in synchronous reserves - ANSWER B. A decrease in voltage
What would be the expected results from the tripping of 1000 MW generator outside of
the PJM RTO, but within the eastern interconnection
A. Frequency would drop, but the PJM ACE would remain unchanged
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 and the PJM ACE would indicate 1000 MW under generation
- ANSWER A. Frequency would drop, but the PJM ACE would remain unchanged
When a discrepancy occurs between PJMs thermal rating and a transmission owners
thermal rating which of the following is always used
A. PJM's rating
B. Transmission owners rating
C. The most conservative rating
D. The average of the two ratings - ANSWER C. The most conservative rating
If PJM operates to a 5% voltage drop limit on the 500 KV system which of the following
would be considered a violation
A. Pre-530 KV, post - 515 KV
B. Pre-545 KV, post - 520 KV
C. Pre-535 KV, post- 512 KV
D. Pre-536 KV, post - 507 KV - ANSWER D. Pre-536 KV, post - 507 KV
According to the PJM transmission operation manual, if a 500 KV line trips out of
service and does not re-close in the PJM Mid-Atlantic region the transmission operator
should
A. Leave it out of service and submit outage via eDART
B. Manually re-close within five minutes
C. Reclose after 30 minutes
D. Restart EMS - ANSWER B. Manually re-close within five minutes
The PJM system has phase angle regulators between the New York ISO and PJM
systems. The phase angle regulators are there to help?
A. Maintain system VAR flow
B. Increase overall system voltages
C. Control MW flows
D. Reduce overall market price - ANSWER C. Control MW flows
, When would PJM issue a low voltage alert
A. When loads are heavy and bulk power voltage levels are expected to be low
B. When Virginia power and NY- ISO is experiencing high loads
C. When a PJM member system is experiencing a new system peak load
D. When PJM has projected that they will experience problems in meeting their CPS
criteria - ANSWER A. When loads are heavy and bulk power voltage levels are
expected to be low
PJM operates with different temperature adjusted ratings during the day and night
periods. If the weather forecast indicates that the day period Temperature will be 48°
what temperature setting should be utilized
A. 41° day
B. 41° night
C. 50° day
D. 50° night - ANSWER C. 50° day
Which temperature range makes up the PJM ambient temperature sets
A. 10° to 95°F
B. 10° to 99°F
C. 32° to 105°F
D. 32° to 95°F - ANSWER D. 32° to 95°F
Which of the following actions would most likely result in a reduction of a generators
MVAR output
A. Placing a nearby reactor in service
B. Increase the generator MW output
C. Placing a nearby shunt capacitor in service
D. Removing a nearby capacitor from service - ANSWER C. Placing a nearby shunt
capacitor in service
If your system configuration was such that you had three parallel lines of the same
construction, length, and impedance with a normal rating of 160 MVA. Each of the lines
currently has a loading of 120 MVA on each line. If one of the three lines were to trip out
of service what would be the expected flow on the remaining two lines
A. 120
B. 160
C. 180
D. 240 - ANSWER C. 180
If your system configuration is such that you had three parallel lines of the same
construction, length, and impedance with a normal rating of 155 MVA and an
emergency rating of 170 MVA each of the lines has a loading of 130 MVA if one of the
lines were to trip out of service what limits if any would be exceeded
A. Normal and emergency
B. Normal only
C. Neither due to the surge impedance loading of the line
