Question 1
What is the IEEE number for a Differential Relay?
A. 21
B. 25
C. 50
D. 87
CORRECT ANSWER
D. 87
Question 2
You BA area had two 100 MW interchange transactions at the start of last hour.
Transaction A started at 100 MW and was reduced to 50 MW on the half-hour. Transaction
B started at 100 and was reduced to 50 MW on the half-hour and then reduced to 0 MW at
quarter to the hour. What was the mwhr integration for last hour for your area (Ignore all
ramps)?
A. 62.5 mwhr
B. 125mwhr
C. 137.5 mwhr
D. 200 mwhr
CORRECT ANSWER
C. 137.5 mwhr
100*(30min/60)= 50mwhr + 50*(30/60)= 25 Total= 75mwhr
100*(30/60)= 50mwhr 50*(15/60)= 12.5 Total= 62.5+75= 137.5
1
@THE STUDY VAULT
,Question 3
You are a Transmission Operator and you have changed relay settings for your
Undervoltage Load Shedding Scheme in the Northern part of your system. Your neighbour
just to the North of you has a major generating facility rated at 1000MW and they supply
most of the MVAR for the area. They also monitor the MVAR flows on most of the Lines in
the area due to an NRC requirement regarding MVAR for a nuclear plant. Of the parties
listed below, who does not need to be notified of the changes made to the relay settings?
A. Transmission Operators
B. Transmission Service Providers
C. Balancing Authorities
D. Generation Operators
CORRECT ANSWER
B. Transmission Service Providers
Question 4
If you own or operate a UFLS program it must be updated at least how often?
A. Semi-annually
B. Every 5 years
C. Annually
D. Every 2 years
CORRECT ANSWER
C. Annually
Question 5
2
@THE STUDY VAULT
,You are replacing energy and capacity following the loss of a unit on your system that is
covered by an energy sharing agreement. You have how long before a tag must be
submitted?
A. 20 min
B. 60 min
C. 90 min
D. 15 min
CORRECT ANSWER
B. 60 min
Question 6
You are a Balancing Authority and get a call from your Purchase Selling Entity that a
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 suppose to start in 5 min. What
do you do?
A. Enter the said Transaction into your EMS/AGC system
B. Call the Reliability Coordinator
C. Notify them you have no tag therefore no schedule will be entered into the EMS
D. Notify your shift manager
CORRECT ANSWER
C. Notify them you have no tag therefore no schedule will be entered into the EMS
Question 7
You are a Transmission Operator implementing your company's restoration plan following
a system disturbance and subsequent blackout. You are in the restoration process and
have built your system to have 2,500 MW of synchronized generation and 1600 MW of
load restored. The frequency sudden declines to 58.5 Hz. How would you return the
frequency to 60Hz?
3
@THE STUDY VAULT
, A. Remove 250 MW of generation from service
B. Remove 240 MW of load
C. Increase 50 MW of generation
D. Remove 375 MW of load
CORRECT ANSWER
B. Remove 240 MW of load
Shed 6-10% of load= ~1Hz
1600*.1= 160MW for 1Hz therefore .5Hz would be 80MW
160+80= 240MW
Question 8
If you use a Dynamic Schedule that is less than or equal to 250MW, how much does the
average energy profile have to vary by in order to have to submit a new or modified tag?
A. 10%
B. 25MW
C. 25%
D. 10MW
CORRECT ANSWER
B. 25MW
Question 9
You are operating a system that has a previous year peak greater than 3,000MW, what is
the threshold for having to report a loss of firm load that last more than 15 min?
A. 50MW
B. 150MW
C. 300MW
4
@THE STUDY VAULT
What is the IEEE number for a Differential Relay?
A. 21
B. 25
C. 50
D. 87
CORRECT ANSWER
D. 87
Question 2
You BA area had two 100 MW interchange transactions at the start of last hour.
Transaction A started at 100 MW and was reduced to 50 MW on the half-hour. Transaction
B started at 100 and was reduced to 50 MW on the half-hour and then reduced to 0 MW at
quarter to the hour. What was the mwhr integration for last hour for your area (Ignore all
ramps)?
A. 62.5 mwhr
B. 125mwhr
C. 137.5 mwhr
D. 200 mwhr
CORRECT ANSWER
C. 137.5 mwhr
100*(30min/60)= 50mwhr + 50*(30/60)= 25 Total= 75mwhr
100*(30/60)= 50mwhr 50*(15/60)= 12.5 Total= 62.5+75= 137.5
1
@THE STUDY VAULT
,Question 3
You are a Transmission Operator and you have changed relay settings for your
Undervoltage Load Shedding Scheme in the Northern part of your system. Your neighbour
just to the North of you has a major generating facility rated at 1000MW and they supply
most of the MVAR for the area. They also monitor the MVAR flows on most of the Lines in
the area due to an NRC requirement regarding MVAR for a nuclear plant. Of the parties
listed below, who does not need to be notified of the changes made to the relay settings?
A. Transmission Operators
B. Transmission Service Providers
C. Balancing Authorities
D. Generation Operators
CORRECT ANSWER
B. Transmission Service Providers
Question 4
If you own or operate a UFLS program it must be updated at least how often?
A. Semi-annually
B. Every 5 years
C. Annually
D. Every 2 years
CORRECT ANSWER
C. Annually
Question 5
2
@THE STUDY VAULT
,You are replacing energy and capacity following the loss of a unit on your system that is
covered by an energy sharing agreement. You have how long before a tag must be
submitted?
A. 20 min
B. 60 min
C. 90 min
D. 15 min
CORRECT ANSWER
B. 60 min
Question 6
You are a Balancing Authority and get a call from your Purchase Selling Entity that a
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 suppose to start in 5 min. What
do you do?
A. Enter the said Transaction into your EMS/AGC system
B. Call the Reliability Coordinator
C. Notify them you have no tag therefore no schedule will be entered into the EMS
D. Notify your shift manager
CORRECT ANSWER
C. Notify them you have no tag therefore no schedule will be entered into the EMS
Question 7
You are a Transmission Operator implementing your company's restoration plan following
a system disturbance and subsequent blackout. You are in the restoration process and
have built your system to have 2,500 MW of synchronized generation and 1600 MW of
load restored. The frequency sudden declines to 58.5 Hz. How would you return the
frequency to 60Hz?
3
@THE STUDY VAULT
, A. Remove 250 MW of generation from service
B. Remove 240 MW of load
C. Increase 50 MW of generation
D. Remove 375 MW of load
CORRECT ANSWER
B. Remove 240 MW of load
Shed 6-10% of load= ~1Hz
1600*.1= 160MW for 1Hz therefore .5Hz would be 80MW
160+80= 240MW
Question 8
If you use a Dynamic Schedule that is less than or equal to 250MW, how much does the
average energy profile have to vary by in order to have to submit a new or modified tag?
A. 10%
B. 25MW
C. 25%
D. 10MW
CORRECT ANSWER
B. 25MW
Question 9
You are operating a system that has a previous year peak greater than 3,000MW, what is
the threshold for having to report a loss of firm load that last more than 15 min?
A. 50MW
B. 150MW
C. 300MW
4
@THE STUDY VAULT
