NERC CNP PRACTICE TEST Questions
and Answers A+ Latest 2025
The transmission owner and distribution provider that owns
a UVLS system shall have equipment maintenance and
testing programs in place. This program shall include which
of the following?
1. Relays
2 instrument transformers
3 grounds
4 batteries
A. 2,3,&4
B. 1,3,&4
C. 1,2,&3
D. 1,2,&4
D. 1,2,&4
Transmission operator A has a step up transformer that has
a rating of 1000 MVA at a generating facility. The unit is
operating at full load and it is a peak day. Transmission
operator A gets an alarm from a step up transformer and
sees that it is loaded to 105% of its rated capacity.
Transmission operator A has how long to return the
transformer to the rated capacity?
A. 30 minutes
B. 20 minutes
C. 60 minutes
D. 15 minutes
A. 30 minutes
Who is responsible to know the status of all transmission
reactive power resources, including the status of voltage
regulators and power system stabilizers?
A. Transmission owner
B. Transmission operator
,C. Transmission service provider
D. Reliability authority
B. Transmission operator
What is the IEEE number for a differential relay?
A. 25
B. 50
C. 21
D. 87
D. 87
Who is responsible to initiate the confirmation process for
interchange schedules?
A Balancing Authority
B. Generation providing entity
C. Transmission service provider
D. Purchasing selling entity
A. Balancing authority
A 10% reduction in voltage results in the effective value of a
capacitor being
A. Reduced by more than 10%
B. Increased by 10%
C. Reduced 10%
D. Unchanged
A. Reduced by more than 10%
Generator #2 is putting out 100 MW to station A. There is 0
MW coming from system Z to station A. The MW flow on the
lines is as follows: line one has 50 MW from A to B, line 2 has
25 MW from A to B, and line 3 has 25 MW from A to B. If 100
MW were to flow in from system Z, what would be the new
MW flow on line 2
A. 50
B. 100
C. 25
D. 150
A. 50
,If the reliability coordinator identifies an IROL for a future
operating day due to scheduled outages, they are required to
do which of the following?
A. Develop a mitigation plan
B. Declare an EEA3 for the hours of concern
C. Cancel all outages for the operating day
D. Review its restoration plan
A. Develop a mitigation plan
Who can declare an energy emergency?
A. The deficient balancing authorities reliability coordinator
B. The deficient balancing authorities transmission operator
C. The deficient balancing authority
D. The deficient balancing authorities AGC operator
A. The deficient balancing authorities reliability coordinator
A transmission line between Bus A and Bus B has MW flow
from bus B to Bus A. The tripping of a parallel line has
caused the line from bus A to bus B to exceed its thermal
rating. which of the following actions would assist the
operator in correcting the problem.
A. Shed load at bus B
B. Decrease generation at bus A
C. Shed load at bus A
D. Increase generation at bus B
C. Shed load at bus A
If a dynamic transfer value is being used for a pseudo-tie,
what term is used when referring to the balancing authority
where the generator is physically located?
A. Sending BA
B. Receiving BA
C. Attaining BA
D. Native BA
D. Native BA
Each transmission operator and balancing authority shall
verify the restoration procedure by _____
A. Actual testing or simulation
, B. Planning and simulation
C. Planning and testing
D. Dispatcher input or testing
A. Actual testing or simulation
You are a balancing authority and get a call from your
purchase selling entity that an interchange transaction is to
start at the top of the hour and is sinking on your system.
There is no tag in place for this transaction but they are
adamant that it is supposed to start in five minutes. What do
you do?
A. Call the reliability coordinator
B. Notify them you have no tag therefore, no schedule will be
entered into the EMS
C. Enter the said transaction into your EMS/AGC system
D. Notify your shift Manager
B. Notify them you have no tag therefore, no schedule will be
entered into the EMS
Your system has experienced a total shut down. You have
worked your system restoration plan and with the help of the
RC you now seem to be ready to tie to the interconnection.
What are the three important power system parameters that
must be within acceptable limits before re-synchronizing?
A. Phase angle, frequency, and voltage
B. Phase angle, voltage, and inductive reactance
C. Phase angle, frequency, and inductive reactance
D. Frequency, voltage, and inductive reactance
A. Phase angle, frequency, and voltage
Which of the following types of wind generators have the
ability to adjust the pitch of the rotor blades?
