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HSI FINAL EXAM TEST QUESTIONS AND ANSWERS COMPLETE RATED A.
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HSI FINAL EXAM TEST QUESTIONS AND ANSWERS COMPLETE RATED A.
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HSI FINAL EXAM TEST QUESTIONS ANDANSWERS COMPLETE RATED A.
If a Balancing Authority is unable to purchase capacity or energy to meet
its demand and reserve requirements on a day-ahead or hour-by-hour
basis, which entity (or entities), is it expected to notify?
•All Reliability Coordinators and marketers
•All Reliability Coordinators
•Transmission Operators
•lts Reliability Coordinator and other Balancing Authorities
Verified Answer -•lts Reliability Coordinator and other Balancing
Authorities
Why are high transmission system voltages a problem during system
restoration ?
•Because of shunt reactors that were left in service after the system
collapse
•Because of insufficient MVAR supply from generators that tripped off
•Because of the excessive MVAR supply from generators
•Because of the excessive MVAR supply from energizing transmission
lines
Verified Answer -•Because of the excessive MVAR supply from
energizing transmission lines
A Balancing Authority anticipating an operating capacity or energy
emergency shall perform all actions necessary . including 1 ) bringing on
,all available generation 2 ) postponing equipment return . scheduling
interchange sales being prepared to reduce firm load
•2 and 3
•1 and 2
•1 and 4
•3 and 4
Verified Answer -•1 and 4
If a circuit breaker does not have a synch - check , reclosing relay and has
a large standing phase angle across it , how can the system operator know
if it is safe to close the breaker avoiding shock torque to the neighboring
generators ?
•Ask the generator operators to change reactive to a leading power factor
and then check the frequency
•Use the synchroscope in the substation control room as a guide to show
you how to adjust the system to improve the phase angle
•lf the voltage is within +/- 10 % it is OK to close the breaker
•Obtain help from the Regional operating committee engineers to advise
you .
Verified Answer -•Use the synchroscope in the substation control room as
a guide to show you how to adjust the system to improve the phase angle
A Balancing Authority anticipating a capacity or energy deficiency
emergency, shall perform which of the actions
•load shedding
,•voltage reduction
•transmission line switching
•all necessary actions
Verified Answer -•all necessary actions
How often should the Transmission Operator and Balancing Authority
review and update their Loss of Control Room Functionality Operating
Plan
•Every two years
•Every three years
•Annually
•As needed
Verified Answer -•Annually
During a system restoration , what is the system operators priority
•Restoration of interchange
•Restoration of off - site startup power to generating facilities
•Restoration of customer load •Interconnection frequency
Verified Answer -•Restoration of off - site startup power to generating
facilities
When synchronizing sections of the transmission system that have
separated or islanded , frequency and voltage magnitude on each side of
the breaker and the power angle across the breaker must be within proper
limits . To bring these values within proper limits , the system operator
should _______________?
, •Adjust the power angle on one side of the breaker to 90 degrees
•Adjust the tap changer on the nearest transformer
•Open additional lines until the voltage is matched
•Adjust generator MW and MVAR output in one of the areas
Verified Answer -•Adjust generator MW and MVAR output in one of the
areas
The initial response to a frequency deviation is due to which of the
following
1. Load / frequency response
2. AGC
3. Governor action
4. Interchange schedules
•3 and 4
•1 and 2
•2 and 3
•1 and 3
Verified Answer -•1 and 3
EMS and AGC have failed at 12:25 and generation must be controlled
manually. The operator calculates ACE to be +25 MWs. Load is expected
to increase 100 MWs, and imports will increase by 75 MWs at the top of
the hour. What should the operator do?
•Maintain current generation level
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