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PRACTICE TEST NERC QUESTIONS WITH CORRECT ANSWERS
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PRACTICE TEST NERC QUESTIONS WITH CORRECT ANSWERS
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KNOWN NERC EXAM QUESTIONS:FROM CLASS QUESTIONS WITH
CORRECT ANSWERS
A ssBalancing ssAuthority ssnotices ssthat ssOperating ssReserve sshas sssteadily ssdeclined
ssthroughout ssthe sshour. ssWhat ssis ssthe ssmost sslikely sscause?
a) ssLoss ssof ssa sslarge ssgenerator ssin ssthe ssarea
b) ssAn ssinaccurate ssload ssforecast
c) ssLoss ssof ssa ssmajor sstransmission ssline
d) ssA ssmalfunction ssof ssEMS ss- ssright ssanswer✔b) ssAn ssinaccurate ssload ssforecast
Balancing ssArea ssA ssnotices ssthat ssthe ssInterconnection ssfrequency ssis ss59.94 ssHz ssand
sstheir ssACE ssis ss0. ssWhich ssof ssthe ssfollowing sscould ssbe ssthe sscause ssof ssthis ssreading?
a) ssA ssnet ssunder-generation ssin ssBalancing ssArea ssA
b) ssA ssnet ssunder-generation ssin ssthe ssInterconnection
c) ssA ssloss ssof ssload ssin ssBalancing ssArea ssA
d) ssA ssloss ssof ssload ssin ssthe ssInterconnection ss- ssright ssanswer✔b) ssA ssnet ssunder-
generation ssin ssthe ssInterconnection
What ssis ssthe sspenalty ssfor ssa ssBalancing ssAuthority ssviolating ssthe ssDisturbance ssControl
ssStandard?
a) ssMust sscarry ssadditional ssContingency ssReserve
b) ssMust ssdevelop ssa sscorrection ssaction ssplan
c) ssMust ssre-evaluate ssand sschange ssits ssFrequency ssBias ssSetting
d) ssMust ssincrease ssits ssRegulating ssReserve ss- ssright ssanswer✔a) ssMust sscarry
ssadditional ssContingency ssReserve
Your ssACE ssis ssa sslarge ssnegative ssvalue ssand sssystem ssfrequency ssis ss59.80 ssHz. ssYour
ssAGC sssystem ssis sspulsing ssyour ssunits ssdown. ssWhat ssshould ssyou ssdo?
a) ssPlace ssAGC ssin ssflat ssfrequency sscontrol
b) ssPlace ssAGC ssin ssflat sstie ssline sscontrol
c) ssSuspend ssAGC ssand ssinvestigate
d) ssDo ssnothing ssas ssthis ssis ssnormal ss- ssright ssanswer✔c) ssSuspend ssAGC ssand
ssinvestigate
, When sstwo ssidentical ssgenerating ssunits ssare ssoperated ssin ssparallel sson ssgovernor
sscontrol, ssand sson ssmachine sshas ssa ss5% ssdroop ssand ssthe ssother sshas ssa ss10% ssdroop,
ssthe ssunit sswith ssthe ssgreater ss(10%) ssgovernor ssdroop sswill:
a) ssRespond ssless ssto ssfrequency ssdeviations
b) ssRespond ssmore ssto ssfrequency ssdeviations
c) ssRespond ssthe sssame ssto ssfrequency ssdeviations
d) ssNot ssadjust ssfor ssfrequency sschanges ss- ssright ssanswer✔a) ssRespond ssless ssto
ssfrequency ssdeviations
On ssa ssradial sstransmission sssystem ssa ssgenerator sshas ssa sscapacity ssof ss600 ssMWs. ssThe
ssDroop sscharacteristic ssis ssat ss5% ssand ssthe ssgenerator ssis sscurrently ssloaded ssat ss300
ssMWs. ssIf ssfrequency sssuddenly ssdrops ssto ss59.3 ssHz, sswhat sswould ssbe ssthe sstotal
ssgenerator ssoutput?
a) ss350
b) ss400
c) ss440 ss
d) ss600 ss- ssright ssanswer✔c) ss440
What ssis ssthe ssmain sspurpose ssof ssthe ssFrequency ssBias ssSetting ssin ssthe ssACE
ssequation?
a) ssControl ssfrequency ssto ss60 ssHz ssfor ssthe ssentire ssInterconnection
b) ssAssist sswith ssarresting ssfrequency ssdeviations
c) ssRestore ssfrequency ssto ss60 ssHz ssafter ssa ssdisturbance
d) ssmaintains ssfrequency ssbetween ss59.95 ssand ss60.05 ssHz ss- ssright ssanswer✔b) ssAssist
sswith ssarresting ssfrequency ssdeviations
A ssBalancing ssAuthority sshas ssa ssFrequency ssBias ssSetting ssof ss-200 ssMW/.1Hz. ssWhat ssis
ssthe ssBalancing ssAuthority's ssFrequency ssResponse ssfor ssa ssfrequency ssof ss59.95 ssHz?
a) ss10 ssMWs
b) ss50 ssMWs
c) ss100 ssMWs
d) ss200 ssMWs ss- ssright ssanswer✔c) ss100 ssMWs
Scheduled ssInterchange ssis ss250 ssMWs ssand ssActual ssInterchange ssis ss285 ssMWs. ssThe
ssBias ssSetting ssis ss35 ssMW/.1Hz ssand ssfrequency ssis ss60.00 ssHz sswith ssno sstime sserror
sscorrection ssin sseffect. ssFrequency sssuddenly ssdrops ssto ss59.80 ssHz. ssWhat ssdoes ssACE
ssindicate ssafter ssthe ssdisturbance?
a) ss70 ssMW ssunder-generating
b) ss70 ssMW ssover-generating
c) ss35 ssMW ssunder-generating
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