A. Active stall-controlled wind turbines
B. Pitch controlled wind turbines
C. Passive stall-controlled wind turbines
D. Blade adjustable wind turbines
B. Pitch controlled wind turbines
and Answers A+ Latest 2025
The transmission owner and distribution provider that owns
a UVLS system shall have equipment maintenance and
testing programs in place. This program shall include which
of the following?
1. Relays
2 instrument transformers
3 grounds
4 batteries
A. 2,3,&4
B. 1,3,&4
C. 1,2,&3
D. 1,2,&4
D. 1,2,&4
Transmission operator A has a step up transformer that has
a rating of 1000 MVA at a generating facility. The unit is
operating at full load and it is a peak day. Transmission
operator A gets an alarm from a step up transformer and
sees that it is loaded to 105% of its rated capacity.
Transmission operator A has how long to return the
transformer to the rated capacity?
A. 30 minutes
B. 20 minutes
C. 60 minutes
D. 15 minutes
A. 30 minutes
Who is responsible to know the status of all transmission
reactive power resources, including the status of voltage
regulators and power system stabilizers?
A. Transmission owner
B. Transmission operator
,C. Transmission service provider
D. Reliability authority
B. Transmission operator
What is the IEEE number for a differential relay?
A. 25
B. 50
C. 21
D. 87
D. 87
Who is responsible to initiate the confirmation process for
interchange schedules?
A Balancing Authority
B. Generation providing entity
C. Transmission service provider
D. Purchasing selling entity
A. Balancing authority
A 10% reduction in voltage results in the effective value of a
capacitor being
A. Reduced by more than 10%
B. Increased by 10%
C. Reduced 10%
D. Unchanged
A. Reduced by more than 10%
Generator #2 is putting out 100 MW to station A. There is 0
MW coming from system Z to station A. The MW flow on the
lines is as follows: line one has 50 MW from A to B, line 2 has
25 MW from A to B, and line 3 has 25 MW from A to B. If 100
MW were to flow in from system Z, what would be the new
MW flow on line 2
A. 50
B. 100
C. 25
D. 150
A. 50
,If the reliability coordinator identifies an IROL for a future
operating day due to scheduled outages, they are required to
do which of the following?
A. Develop a mitigation plan
B. Declare an EEA3 for the hours of concern
C. Cancel all outages for the operating day
D. Review its restoration plan
A. Develop a mitigation plan
Who can declare an energy emergency?
A. The deficient balancing authorities reliability coordinator
B. The deficient balancing authorities transmission operator
C. The deficient balancing authority
D. The deficient balancing authorities AGC operator
A. The deficient balancing authorities reliability coordinator
A transmission line between Bus A and Bus B has MW flow
from bus B to Bus A. The tripping of a parallel line has
caused the line from bus A to bus B to exceed its thermal
rating. which of the following actions would assist the
operator in correcting the problem.
A. Shed load at bus B
B. Decrease generation at bus A
C. Shed load at bus A
D. Increase generation at bus B
C. Shed load at bus A
If a dynamic transfer value is being used for a pseudo-tie,
what term is used when referring to the balancing authority
where the generator is physically located?
A. Sending BA
B. Receiving BA
C. Attaining BA
D. Native BA
D. Native BA
Each transmission operator and balancing authority shall
verify the restoration procedure by _____
A. Actual testing or simulation
, B. Planning and simulation
C. Planning and testing
D. Dispatcher input or testing
A. Actual testing or simulation
You are a balancing authority and get a call from your
purchase selling entity that an interchange transaction is to
start at the top of the hour and is sinking on your system.
There is no tag in place for this transaction but they are
adamant that it is supposed to start in five minutes. What do
you do?
A. Call the reliability coordinator
B. Notify them you have no tag therefore, no schedule will be
entered into the EMS
C. Enter the said transaction into your EMS/AGC system
D. Notify your shift Manager
B. Notify them you have no tag therefore, no schedule will be
entered into the EMS
Your system has experienced a total shut down. You have
worked your system restoration plan and with the help of the
RC you now seem to be ready to tie to the interconnection.
What are the three important power system parameters that
must be within acceptable limits before re-synchronizing?
A. Phase angle, frequency, and voltage
B. Phase angle, voltage, and inductive reactance
C. Phase angle, frequency, and inductive reactance
D. Frequency, voltage, and inductive reactance
A. Phase angle, frequency, and voltage
Which of the following types of wind generators have the
ability to adjust the pitch of the rotor blades?
A. Active stall-controlled wind turbines
B. Pitch controlled wind turbines
C. Passive stall-controlled wind turbines
D. Blade adjustable wind turbines
B. Pitch controlled wind turbines
