KNOWN NERC EXAM QUESTIONS: From Class
KNOWN NERC EXAM QUESTIONS: From Class Questions & Answers
Study online at https://quizlet.com/_i9bl5e
1. A Balancing Authority notices that Operating Reserve b) An inaccurate load fore-
has steadily declined throughout the hour. What is the cast
most likely cause?
a) Loss of a large generator in the area
b) An inaccurate load forecast
c) Loss of a major transmission line
d) A malfunction of EMS
2. Balancing Area A notices that the Interconnection fre- b) A net under-generation
quency is 59.94 Hz and their ACE is 0. Which of the in the Interconnection
following could be the cause of this reading?
a) A net under-generation in Balancing Area A
b) A net under-generation in the Interconnection
c) A loss of load in Balancing Area A
d) A loss of load in the Interconnection
3. What is the penalty for a Balancing Authority violating a) Must carry additional
the Disturbance Control Standard? Contingency Reserve
a) Must carry additional Contingency Reserve
b) Must develop a correction action plan
c) Must re-evaluate and change its Frequency Bias Set-
ting
d) Must increase its Regulating Reserve
4. Your ACE is a large negative value and system frequen- c) Suspend AGC and in-
cy is 59.80 Hz. Your AGC system is pulsing your units vestigate
down. What should you do?
a) Place AGC in flat frequency control
b) Place AGC in flat tie line control
, KNOWN NERC EXAM QUESTIONS: From Class
KNOWN NERC EXAM QUESTIONS: From Class Questions & Answers
Study online at https://quizlet.com/_i9bl5e
c) Suspend AGC and investigate
d) Do nothing as this is normal
5. When two identical generating units are operated in a) Respond less to fre-
parallel on governor control, and on machine has a 5% quency deviations
droop and the other has a 10% droop, the unit with the
greater (10%) governor droop will:
a) Respond less to frequency deviations
b) Respond more to frequency deviations
c) Respond the same to frequency deviations
d) Not adjust for frequency changes
6. On a radial transmission system a generator has a c) 440
capacity of 600 MWs. The Droop characteristic is at 5%
and the generator is currently loaded at 300 MWs. If
frequency suddenly drops to 59.3 Hz, what would be
the total generator output?
a) 350
b) 400
c) 440
d) 600
7. What is the main purpose of the Frequency Bias Set- b) Assist with arresting fre-
ting in the ACE equation? quency deviations
a) Control frequency to 60 Hz for the entire Intercon-
nection
b) Assist with arresting frequency deviations
c) Restore frequency to 60 Hz after a disturbance
d) maintains frequency between 59.95 and 60.05 Hz
KNOWN NERC EXAM QUESTIONS: From Class Questions & Answers
Study online at https://quizlet.com/_i9bl5e
1. A Balancing Authority notices that Operating Reserve b) An inaccurate load fore-
has steadily declined throughout the hour. What is the cast
most likely cause?
a) Loss of a large generator in the area
b) An inaccurate load forecast
c) Loss of a major transmission line
d) A malfunction of EMS
2. Balancing Area A notices that the Interconnection fre- b) A net under-generation
quency is 59.94 Hz and their ACE is 0. Which of the in the Interconnection
following could be the cause of this reading?
a) A net under-generation in Balancing Area A
b) A net under-generation in the Interconnection
c) A loss of load in Balancing Area A
d) A loss of load in the Interconnection
3. What is the penalty for a Balancing Authority violating a) Must carry additional
the Disturbance Control Standard? Contingency Reserve
a) Must carry additional Contingency Reserve
b) Must develop a correction action plan
c) Must re-evaluate and change its Frequency Bias Set-
ting
d) Must increase its Regulating Reserve
4. Your ACE is a large negative value and system frequen- c) Suspend AGC and in-
cy is 59.80 Hz. Your AGC system is pulsing your units vestigate
down. What should you do?
a) Place AGC in flat frequency control
b) Place AGC in flat tie line control
, KNOWN NERC EXAM QUESTIONS: From Class
KNOWN NERC EXAM QUESTIONS: From Class Questions & Answers
Study online at https://quizlet.com/_i9bl5e
c) Suspend AGC and investigate
d) Do nothing as this is normal
5. When two identical generating units are operated in a) Respond less to fre-
parallel on governor control, and on machine has a 5% quency deviations
droop and the other has a 10% droop, the unit with the
greater (10%) governor droop will:
a) Respond less to frequency deviations
b) Respond more to frequency deviations
c) Respond the same to frequency deviations
d) Not adjust for frequency changes
6. On a radial transmission system a generator has a c) 440
capacity of 600 MWs. The Droop characteristic is at 5%
and the generator is currently loaded at 300 MWs. If
frequency suddenly drops to 59.3 Hz, what would be
the total generator output?
a) 350
b) 400
c) 440
d) 600
7. What is the main purpose of the Frequency Bias Set- b) Assist with arresting fre-
ting in the ACE equation? quency deviations
a) Control frequency to 60 Hz for the entire Intercon-
nection
b) Assist with arresting frequency deviations
c) Restore frequency to 60 Hz after a disturbance
d) maintains frequency between 59.95 and 60.05 Hz
