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ABYC Marine Electrical Certification Exam Review Questions and Answers
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ABYC Marine Electrical CertificationExam Review Questions and Answers
Every ii18 iiinches. ii- iiAnswers ii-How iioften ii(in iiinches) iishall iiwire iibundles iibe
iisupported?
Insulated iiMetallic iiHanger iiClamps ii- iiAnswers ii-What iitype iiof iiclamps iiare iito iibe iiused
iifor iisupporting iiwire iibundles iiwhen iirouted iiover iiengines iiand iimachinery?
40 iilbs ii(E-11 iiTable iiXV) ii- iiAnswers ii-What iitensile iiforce iimust iia ii10 iiGauge iicrimp
iiconnector iiwithstand iifor iione iiminute?
36 iiinches ii- iiAnswers ii-What iiis iithe iimax iiallowed iiunsupported iicable iilength iifor
iibattery iicables?
True ii- iiAnswers ii-T iior iiF: iiRunning iiAC iiand iiDC iiconductors iitogether iiis iiallowed iiso
iilong iias iithe iiAC iiconductors iiare iisheathed.
C. iiUnwanted iiopen ii- iiAnswers ii-The iimost iicommon iielectrical iicircuit iiproblem iiin
iimarine iiapplications iiis:
A. iiShort iicircuits
B. iiToo iimuch iicontinuity
C. iiUnwanted iiopen
D. iiInter iicircuit iiShort
D. iiHeat ii- iiAnswers ii-The iiprimary iiby-product iiof iiexcessive iielectrical iiresistance iiis:
A. iiIncreased iiAmperage
B. iiIncreased iiVoltage
C. iiReduced iiAmbient iiTemperature
D. iiHeat
1 iiHP ii= ii746 iiWatts ii- iiAnswers ii-One iiHP ii= iihow iimany iiwatts?
D. iiTDR ii(time-domain iireflectometer) ii- iiAnswers ii-What iiis iithe iipreferred iitool iifor
iitracing iishorted iiand iiopen iicircuits?
A. iiOhm iimeter
B. iiAmp iiclamp
C. iiVolt iimeter
D. iiTDR ii(time-domain iireflectometer)
,0 iiAWG ii- iiAnswers ii-A iitechnician iiis iiinstalling iia iicable iirun iifrom iithe iibatteries iito iithe
iimain iiDC iipanel iiboard iion iia iiboat iias iipart iiof iia iirefit. iiThe iiboat iihas iia ii12-volt iisystem
iiand iithe iidistance iiform iithe iipanel iito iithe iibatteries iiis ii15 iift. iiThe iimaximum iicurrent
iidraw iifrom iithe iipanel iiis iicalculated iiat ii90 iiamps. iiWhat iiguage iicable iishould iibe iiused
ii(minimum)?
Yellow ii- iiAnswers ii-DC iigrounded iiconductors iion iinew iiboats iithat iiare iialso iiequipped
iiwith iiAC iisystems iishould iiuse iiwhat iicolor iiinsulated iiwire?
16 iiAWG ii- iiAnswers ii-What iiis iithe iismallest iiguage iiwire iiallowed iifor iiunsheathed iiwire
iiruns iithrough iithe iiboat?
False. iiStart iibatteries iihave iia iigreater iinumber iiof iithinner iiplates iiwithin iieach iicell. ii-
iiAnswers ii-T iior iiF: iiCompared iito iideep iicycle ii(house) iibatteries, iicranking iibatteries
iiwill iihave iithicker iilead iiplates iito iifacilitate iithe iihigher, iishort-duration iicurrent iidraws.
Cranking ii- iiAnswers ii-Which iitype iiof iibattery iigenerally iirecharges iifaster? iiDeep iicycle
iior iicranking?
Wire iibrush iiand iibacking iisoda. ii- iiAnswers ii-What iitool iiand iicommon iihousehold
iistaple iiare iiused iito iiclean iibattery iiterminals?
Most iiof iithe iisulfuric iiacid iihas iibeen iiabsorbed iiinto iithe iilead iiplates, iileaving iimostly
iiwater iiin iithe iielectrolyte. ii- iiAnswers ii-Why iimight iia iifully-discharged iiwet-cell iitype
iibattery iifreeze?
1 iiinch, ii90 iilbs iior ii2x iithe iibattery iiweight, iifor ii1 iiminute iiin iieach iidirection. ii- iiAnswers
ii-Batteries iimust iibe iisecured iito iiprevent iimovement iiof iimore iithan ii______ iiinches iiin
iiany iidirection iiwhen iia iipulling iiforce iiof ii_____ iior ii_____, iiwhichever iiis iiless, iiis
iiapplied iithrough iithe iicenter iiof iigravity iiof iithe iibattery iifor iihow iilong?
