nerc miss question Questions & Answer key
Voltage and current
Two phase conductors of
a 138kV transmission line
come in contact due to a
storm, creating a phase to
phase fault. The distance
relay at each end of the
line tripped and isolated
the line. What two
measured parameters of
the line caused the
distance relay to operate?
Temperature and length
MWs and MVARs
Voltage and current
Resistance and
Impedance
A shortage of reactive resources
What is the main cause
for having low voltage on
the Transmission and
Distribution system?
Over generation in the
Interconnection
Not enough transmission
line in service
Excessive of reactive
resources
A shortage of reactive
resources
, nerc miss question Questions & Answer key
The loss of two 400 MW units 30 seconds apart.
The largest single
contingency for Balancing
Authority A is a unit rated
at 900 MW. Which of the
following disturbances
would constitute a
reportable disturbance for
DCS evaluation based on
the NERC DCS criteria?
The loss of a 700 MW
generating unit at 100%
output.
The loss of the 900 MW
generating unit at 60%
output.
The loss of two 400 MW
units 30 seconds apart.
The loss of 750 MW of
firm load.
Raise generator
Which of the following
actions is appropriate for
preserving the reliability of
the Interconnection during
a low voltage emergency?
Switch in reactors
Arrange for interchange
sales during high price
periods
Removing key
transmission lines from
service
Raise generator
, nerc miss question Questions & Answer key
160 MVA
A conductor is rated for
180 MVA, the current
transformer at one end is
rated at 160 MVA and the
bus is rated at 200 MVA.
What is the MVA limit for
this transmission line?
180 MVA
200 MVA
160 MVA
100 MVA
20 MW out
Frequency has been
running at 59.96 Hz for
the last hour and your
ACE has hovered right at
zero for the entire hour.
Your Frequency Bias
Setting (B) is 50 MW/.1
Hz. What would be your
approximate Inadvertent
Interchange for the hour?
Zero
40 MWs out
20 MW out
20 MWs in
Voltage and current
Two phase conductors of
a 138kV transmission line
come in contact due to a
storm, creating a phase to
phase fault. The distance
relay at each end of the
line tripped and isolated
the line. What two
measured parameters of
the line caused the
distance relay to operate?
Temperature and length
MWs and MVARs
Voltage and current
Resistance and
Impedance
A shortage of reactive resources
What is the main cause
for having low voltage on
the Transmission and
Distribution system?
Over generation in the
Interconnection
Not enough transmission
line in service
Excessive of reactive
resources
A shortage of reactive
resources
, nerc miss question Questions & Answer key
The loss of two 400 MW units 30 seconds apart.
The largest single
contingency for Balancing
Authority A is a unit rated
at 900 MW. Which of the
following disturbances
would constitute a
reportable disturbance for
DCS evaluation based on
the NERC DCS criteria?
The loss of a 700 MW
generating unit at 100%
output.
The loss of the 900 MW
generating unit at 60%
output.
The loss of two 400 MW
units 30 seconds apart.
The loss of 750 MW of
firm load.
Raise generator
Which of the following
actions is appropriate for
preserving the reliability of
the Interconnection during
a low voltage emergency?
Switch in reactors
Arrange for interchange
sales during high price
periods
Removing key
transmission lines from
service
Raise generator
, nerc miss question Questions & Answer key
160 MVA
A conductor is rated for
180 MVA, the current
transformer at one end is
rated at 160 MVA and the
bus is rated at 200 MVA.
What is the MVA limit for
this transmission line?
180 MVA
200 MVA
160 MVA
100 MVA
20 MW out
Frequency has been
running at 59.96 Hz for
the last hour and your
ACE has hovered right at
zero for the entire hour.
Your Frequency Bias
Setting (B) is 50 MW/.1
Hz. What would be your
approximate Inadvertent
Interchange for the hour?
Zero
40 MWs out
20 MW out
20 MWs in
