SOS NERC PREP-RELIABILITY EXAM LATEST 2024
QUESTIONS AND CORRECT DETAILED (VERIFIED
ANSWERS)|ALREADY GRADED A+
The Reliability Coordinator just informed you of a slow time
error correction which will begin at the top of the next hour.
Your EMS system will not let you change your scheduled
frequency. Your Frequency Bias Setting is -100 MW/.1Hz.
What action should you take?
A) Increase Net Interchange Schedule by 20 MWs.
B) Inform the Reliability Coordinator that you cannot
participate in the time error correction.
C) Decrease Net Interchange Schedule by 20 MWs.
D) Increase Net Interchange Schedule by 10 MWs. - ANSWER-
A) Increase Net Interchange Schedule by 20 MWs.
,A Balancing Authority has a sudden loss of a large block of
load in its area. This loss will be seen instantaneously in the
change of which of the following values?
1. Actual Net Interchange
2. Scheduled Frequency
3. Scheduled Net Interchange
4. Area Control Error
A) 4 only
B) 1 & 3
C) 1 & 4
D) 3 & 4 - ANSWER-C) 1 & 4
Metered Data included in the calculation of ACE are: dynamic
schedules, pseudo ties, actual frequency, and all __________.
A) Tie lines readings
B) Generators output
C) Scheduled frequency indications
D) Transformer load - ANSWER-A) Tie lines readings
,Balancing Authority A is currently reading a system frequency
of 60.00 Hz. Its Net Actual Interchange is +100 MW and its
Net Scheduled Interchange is +200 MW. If Balancing
Authority A's frequency bias setting is 100 MW/0.1 Hz, what
is ACE?
A) -100
B) 0
C) 10
D) 100 - ANSWER-A) -100
A Balancing Authority has a Net Interchange Schedule of -250
MWs from 1200 to 1600 on a summer day. The Net
Interchange Actual for those same hours respectively were -
230 MW, -275 MW, -250 MW and -270 MW. What was the
Balancing Authority's Inadvertent Interchange for the 4-hour
period?
A) 6 MWs out
B) 25 MWs in
C) 25 MWs out
D) 6 MWs in - ANSWER-B) 25 MWs in
, For the ACE equation to work properly, dynamic schedules,
pseudo ties, frequency, and all ________________ must be
metered.
A) Generation
B) Communications
C) Transformers
D) Tie lines - ANSWER-D) Tie lines
If the frequency bias setting is set to a less negative value
than the frequency response of a Balancing Authority and a
frequency increase is caused by a sudden loss of load in an
external balancing area, what will be the result?
A) The ACE will be zero and will take no AGC action
B) The ACE will be a negative value and AGC will increase
generation
C) The ACE will be a positive value and AGC will lower
generation
D)This will not affect the ACE - ANSWER-B) The ACE will be a
negative value and AGC will increase generation
QUESTIONS AND CORRECT DETAILED (VERIFIED
ANSWERS)|ALREADY GRADED A+
The Reliability Coordinator just informed you of a slow time
error correction which will begin at the top of the next hour.
Your EMS system will not let you change your scheduled
frequency. Your Frequency Bias Setting is -100 MW/.1Hz.
What action should you take?
A) Increase Net Interchange Schedule by 20 MWs.
B) Inform the Reliability Coordinator that you cannot
participate in the time error correction.
C) Decrease Net Interchange Schedule by 20 MWs.
D) Increase Net Interchange Schedule by 10 MWs. - ANSWER-
A) Increase Net Interchange Schedule by 20 MWs.
,A Balancing Authority has a sudden loss of a large block of
load in its area. This loss will be seen instantaneously in the
change of which of the following values?
1. Actual Net Interchange
2. Scheduled Frequency
3. Scheduled Net Interchange
4. Area Control Error
A) 4 only
B) 1 & 3
C) 1 & 4
D) 3 & 4 - ANSWER-C) 1 & 4
Metered Data included in the calculation of ACE are: dynamic
schedules, pseudo ties, actual frequency, and all __________.
A) Tie lines readings
B) Generators output
C) Scheduled frequency indications
D) Transformer load - ANSWER-A) Tie lines readings
,Balancing Authority A is currently reading a system frequency
of 60.00 Hz. Its Net Actual Interchange is +100 MW and its
Net Scheduled Interchange is +200 MW. If Balancing
Authority A's frequency bias setting is 100 MW/0.1 Hz, what
is ACE?
A) -100
B) 0
C) 10
D) 100 - ANSWER-A) -100
A Balancing Authority has a Net Interchange Schedule of -250
MWs from 1200 to 1600 on a summer day. The Net
Interchange Actual for those same hours respectively were -
230 MW, -275 MW, -250 MW and -270 MW. What was the
Balancing Authority's Inadvertent Interchange for the 4-hour
period?
A) 6 MWs out
B) 25 MWs in
C) 25 MWs out
D) 6 MWs in - ANSWER-B) 25 MWs in
, For the ACE equation to work properly, dynamic schedules,
pseudo ties, frequency, and all ________________ must be
metered.
A) Generation
B) Communications
C) Transformers
D) Tie lines - ANSWER-D) Tie lines
If the frequency bias setting is set to a less negative value
than the frequency response of a Balancing Authority and a
frequency increase is caused by a sudden loss of load in an
external balancing area, what will be the result?
A) The ACE will be zero and will take no AGC action
B) The ACE will be a negative value and AGC will increase
generation
C) The ACE will be a positive value and AGC will lower
generation
D)This will not affect the ACE - ANSWER-B) The ACE will be a
negative value and AGC will increase generation
