The a+ advanTage: ace 2026/2027
neRc ceRTificaTion examinaTion
wiTh This sTudy guide
compRehensive q & a
◉ Balancing Authority A has tie - line meter fail to zero on a line that
is exporting 200 MWs . Which of the following statements is true ?
a . The Balancing Authority's total demand indication will increase b
. The Balancing Authority's generators on AGC will decrease
output
c . The Balancing Authority's frequency will decrease d . The
Balancing Authority's ACE reading will increase. Answer: a . The
Balancing Authority's total demand indication will increase
◉ How does a System Operator realize the power system is getting
close to the end of its available reactive resources ?
a. The voltage is increasing
b. The rate of decrease / increase of the voltage does not relate to
change in the load
c. The rate of increase of the voltage decreases with the load
,d . The rate of decrease of the voltage increases with the load.
Answer: d . The rate of decrease of the voltage increases with the
load
◉ Which of the following indications would result from a significant
loss of generation on an external BA ?
a. your ACE goes up and frequency stays the same
b. your ACE stays the same and frequency increases
c. your ACE stays the same and frequency decreases
d. your ACE goes down and frequency drops. Answer: c. your ACE
stays the same and frequency decreases
◉ You have restored a line to service after an outage . After shows no
current flow . What is your next action ? closing the line , one of the
phases
a. Have the on - site crew open the line
b. Notify your RC
c. Call the crew that restored the line to check reading on each phase
d . Report RTU problem. Answer: c. Call the crew that restored the
line to check reading on each phase
◉ Which of the following would classify as an Operating Instruction
,?
a. Requesting generator status from a Generator Operator
b. Discussing Operating Plan with an Adjacent Transmission
Operator
c. Directing a Generator Operator to maintain current MVAR output
of a generator
d. Requesting outage information from a Distribution Provider.
Answer: c. Directing a Generator Operator to maintain current
MVAR output of a generator
◉ After the winter morning peak , you have CTs base loaded unable
to decrease output and other units unable to regulate any lower .
Nuclear units are loaded and your solar is starting to pick up . ACE is
trending up and you have no regulation . What would you do ?
a . Take your CTs off-line b .
Increase Interchange out c .
Curtail solar power production
d . Consider available spinning reserve and replace resources
planned for the day. Answer: a . Take your CTs off-line
◉ How can you more effectively increase the MW transfer rate
through a transmission line ?
, a. Decrease Voltage on the sending end
b. Change taps on the Phase Shifting Transformer (PST)
c. Increase load on the receiving end
d. Install series reactor in the line. Answer: b. Change taps on the
Phase Shifting Transformer (PST)
◉ Generators will trip on an under - frequency condition of
approximately 57.5 Hz . What is the purpose of generator
underfrequency trips?
a. To protect the turbine from damage
b. To protect the generator windings from overheating
c. To rebalance generation and load and arrest the frequency drop
d. To prevent islanding conditions. Answer: a. To protect the turbine
from damage
◉ What is the expected inrush of cold load ?
a . less than 5 times the MVA b
. up to 10 times the MVA
c . up to 20 times the MVA
d . no changes in MVA. Answer: b . up to 10 times the MVA
neRc ceRTificaTion examinaTion
wiTh This sTudy guide
compRehensive q & a
◉ Balancing Authority A has tie - line meter fail to zero on a line that
is exporting 200 MWs . Which of the following statements is true ?
a . The Balancing Authority's total demand indication will increase b
. The Balancing Authority's generators on AGC will decrease
output
c . The Balancing Authority's frequency will decrease d . The
Balancing Authority's ACE reading will increase. Answer: a . The
Balancing Authority's total demand indication will increase
◉ How does a System Operator realize the power system is getting
close to the end of its available reactive resources ?
a. The voltage is increasing
b. The rate of decrease / increase of the voltage does not relate to
change in the load
c. The rate of increase of the voltage decreases with the load
,d . The rate of decrease of the voltage increases with the load.
Answer: d . The rate of decrease of the voltage increases with the
load
◉ Which of the following indications would result from a significant
loss of generation on an external BA ?
a. your ACE goes up and frequency stays the same
b. your ACE stays the same and frequency increases
c. your ACE stays the same and frequency decreases
d. your ACE goes down and frequency drops. Answer: c. your ACE
stays the same and frequency decreases
◉ You have restored a line to service after an outage . After shows no
current flow . What is your next action ? closing the line , one of the
phases
a. Have the on - site crew open the line
b. Notify your RC
c. Call the crew that restored the line to check reading on each phase
d . Report RTU problem. Answer: c. Call the crew that restored the
line to check reading on each phase
◉ Which of the following would classify as an Operating Instruction
,?
a. Requesting generator status from a Generator Operator
b. Discussing Operating Plan with an Adjacent Transmission
Operator
c. Directing a Generator Operator to maintain current MVAR output
of a generator
d. Requesting outage information from a Distribution Provider.
Answer: c. Directing a Generator Operator to maintain current
MVAR output of a generator
◉ After the winter morning peak , you have CTs base loaded unable
to decrease output and other units unable to regulate any lower .
Nuclear units are loaded and your solar is starting to pick up . ACE is
trending up and you have no regulation . What would you do ?
a . Take your CTs off-line b .
Increase Interchange out c .
Curtail solar power production
d . Consider available spinning reserve and replace resources
planned for the day. Answer: a . Take your CTs off-line
◉ How can you more effectively increase the MW transfer rate
through a transmission line ?
, a. Decrease Voltage on the sending end
b. Change taps on the Phase Shifting Transformer (PST)
c. Increase load on the receiving end
d. Install series reactor in the line. Answer: b. Change taps on the
Phase Shifting Transformer (PST)
◉ Generators will trip on an under - frequency condition of
approximately 57.5 Hz . What is the purpose of generator
underfrequency trips?
a. To protect the turbine from damage
b. To protect the generator windings from overheating
c. To rebalance generation and load and arrest the frequency drop
d. To prevent islanding conditions. Answer: a. To protect the turbine
from damage
◉ What is the expected inrush of cold load ?
a . less than 5 times the MVA b
. up to 10 times the MVA
c . up to 20 times the MVA
d . no changes in MVA. Answer: b . up to 10 times the MVA