True ii- iiAnswers ii-T iior iiF: iiit iiis iiok iito iiinstall iibatteries iidirectly iibelow iian iiuninterrupted
iifuel iiline?
Must iibe iiprotected iiwith iidielectric iiinsulating iimaterial ii- iiAnswers ii-What iiprovision
iimust iibe iiin iiplace iion iiany iifuel iiline iilocated iiwithin ii12 iiinches iiof iia iibattery iiterminals?
80 iiF, ii25 iiAmps, ii10.5 iiVolts ii- iiAnswers ii-Define: iiBattery iireserve iicapacity ii= iithe
iinumber iiof iiminutes iithat iia iinew, iifully iicharged iibattery iiat ii______ iidegrees iiF iican iibe
iicontinuously iidischarged iiat ii______ iiamps iiwhile iimaintaining ii_____ iivolts ii(for iia ii12
iiv iibattery)
90 iiminutes ii- iiAnswers ii-According iito iiABYC, iiwhat iiis iithe iiminimum iibattery iireserve
iicapacity?
,32 iidegrees iiF, ii30 iiseconds, ii7.2V ii- iiAnswers ii-Define: iiMarine iiCranking iiAmps ii= iithe
iidischarge iiload, iiin iiamperes, iithat iia iinew, iifully-charged iibattery iiat ii_____ iidegrees iiF
iican iideliver iifor ii______ iiseconds iiwhile iimaintaining iia iivoltage iiof ii_____ iivolts ii(for iia
ii12 iiv iibattery).
0 iidegrees iiF, ii30 iiseconds, ii7.2V ii- iiAnswers ii-Define: iiCold iiCranking iiAmps ii= iithe
iidischarge iiload, iiin iiamperes, iithat iia iinew, iifully-charged iibattery iiat ii_____ iidegrees iiF
iican iideliver iifor ii______ iiseconds iiwhile iimaintaining iia iivoltage iiof ii_____ iivolts ii(for iia
ii12 iiv iibattery).
8 iiAWG ii- iiAnswers ii-What iiis iithe iilargest iiguage iiwire iithat iimay iibe iiconnected iito iia
iibettery iiwith iiwing-nuts?
800 iiCCA iior ii100 iiAhr ii(exceptions: iielectronic iiequipment iiwith iibattery iibacked
iimemories; iisafety iiequipment iisuch iias iibilge iipumps, iialarms, iiCO iidetectors, iibilge
iiblowers; iibattery iichargers; iiI'm iipressed iicurrent iisystems. ii- iiAnswers ii-Per iiABYC iiE-
10, iia iibattery iiswitch iimust iibe iiinstalled iiin iithe iipositive iiconductor iifrom iieach iibattery
iibank iiwith iia iiCCA iirating iigreater iithan ii____ ii(or iigreater iithan ii_____ iiAh iiif iiCCA
iirating iinot iiavailable).
AIC ii= ii5000 iiAmps ii(E-11 iitable iiIV-A) ii- iiAnswers ii-What iiis iithe iiminimum iiampere
iiinterrupting iicapacity ii(AIC) iifor iimain iiovercurrent iiprotection iion iia iibattery iibank iirated
iiat ii12 iiV, ii1500 iiCCA?
AIC ii= ii2X iimnfg's iishort-circuit iirating iior ii100X iinominal iiAhr iirating. ii- iiAnswers ii-What
iiis iithe iiminimum iiampere iiinterrupting iicapacity ii(AIC) iifor iimain iiovercurrent iiprotection
iion iia iibattery iibank iirated iiat iimore iithan ii2200 iiCCA iior iimore iithan ii500 iiAhr?
False. ii"Readily iiaccessible" iidefines iientry iiinto iithe iiengine iiroom iiin iian iiemergency iias
iidangerous ii- iiuse iia iiremote iibattery iiswitch. ii- iiAnswers ii-T iior iiF: iiit iiis iiok iito iimount iia
iibattery iiswitch iiinside iian iiengine iiroom, iibecause iiABYC iistartes iithat iiit iimust iibe
iilocated iias iiclose iito iithe iibatteries iias iipractical.
