NERC Transmission Practice Test
Questions and Correct Answers
Which type of relay operates on the premise of comparing the flow in and out of the area of protection?
- Correct Answer: Differential relay
Underfrequency load shedding is set-up so that which of the following does NOT occur? - Correct
Answer: Uncontrolled separation
Who is responsible to make sure that the operation of voltage control equipment is coordinated with
other impacted entities? - Correct Answer: Transmission Operator
The coordination of voltage schedules by system operators would be utilized to reduce all of the
following EXCEPT - Correct Answer: Reactive inadvertent
What should a system operator expect to see if the generator increases its excitation? - Correct Answer:
An increase in MVAR output
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? - Correct Answer: Increase generation at
Bus A
What is a major concern for a System Operator during emergency conditions? - Correct Answer: System
remains connected to the Interconnection
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? - Correct Answer: Coordinate
with the neighbors
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? - Correct Answer: Get under the voltage by placing
capacitors in service while maintaining operating limits
