Homeland Security HSI Final Test 5 EXAM LATEST 2026-
2027 100 QUESTIONS AND 100% Verified ANSWERS
Which entity shall have an Operating Plan for next - day operations ?
•Bulk Electric System
•All Reliability Coordinators
•System Planners
•Balancing Authority and Transmission Operators - answer>>•Balancing Authority and Transmission Operators
If you remove a parallel transmission line from service to relieve an IROL or SOL violation , what will happen to the
loading on the remaining transmission facilities
•Increase
•Decrease
•Voltage will increase on these lines
•Probably stay the same - answer>>•Increase
Each Transmission Operator , and Balancing Authority shall have Interpersonal Communication capability with at
least which of the following ?
•Only TOP's operating within the Reliability Area boundaries
•Its RC and the respective adjacent TOP or BA
•The Department of Energy Operations Center
•All Reliability Coordinators in NERC - answer>>•Its RC and the respective adjacent TOP or BA
Several lines in your area are out of service for routine relay maintenance ? Severe thunderstorms are expected
during peak demand later in the day . What action should the System Operator take ?
•Place lines back in service with normal protection
,•No action is necessary
•Place lines back in service without normal protection
•Place additional generation on line - answer>>•Place lines back in service with normal protection
To predict the system's near - term load pattern , a system operator must have information including weather
forecasts and
•Generator overhaul schedules
•Sufficient metering
•Generator efficiency ratings
•Past load patterns - answer>>•Past load patterns
The Transmission Operator that you work for is installing new relays on some of their major transmission tie lines
using newer technology . Who should your company notify before the work is begun
•Neighboring Transmission Operators, Balancing Authorities, and Generator Operators
•NERC Operating Committee
•Adjacent transmission operators
The Reliability Coordinator only• - answer>>•Neighboring Transmission Operators, Balancing Authorities, and
Generator Operators
One purpose for special protection system or remedial action schemes is to
•ensure proper breaker tripping and reclosing
•isolate electrical faults
•provide additional load information to the operator
•balance load and generation after a loss of resources - answer>>•balance load and generation after a loss of
resources
• Breaker Failure - answer>>
, operate . How did the current and voltage A storm blows A phase and B phase conductors of a 138 kV transmission
line together , creating a phase to phase fault . The magnitude of the current and voltage changed instantly allow
the line distance relays at each end of the line to on that line change providing the input for the relay to indicate a
fault on the line ?
•Voltage decreased and the current increased
•Voltage increased and the current decreased
•Voltage increased and the current increased
•Voltage decreased and the current decreased - answer>>•Voltage decreased and the current increased
On a 230KV transmission system , substation A is sending substation B 250 megawatts . The sending bus A voltage
is at 231KV . The receiving bus B voltage is 228KV . The reactive power flow is heavy between substation A and
Substation B. What can the transmission operator for substation B do to increase the bus voltage at substation B
to reduce the reactive flow between the two stations
•Never allow heavy reactive users to place demand where reactive resources are not available
•Utilize reactive resources located close to substation
•Run open on the lines that feed the busses with lower reactive power
•Back down the reactive output of generators near substation A to avoid large differences in the reactive flow
between the two stations - answer>>•Utilize reactive resources located close to substation
Under Voltage Load Shed ( UVLS ) schemes are designed to drop load in
•low load areas
•high load areas
•industrial load areas
•pre - selected blocks - answer>>•pre - selected blocks
If reactive resources are limited , a Transmission Operator should :
1 ) Keep voltage schedules as low as the voltage schedules allow
2027 100 QUESTIONS AND 100% Verified ANSWERS
Which entity shall have an Operating Plan for next - day operations ?
•Bulk Electric System
•All Reliability Coordinators
•System Planners
•Balancing Authority and Transmission Operators - answer>>•Balancing Authority and Transmission Operators
If you remove a parallel transmission line from service to relieve an IROL or SOL violation , what will happen to the
loading on the remaining transmission facilities
•Increase
•Decrease
•Voltage will increase on these lines
•Probably stay the same - answer>>•Increase
Each Transmission Operator , and Balancing Authority shall have Interpersonal Communication capability with at
least which of the following ?
•Only TOP's operating within the Reliability Area boundaries
•Its RC and the respective adjacent TOP or BA
•The Department of Energy Operations Center
•All Reliability Coordinators in NERC - answer>>•Its RC and the respective adjacent TOP or BA
Several lines in your area are out of service for routine relay maintenance ? Severe thunderstorms are expected
during peak demand later in the day . What action should the System Operator take ?
•Place lines back in service with normal protection
,•No action is necessary
•Place lines back in service without normal protection
•Place additional generation on line - answer>>•Place lines back in service with normal protection
To predict the system's near - term load pattern , a system operator must have information including weather
forecasts and
•Generator overhaul schedules
•Sufficient metering
•Generator efficiency ratings
•Past load patterns - answer>>•Past load patterns
The Transmission Operator that you work for is installing new relays on some of their major transmission tie lines
using newer technology . Who should your company notify before the work is begun
•Neighboring Transmission Operators, Balancing Authorities, and Generator Operators
•NERC Operating Committee
•Adjacent transmission operators
The Reliability Coordinator only• - answer>>•Neighboring Transmission Operators, Balancing Authorities, and
Generator Operators
One purpose for special protection system or remedial action schemes is to
•ensure proper breaker tripping and reclosing
•isolate electrical faults
•provide additional load information to the operator
•balance load and generation after a loss of resources - answer>>•balance load and generation after a loss of
resources
• Breaker Failure - answer>>
, operate . How did the current and voltage A storm blows A phase and B phase conductors of a 138 kV transmission
line together , creating a phase to phase fault . The magnitude of the current and voltage changed instantly allow
the line distance relays at each end of the line to on that line change providing the input for the relay to indicate a
fault on the line ?
•Voltage decreased and the current increased
•Voltage increased and the current decreased
•Voltage increased and the current increased
•Voltage decreased and the current decreased - answer>>•Voltage decreased and the current increased
On a 230KV transmission system , substation A is sending substation B 250 megawatts . The sending bus A voltage
is at 231KV . The receiving bus B voltage is 228KV . The reactive power flow is heavy between substation A and
Substation B. What can the transmission operator for substation B do to increase the bus voltage at substation B
to reduce the reactive flow between the two stations
•Never allow heavy reactive users to place demand where reactive resources are not available
•Utilize reactive resources located close to substation
•Run open on the lines that feed the busses with lower reactive power
•Back down the reactive output of generators near substation A to avoid large differences in the reactive flow
between the two stations - answer>>•Utilize reactive resources located close to substation
Under Voltage Load Shed ( UVLS ) schemes are designed to drop load in
•low load areas
•high load areas
•industrial load areas
•pre - selected blocks - answer>>•pre - selected blocks
If reactive resources are limited , a Transmission Operator should :
1 ) Keep voltage schedules as low as the voltage schedules allow
