Question 1
At what torque angle of operation does power typically begin to flow from the generator
to the system?
A) 90 degrees
B) 60 degrees
C) 30 degrees
D) 10 degrees
CORRECT ANSWER
10 degrees
Question 2
Choose the answer that best describes the operation of a rotor.
A) The stationary part of the transmission system.
B) A type of superconductor.
C) The stationary element of a generator that has its windings connected to the system.
D) The excited (energized) field winding that rotates inside the stator to induce current into
the stator windings.
CORRECT ANSWER
The excited (energized) field winding that rotates inside the stator to induce current into
the stator windings.
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,Question 3
In a system that is more capacitive than inductive, the current sine wave will ______ the
voltage sine wave with tends to ___________ voltage.
A) lag; raise
B) lead; raise
C) lead; lower
D) lag; lower
CORRECT ANSWER
lead; raise
Question 4
Sustained operation with a power angle or torque angle above ______ can lead to system
instability.
A) 10 degrees
B) 90 degrees
C) 120 degrees
D) 360 degrees
CORRECT ANSWER
90 degrees
Question 5
Which of the following conditions may cause transient instability in the power system?
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,A) When the power angle increases to 90 degrees or more.
B) When a disturbance causes momentary power angle excursions greater than 90 degrees.
C) When heavy power transfers occur in the system, such as when there is a loss in
generation.
D) All of the above
CORRECT ANSWER
All of the above
Question 6
Which of the following is a method that Reliability Coordinators and Balancing Authorities
may use to manage transmission outages?
A) Coordinate and adhere to voltage schedules to minimize reactive power flow.
B) Optimize the use of Load Tap Changer transformers, capacitors, and reactors.
C) Verify voltage control equipment are on automatic to supply the required voltage
support.
D) All of the above
CORRECT ANSWER
All of the above
Question 7
When a large generator on an Interconnection trips off line, the ____________ of the
Interconnection ____________.
A) frequency; drops
B) transformer temperature; drops
C) AVRs; drops
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, D) voltage; increases
CORRECT ANSWER
frequency; drops
Question 8
A(n) ___________ is the value that satisfies the most limiting of the prescribed operating
criteria for a specified system configuration to ensure operation within acceptable
reliability criteria.
A) System Operating Limit
B) Circuit Overload
C) System Overload Limit
D) Interconnection Reliability Operating Limits
CORRECT ANSWER
System Operating Limit
Question 9
Generator ratings specify the __________ and ___________ at which they can operate
safely.
A) temperature; voltage
B) torque angle; voltage
C) System Operating Limits; Interconnection Operating Limits
D) voltage; frequency
CORRECT ANSWER
voltage; frequency
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At what torque angle of operation does power typically begin to flow from the generator
to the system?
A) 90 degrees
B) 60 degrees
C) 30 degrees
D) 10 degrees
CORRECT ANSWER
10 degrees
Question 2
Choose the answer that best describes the operation of a rotor.
A) The stationary part of the transmission system.
B) A type of superconductor.
C) The stationary element of a generator that has its windings connected to the system.
D) The excited (energized) field winding that rotates inside the stator to induce current into
the stator windings.
CORRECT ANSWER
The excited (energized) field winding that rotates inside the stator to induce current into
the stator windings.
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,Question 3
In a system that is more capacitive than inductive, the current sine wave will ______ the
voltage sine wave with tends to ___________ voltage.
A) lag; raise
B) lead; raise
C) lead; lower
D) lag; lower
CORRECT ANSWER
lead; raise
Question 4
Sustained operation with a power angle or torque angle above ______ can lead to system
instability.
A) 10 degrees
B) 90 degrees
C) 120 degrees
D) 360 degrees
CORRECT ANSWER
90 degrees
Question 5
Which of the following conditions may cause transient instability in the power system?
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,A) When the power angle increases to 90 degrees or more.
B) When a disturbance causes momentary power angle excursions greater than 90 degrees.
C) When heavy power transfers occur in the system, such as when there is a loss in
generation.
D) All of the above
CORRECT ANSWER
All of the above
Question 6
Which of the following is a method that Reliability Coordinators and Balancing Authorities
may use to manage transmission outages?
A) Coordinate and adhere to voltage schedules to minimize reactive power flow.
B) Optimize the use of Load Tap Changer transformers, capacitors, and reactors.
C) Verify voltage control equipment are on automatic to supply the required voltage
support.
D) All of the above
CORRECT ANSWER
All of the above
Question 7
When a large generator on an Interconnection trips off line, the ____________ of the
Interconnection ____________.
A) frequency; drops
B) transformer temperature; drops
C) AVRs; drops
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, D) voltage; increases
CORRECT ANSWER
frequency; drops
Question 8
A(n) ___________ is the value that satisfies the most limiting of the prescribed operating
criteria for a specified system configuration to ensure operation within acceptable
reliability criteria.
A) System Operating Limit
B) Circuit Overload
C) System Overload Limit
D) Interconnection Reliability Operating Limits
CORRECT ANSWER
System Operating Limit
Question 9
Generator ratings specify the __________ and ___________ at which they can operate
safely.
A) temperature; voltage
B) torque angle; voltage
C) System Operating Limits; Interconnection Operating Limits
D) voltage; frequency
CORRECT ANSWER
voltage; frequency
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