NERC Transmission Practice Test
A transmission line between Bus A and Bus B has MW flow from Bus B to Bus A. After
the tripping of a parallel line, the line flow from Bus B to Bus A exceeds the lines thermal
rating. Which of the following actions would assist the operator in correcting the
problem? - ANS Increase generation at Bus A
\If a Balancing Authority is unable to calculate ACE for more than _________ minutes it
shall notify its Reliability Coordinator. - ANS 30
\If your system has lost a large amount of customer load due to a system disturbance,
but has remained connected to all of your neighbors, what is the best solution to
consider? - ANS Coordinate with the neighbors
\The coordination of voltage schedules by system operators would be utilized to reduce
all of the following EXCEPT - ANS Reactive inadvertent
\Underfrequency load shedding is set-up so that which of the following does NOT occur?
- ANS Uncontrolled separation
\What is a major concern for a System Operator during emergency conditions? - ANS
System remains connected to the Interconnection
\What should a system operator expect to see if the generator increases its excitation? -
ANS An increase in MVAR output
\Which type of relay operates on the premise of comparing the flow in and out of the area
of protection? - ANS Differential relay
\Who is responsible to make sure that the operation of voltage control equipment is
coordinated with other impacted entities? - ANS Transmission Operator
\You report for work on a peak summer day with expected high temperatures and load.
What can you do to maintain an adequate system voltage profile? - ANS Get under the
voltage by placing capacitors in service while maintaining operating limits
\Your system configuration presents you with a situation of having two parallel lines
between two stations. The lines have different ratings. Line A has a rating of 250 MVA,
while line B has a rating of 200 MVA. Based on the line ratings, what is the first
contingency transfer capability between the two stations? - ANS 200 MVA
\
A transmission line between Bus A and Bus B has MW flow from Bus B to Bus A. After
the tripping of a parallel line, the line flow from Bus B to Bus A exceeds the lines thermal
rating. Which of the following actions would assist the operator in correcting the
problem? - ANS Increase generation at Bus A
\If a Balancing Authority is unable to calculate ACE for more than _________ minutes it
shall notify its Reliability Coordinator. - ANS 30
\If your system has lost a large amount of customer load due to a system disturbance,
but has remained connected to all of your neighbors, what is the best solution to
consider? - ANS Coordinate with the neighbors
\The coordination of voltage schedules by system operators would be utilized to reduce
all of the following EXCEPT - ANS Reactive inadvertent
\Underfrequency load shedding is set-up so that which of the following does NOT occur?
- ANS Uncontrolled separation
\What is a major concern for a System Operator during emergency conditions? - ANS
System remains connected to the Interconnection
\What should a system operator expect to see if the generator increases its excitation? -
ANS An increase in MVAR output
\Which type of relay operates on the premise of comparing the flow in and out of the area
of protection? - ANS Differential relay
\Who is responsible to make sure that the operation of voltage control equipment is
coordinated with other impacted entities? - ANS Transmission Operator
\You report for work on a peak summer day with expected high temperatures and load.
What can you do to maintain an adequate system voltage profile? - ANS Get under the
voltage by placing capacitors in service while maintaining operating limits
\Your system configuration presents you with a situation of having two parallel lines
between two stations. The lines have different ratings. Line A has a rating of 250 MVA,
while line B has a rating of 200 MVA. Based on the line ratings, what is the first
contingency transfer capability between the two stations? - ANS 200 MVA
\