Overcurrent iiprotection iimust iibe iilocated iiwithing ii7 iiinches iiof iithe iipower iisource
iiunless iicontained iiwithin iia iisheath, iiin iiwhich iicase iiit iimay iibe iiup iito ii40 iiinches iiaway.
iiIf iithe iipower iisource iiis iia iibattery iiand iithe iiconductors iiare iisheathed, iiOC iimay iibe iiup
iito ii72 iiinches iiaway. ii- iiAnswers ii-Explain iithe ii"7-40-72" iirule
Resetting iimechanism iicannot iioverrid iiover iicurrent iiinterrupting iimechanism. ii(Note:
iisome iiresidential iibreakers iiare iinot iitrip iifree) ii- iiAnswers ii-What iidoes ii"trip iifree"
iibreaker iimean?
C. ii14.1 iiV ii- iiAnswers ii-The iimaximum iisustained iicharging iivoltage iiacceptable iito
iisome iigell iicell iibattery iimanufacturers iiis:
A. ii13.8 iiV
B. ii14.5 iiV
, C. ii14.1 iiV
D. ii13.2 iiVll
0.050 iipoints iiof iispecific iigravity iibelow iiother iicells ii= iibad iicell. ii- iiAnswers ii-When
iitesting iia iiwet-cell iibattery iiwith iia iihydrometer, iiwhat iithreshold iiis iiused iito iidetermine
iia iibad iicell?
1.260 ii- ii1.285 ii(temperature iidependent) ii- iiAnswers ii-When iitesting iia iiwet-cell iibattery
iiwith iia iihydrometer, iiwhat iireading iiindicates iia iifully iicharged iibattery?
50% ii- iiAnswers ii-When iitesting iia iifully iicharged iistart iibattery iifor iicapacity iiwith iia iiload
iitester, iiwhat ii% iiof iiCCA iirating iishould iibe iiinduced iiby iithe iiload iito iitest iiresulting
iivoltage?
C. iiBetween ii150% iiand ii200% ii- iiAnswers ii-Most iiengine-driven iialternators iiare
iioptimally iispun iiat iiwhat iipercentage iiof iiengine iiRPMs?
A. iiBetween ii10% iiand ii50%
B. iiLess iithan ii10%
C. iiBetween ii150% iiand ii200%
D. iiGreater iithan ii200%
False. iithe iibattery iicharger iicase iishall iibe iitied iito iithe iiengine iinegative iiterminal/bus,
iialong iiwith iithe iinegative iioutput iiterminal iiof iithe iibattery iicharger, iinot iiat iithe iibattery
iicharger iicase iiitself., ii- iiAnswers ii-T iior iiF: iiA iibattery iicharger iicase iishall iibe iitied iito
iithe iiDC iinegative iioutput iiterminal iiat iithe iibattery iicharger.
In iicase iiof iian iiinternal iishort iito iithe iicase, iithe iiAC iigrounding iiwire iiwould iinot iicarry
iienough iicurrent. ii- iiAnswers ii-Why iido iibattery iichargers iirequire iia iiseparate iicase
iiconnection iito iimain iiAC iigrounding iibus iiand iiEngine iinegative ii/ iiDC iigrounding iibus?
No iismaller iithan ii1 iisize iibelow iithe iiDC iicurrent iicarrying iiconductors iibetween iithe
iicharger iiand iibatteries ii- iiprovided iiOC iiprotection iion iipositive iiDC iioutput iiis iino
iigreater iithan ii135% iiof iiDC iigrounding iicable iiampacity iiand iiconductor iiis iino iismaller
iithan ii16 iiAWG. ii- iiAnswers ii-What iiis iithe iiminimal iiwire iisize iirequired iifor iia iibattery
iicharger iicase iiconnection iito iiDC iiground/engine iinegative?
Class iiT iifuse iirated iifor iiappropriate iiAIC ii- iiAnswers ii-What iidevice iiis iitypically iifound
iito iisatisfy iithe iirequired iiOC iiprotection iibetween iia iibattery iicharger iiand iithe iibatteries?
Batteries iiwill iifeed iiback iiinto iisolar iiarray iior iiwind iigenerator iicoil iiand iidischarge
ii(possibly iidamage). iiNote: iimany iivoltage iiregulators iihave iiintegral iiblocking iidiodes. ii-
iiAnswers ii-What iimay iihappen iito iia iisolar iiarray iior iiwind iigenerator iiused iito iicharge
iibatteries iiwithout iia iiblocking iidiode?
24 iiinches iior iimore ii(unless iiwaterproof!) ii- iiAnswers ii-How iifar iiabove iibilge iiwater iilevel
iimust iia iibattery iicharger iibe iimounted?
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