KNOWN NERC EXAM QUESTIONS: FROM CLASS QUESTIONS AND CORRECT VERIFIED ANSWERS

KNOWN NERC EXAM QUESTIONS: FROM
CLASS QUESTIONS AND CORRECT
VERIFIED ANSWERS
AA2BalancingA2AuthorityA2noticesA2thatA2OperatingA2ReserveA2hasA2steadilyA2declinedA2thr
oughoutA2theA2hour.A2WhatA2isA2theA2mostA2likelyA2cause?

a)A2LossA2ofA2aA2largeA2generatorA2inA2theA2area
b)A2AnA2inaccurateA2loadA2forecast
c)A2LossA2ofA2aA2majorA2transmissionA2line
d)A2AA2malfunctionA2ofA2EMSA2-A2Ans--A2b)A2AnA2inaccurateA2loadA2forecast

BalancingA2AreaA2AA2noticesA2thatA2theA2InterconnectionA2frequencyA2isA259.94A2HzA2andA
2theirA2ACEA2isA20.A2WhichA2ofA2theA2followingA2couldA2beA2theA2causeA2ofA2thisA2reading?


a)A2AA2netA2under-generationA2inA2BalancingA2AreaA2A
b)A2AA2netA2under-generationA2inA2theA2Interconnection
c)A2AA2lossA2ofA2loadA2inA2BalancingA2AreaA2A
d)A2AA2lossA2ofA2loadA2inA2theA2InterconnectionA2-A2Ans--A2b)A2AA2netA2under-
generationA2inA2theA2Interconnection

WhatA2isA2theA2penaltyA2forA2aA2BalancingA2AuthorityA2violatingA2theA2DisturbanceA2Contro
lA2Standard?

a)A2MustA2carryA2additionalA2ContingencyA2Reserve
b)A2MustA2developA2aA2correctionA2actionA2plan
c)A2MustA2re-evaluateA2andA2changeA2itsA2FrequencyA2BiasA2Setting
d)A2MustA2increaseA2itsA2RegulatingA2ReserveA2-A2Ans--
A2a)A2MustA2carryA2additionalA2ContingencyA2Reserve


YourA2ACEA2isA2aA2largeA2negativeA2valueA2andA2systemA2frequencyA2isA259.80A2Hz.A2You
rA2AGCA2systemA2isA2pulsingA2yourA2unitsA2down.A2WhatA2shouldA2youA2do?

a)A2PlaceA2AGCA2inA2flatA2frequencyA2control
b)A2PlaceA2AGCA2inA2flatA2tieA2lineA2control
c)A2SuspendA2AGCA2andA2investigate
d)A2DoA2nothingA2asA2thisA2isA2normalA2-A2Ans--A2c)A2SuspendA2AGCA2andA2investigate

WhenA2twoA2identicalA2generatingA2unitsA2areA2operatedA2inA2parallelA2onA2governorA2cont
rol,A2andA2onA2machineA2hasA2aA25%A2droopA2andA2theA2otherA2hasA2aA210%A2droop,A2theA
2unitA2withA2theA2greaterA2(10%)A2governorA2droopA2will:


a)A2RespondA2lessA2toA2frequencyA2deviations
b)A2RespondA2moreA2toA2frequencyA2deviations

, c)A2RespondA2theA2sameA2toA2frequencyA2deviations
d)A2NotA2adjustA2forA2frequencyA2changesA2-A2Ans--
A2a)A2RespondA2lessA2toA2frequencyA2deviations


OnA2aA2radialA2transmissionA2systemA2aA2generatorA2hasA2aA2capacityA2ofA2600A2MWs.A2T
heA2DroopA2characteristicA2isA2atA25%A2andA2theA2generatorA2isA2currentlyA2loadedA2atA230
0A2MWs.A2IfA2frequencyA2suddenlyA2dropsA2toA259.3A2Hz,A2whatA2wouldA2beA2theA2totalA2g
eneratorA2output?

a)A2350
b)A2400
c)A2440A2
d)A2600A2-A2Ans--A2c)A2440

WhatA2isA2theA2mainA2purposeA2ofA2theA2FrequencyA2BiasA2SettingA2inA2theA2ACEA2equati
on?

a)A2ControlA2frequencyA2toA260A2HzA2forA2theA2entireA2Interconnection
b)A2AssistA2withA2arrestingA2frequencyA2deviations
c)A2RestoreA2frequencyA2toA260A2HzA2afterA2aA2disturbance
d)A2maintainsA2frequencyA2betweenA259.95A2andA260.05A2HzA2-A2Ans--
A2b)A2AssistA2withA2arrestingA2frequencyA2deviations


AA2BalancingA2AuthorityA2hasA2aA2FrequencyA2BiasA2SettingA2ofA2-
200A2MW/.1Hz.A2WhatA2isA2theA2BalancingA2Authority'sA2FrequencyA2ResponseA2forA2aA2fr
equencyA2ofA259.95A2Hz?

a)A210A2MWs
b)A250A2MWs
c)A2100A2MWs
d)A2200A2MWsA2-A2Ans--A2c)A2100A2MWs

ScheduledA2InterchangeA2isA2250A2MWsA2andA2ActualA2InterchangeA2isA2285A2MWs.A2The
A2BiasA2SettingA2isA235A2MW/.1HzA2andA2frequencyA2isA260.00A2HzA2withA2noA2timeA2errorA
2correctionA2inA2effect.A2FrequencyA2suddenlyA2dropsA2toA259.80A2Hz.A2WhatA2doesA2ACE
A2indicateA2afterA2theA2disturbance?


a)A270A2MWA2under-generating
b)A270A2MWA2over-generating
c)A235A2MWA2under-generating
d)A235A2MWA2over-generatingA2-A2Ans--A2d)A235A2MWA2over-generating

InadvertentA2energyA2accumulationA2occursA2dueA2toA2aA2differenceA2inA2NetA2ActualA2Inte
rchangeA2andA2NetA2InterchangeA2ScheduleA2overA2time.A2ThisA2energyA2accumulationA2c
anA2beA2paidA2backA2unilaterallyA2byA2adjustingA2deliveryA2ofA2power:A2