Page 1 of 95
NERC Certification Exam ALL 350 QUESTIONS
AND VERIFIED SOLUTIONS LATEST UPDATE
THIS YEAR
1. A BA has a sudden change in demand-supply balance due to a sudden loss of load or
generation in their area. The sudden change will be seen instantaneously in which calculated
value?
a. Frequency
b. system lambda
c. operating reserves
d. ACE
d. ACE
2. A BA has an average ACE of -75MW during one clock ten-minute period. There L10 is
50MW. Which NERC Control Performance Standard has been violated?
a. CPS1
b. CPS2
c. DCS
d. SOL
b. CPS2
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3. The ACE equation must include metered data: dynamic schedules, pseudo ties, actual
frequency, and all ___________.
a. Generation
b. Transformers
c. Tie lines
d. Communications
c. Tie Lines
4. An external generator tripped that was large enough to reduce the frequency from 60.00
Hz to 59.94 Hz. Your BA's Frequency Bias is 200 MW/0.1 Hz. How many MW would your
system initially contribute to frequency support?
a. 80 MW
b. 100 MW
c. 200 MW
d. 120 MW
d. 120 MW
5. BA-A is currently reading a system freq of 59.95 Hz. Its Net Actual Interchange is +100 MW
and its Net Scheduled Interchange is +120 MW. If BA-A's freq bias setting is -100 Mw, BA-A's
AGC is pulsing its generators to _____________.
a. Remain at current MW output level
b. Increase MW output
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c. Decrease MW output
d. Increase excitation on the field windings
b. Increase MW output
6. Which control system on the generators would respond to a drop in system freq resulting
from the loss of generation?
a. Generator governor control system
b. Differential relay systems
c. Special protection systems
d. Automatic Voltage Regulators
a. Generator governor control system
7. Load increases or decreases in relation to the increase or decrease in frequency. It has been
determined that for every 1% change in freq, load will change approx ______% iin the same
direction in an Interconnected system.
a. 1
b. 2
c. 5
d. 3
b. 2 (3 if it is pure motor load)
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8. A BA has several units on governor control. The units have different capacities that range
from 200 MW to 1000 MW and droop settings from 2% to 5%. The biggest adjustments in
MW output in response to a freq disturbance will be provided by units that have __________.
a. large capacity; large droop setting
b. large capacity; small droop setting
c. small capacity; large droop setting
d. small capacity; small droop setting
b. large capacity; small droop setting
9. A BA that is operating asynchronously (separated from the interconnection) should switch
its AGC to which mode?
a. tie line bias control
b flat tie line control
c. flat frequency control
d. manual control
c. flat frequency control
10. If the BA selling power to an end user enters the wrong schedule for the upcoming hour,
which part of the ACE equatio [ACE = (NIA - NIS) - 10B(FA - FS) - IME], will cause Inadvertent
Interchange to occur as the result of the incorrect shedule?
a. Both the Interchange and freq portions will contribute (NIA - NIS) - 10B(FA - FS)
b. Only the interchange portion (NIA - NIS) will contribute
4
NERC Certification Exam ALL 350 QUESTIONS
AND VERIFIED SOLUTIONS LATEST UPDATE
THIS YEAR
1. A BA has a sudden change in demand-supply balance due to a sudden loss of load or
generation in their area. The sudden change will be seen instantaneously in which calculated
value?
a. Frequency
b. system lambda
c. operating reserves
d. ACE
d. ACE
2. A BA has an average ACE of -75MW during one clock ten-minute period. There L10 is
50MW. Which NERC Control Performance Standard has been violated?
a. CPS1
b. CPS2
c. DCS
d. SOL
b. CPS2
1
, Page 2 of 95
3. The ACE equation must include metered data: dynamic schedules, pseudo ties, actual
frequency, and all ___________.
a. Generation
b. Transformers
c. Tie lines
d. Communications
c. Tie Lines
4. An external generator tripped that was large enough to reduce the frequency from 60.00
Hz to 59.94 Hz. Your BA's Frequency Bias is 200 MW/0.1 Hz. How many MW would your
system initially contribute to frequency support?
a. 80 MW
b. 100 MW
c. 200 MW
d. 120 MW
d. 120 MW
5. BA-A is currently reading a system freq of 59.95 Hz. Its Net Actual Interchange is +100 MW
and its Net Scheduled Interchange is +120 MW. If BA-A's freq bias setting is -100 Mw, BA-A's
AGC is pulsing its generators to _____________.
a. Remain at current MW output level
b. Increase MW output
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c. Decrease MW output
d. Increase excitation on the field windings
b. Increase MW output
6. Which control system on the generators would respond to a drop in system freq resulting
from the loss of generation?
a. Generator governor control system
b. Differential relay systems
c. Special protection systems
d. Automatic Voltage Regulators
a. Generator governor control system
7. Load increases or decreases in relation to the increase or decrease in frequency. It has been
determined that for every 1% change in freq, load will change approx ______% iin the same
direction in an Interconnected system.
a. 1
b. 2
c. 5
d. 3
b. 2 (3 if it is pure motor load)
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8. A BA has several units on governor control. The units have different capacities that range
from 200 MW to 1000 MW and droop settings from 2% to 5%. The biggest adjustments in
MW output in response to a freq disturbance will be provided by units that have __________.
a. large capacity; large droop setting
b. large capacity; small droop setting
c. small capacity; large droop setting
d. small capacity; small droop setting
b. large capacity; small droop setting
9. A BA that is operating asynchronously (separated from the interconnection) should switch
its AGC to which mode?
a. tie line bias control
b flat tie line control
c. flat frequency control
d. manual control
c. flat frequency control
10. If the BA selling power to an end user enters the wrong schedule for the upcoming hour,
which part of the ACE equatio [ACE = (NIA - NIS) - 10B(FA - FS) - IME], will cause Inadvertent
Interchange to occur as the result of the incorrect shedule?
a. Both the Interchange and freq portions will contribute (NIA - NIS) - 10B(FA - FS)
b. Only the interchange portion (NIA - NIS) will contribute
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