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HSI Final Test Questions with Correct Answers 100% Pass 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 - ANSWER-•1 and 3 EMS and A...

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  • November 11, 2024
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  • 2024/2025
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HSI Final Test Questions with Correct

Answers 100% Pass


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 - 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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•Decrease generation by 25 MWs


•Decrease generation by 50 MWs


•Increase generation by 25 MW - ANSWER✔✔-•Decrease generation by 25 MWs


How is the Frequency Response Measure (FRM) of a Balancing Authority determined?




•lt is the average of the BA's frequency response for all the frequency deviations of the previous year


•lt is the change in the BA's Net Interchange Actual for the largest frequency deviation during the

previous year


•lt is the previous year's Control Performance Standard 1 ( CPS1 ) score


•It is the median of the BA's frequency response for the frequency deviation events identified by NERC

for the previous year - ANSWER✔✔-•It is the median of the BA's frequency response for the frequency

deviation events identified by NERC for the previous year


Sufficient Operating Reserve is defined as the capacity required to meet what?




•DOE specifications


•CPS and DCS


•CPS 1 & 2 only


•Capacity Standard - ANSWER✔✔-•CPS and DCS




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In your Interconnection , a generator tripped that was large enough to reduce the frequency from 60.00

Hz to 59.94 Hz . Your Balancing Authority's Frequency Bias is -200 MW / 0.1 Hz . How many MW would

your system initially contribute to frequency support?




•120 MW


•80 MW


•100 MW


•200 MW - ANSWER✔✔-•120 MW


Interconnection frequency is 59.80 Hz . Your ACE is a large negative value and your AGC is pulsing your

units down . What should you do




•Leave AGC in operation but investigate


•Place AGC in constant frequency control


•Place AGC in flat tie line control


•Suspend AGC and investigate - ANSWER✔✔-•Suspend AGC and investigate


When a Balancing Authority's ACE value is the same sign as the frequency deviation , which NERC control

performance score is affected negatively




•DCS




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•CPS 1


•TEC


•BAAL - ANSWER✔✔-•CPS 1


Correct Of the following , which control system would be affected by a difference in Net Actual

Interchange and Net Scheduled Interchange




•Reactive Control


•Turbine Governor Control


•Automatic Generation Control


•Automatic Voltage Regulator - ANSWER✔✔-•Automatic Generation Control


Balancing Authority A is currently reading a system frequency of 59.98 Hz . Its Net Actual Interchange is

+100 MW and its Net Scheduled Interchange is +100 MW . If Balancing Authority A's frequency bias

setting is 100 MW / 0.1 HZ , what is ACE




• -20


•20


•2


•0 - ANSWER✔✔-• -20




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