NERC Reliability Certification Practice Questions (Multiple-Choice Exam Prep 2025)

NERC Test Multiple choices Questions & Answer key

voltage at Station A and B will
decrease 3 multiple choice options




(REVIEW DIAGRAM #1)
If CB-5 is closed, which of
the following best describes
the impact on the voltages at
Stations A and B?
A. voltage at Station B will
increase and the voltage at
Station A will decrease
B. voltage at Station A will
increase and the voltage at
Station B will decrease
C. voltage at Station A and B
will increase
D. voltage at Station A and B
will decrease




remove Bus 5 capacitor from
service 3 multiple choice options




(REVIEW DIAGRAM #2)
If a high voltage condition
exists on Bus 5, which of the
following actions would
have the most impact toward
lowering the voltage on Bus
5?
A. reduce MVAR on GEN 3
B. remove Bus 5 capacitor
from service
C. start GEN 4 to absorb
MVAR
D. adjust the taps on the
230/138 transformer

, NERC Test Multiple choices Questions & Answer key
open the reactor bypass CB
3 multiple choice options



(REVIEW DIAGRAM #3)
If Line 3 in the identified
system has a rating of 125
MW and a current flow of
150 MW from Station B to
Station A, what action can be
implemented that would
result in a reduction of the
flow on Line 3?
A. decrease GEN 1 by 50
MW
B. open the reactor bypass
CB
C. reduce load at Load 2
D. disconnect Load 3




Line 4 would be de-energized from
this station 1 multiple choice option

(REVIEW DIAGRAM #4)
Which of the following
would be an impact on the
ring bus and lines?
A. Line 1 would be the only
de-energized line from this
station
B. Line 4 would be de-
energized from this station



the flow on Line 2 would increase
1 multiple choice option

(REVIEW DIAGRAM #5)
Which of the following
statements identifies what
the impacts would be if Line
1 trips out of service?
A. Generator 1 would reduce
its output
B. the flow on Line 2 would
increase

, NERC Test Multiple choices Questions & Answer key
reduce GEN 1 and increase GEN 3
1 multiple choice option


(REVIEW DIAGRAM #6)
If the MW loading on Line 1
is flowing from Bus 1 to Bus
4, which of the following
generation adjustments
would have the greatest
impact in reducing the Line
1 loading?
A. increase GEN 1 and
reduce GEN 3
B. reduce GEN 1 and
increase GEN 3




500 MW
3 multiple choice options




(REVIEW DIAGRAM #7)
Gen 1 is currently putting
out 1,000 MW and Gen 2 is
offline. Based on the
distribution factors, 40% of
the output flows on line 1
and 30% of the output flows
on each Line 2 and Line 3. If
the LODF for the loss of line
1 are .5 for Line 2 and .5 for
line 3, what would the new
flow be on Line 2 or Line 3
if Line 1 trips?
A. 300 MW
B. 400 MW
C. 500 MW
D. 600 MW

, NERC Test Multiple choices Questions & Answer key
31.6 Ω
3 multiple choice options


(REVIEW DIAGRAM #8)
What would the impedance
be for the circuit that has an
AC voltage source and a
resistance of 30 ohms,
inductive reactance of 80
ohms, and a capacitive
reactance of 70 ohms?
A. 11.4 Ω
B. 31.6 Ω
C. 73.2 Ω
D. 152.9 Ω




increasing the MVAR output GEN
2 3 multiple choice options




(REVIEW DIAGRAM #9)
If there was a low voltage
situation in the area of Bus 2,
which of the following
actions would be the first
action to assist in increasing
the voltage?

A. reducing load at LOAD 5
B. reducing MVAR output
on GEN 3
C. reducing load at LOAD 4
D. increasing the MVAR
output GEN 2