ABYC Marine Electrical Certification Study Guide 2025-2026, Exams of Electrical Engineering

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ABYC Marine Electrical Certification Study Guide 2025 - 2026

the reverse polarity indicator is an LED with 2 legs. One of these legs have a resistor of - 5k Ohms Anodes used in cathodic protection systems shall be painted with a protcctive barricr coating field voltage _ANSWER-cleans signal isolator transformer - CORR! NSWER-250% commutator - ¢ electrical current flows from the generator armature - CORRECT ANSWER the iron the coil goes on else on the mast and filed to a sharp point independent breaker to - CORRECT ANSWER-activate inverter ohm meter reads - CORRECT ANSWER-amps AC only single phase - CORRECT ANSWER-needs netural ground fault - CORRECT ANSWER if electricity leaks from intended paths in these 2 wires (ac hot and neutral) battery isolator - CORRECT ANSWER-charge batteries with 1 alternator galvanic isolator - CORRECT ANSWERblocks bad DC currents only at the source of power - CORRECT ANSWERthe neutral and ground should be connected BASED ON ABYC STANDARDS, A 1,000 WATT 120VAC WATER HEATER, WHOSE SUPPLY CABLE HAS 105C THERMAL RATING, IS RUN OUTSIDE OF THE ENGINE ROOM AND IS NOT BUNDLED WITH ANY OTHER CONDUCTORS. WHAT MINIMUM SIZE WIRE GAUGE WILL BE REQUIRED TO SERVICE THIS CIRCUIT? - CORRECT ANSWER-16 gauge WHICH OF THE FOLLOWING COMPONENTS DOES NOT REQUIRE OVERCURRENT PROTECTION? - CORRECT ANSWER-STARTER MOTOR UNDERSIZED WIRE, LOOSE CONNECTIONS AND CORROSION 1. THE MINIMUM AMP CIRCUIT BREAKER THAT SHOULD BE USED TO PROTECT A 120V WATER HEATER CIRCUIT WITH A 1600-WATT ELEMENT WOULD BE RATED AT AMPS - 1. WHEN TESTING FOR EXCESSIVE EMF EMISSION NEAR A CONDUCTOR OR APPLIANCE, THE TOOL OF CHOICE IS ANI: - CORRECT ANSWER-GAUSS METER 1. FROM THE ELECTRICAL DIAGRAM SYMBOLS SHOWN BELOW, SELECT THE SYMBOL THAT ILLUSTRATES A VARIABLE RESISTOR: - CORRECT ANSWER-variable resistor 1. THE PRIMARY PROBLEM WITH USING A SERIES CIRCUIT TO SUPPLY MULTIPLE LOADS IS THAT: - CORRECT ANSWER-VOLTAGE DROP THROUGH THE CIRCUIT WILL BE EXCESSIVE 1. BASED ON THIS SECTION, THE MOST COMMON ELECTRICAL CIRCUIT PROBLEM IN MARINE APPLICATIONS IS: - CORR. (R-UNWANTED OPEN 1. THE PRIMARY BY-PRODUCT OF EXCESSIVE ELECTRICAL RESISTANCE IS: - ‘HEAT 1. ONE HORSEPOWER EQUALS - CORRE ‘ ANSWER-746 WATTS 1. HOW MANY OHMS ARE USED TO LIMIT A CURRENT TO 1.2 AMP WITH 0.240 KV? - (DR), 240 = (1.2) (R), R= 240/1.2) 1. AN ELECTRIC WATER HEATER THAT USES A 1000 WATT 120 VAC ELEMENT REQUIRE A MINIMUM OVERCURRENT PROTECTION RATING OF - CORRECT WHEN MEASURING FOR EXCESSIVE VOLTAGE DROP AT A SWITCH DEVICE, A HIGH VOLTAGE READING INDICATES - CORR. ISWER-PAULTY SWITCH / EXCESSIVE RESISTANCE 1. ALL OF THE FOLLOWING COULD CAUSE A CONDUCTOR TO OVERHEAT EXCEPT - CORRECT ANSWER-INSULATION TEMPERATURE RATING TOO LOW 1. PARALLELING BATTERIES INCREASES - CORR’ CAPACITY CT ANSWER-AMP/HR, CCA, AND 1. A TECHNICIAN HAS INSTALLED A SPOTLIGHT RATED TO DRAW 14 AMPS AT 12 VDC. THE DISTANCE BETWEEN DC PANEL BOARD AND SPOTLIGHT IS 24’. WHAT WOULD BE THE PROPER WIRE GAUGE SIZE BASED ON ABYC E-11 STANDARD? - ‘CT ANSWER10 GAUGE (REFER TO VOLTAGE DROP TABLE AT P. 32-33) 1. ACCORDING TO ABYC, ACCEPTABLE MINIMUM CLEARANCE FOR ROUTING WIRE NEAR A DRY EXHAUST SECTION IS - ¢ ‘R-G INCHES 1. THE MAXIMUM NUMBER OF TERMINALS ALLOWED TO BE ATTACHED TO ANY ONE TERMINAL STUD BASED ON ABYC STANDARDS IS: - CORRECT ANSWER-4 1. HOW MUCH CURRENT SHOULD FLOW THROUGH THE DC GROUNDING CONDUCTOR VERO AMPS 1. CONDUCTORS #8 AWG AND LARGER SHALL BE PERMITTED TO BE CONNECTED IN PARALLEL - CORRECT ANSWER-WHERE THE AMPACITY OF EACH INDIVIDUAL CONDUCTOR IS SUFFICIENT TO CARRY THE ENTIRE LOAD CURRENT SHARED BY THE PARALLEL CONDUCTORS 1. A TECHNICIAN IS INSTALLING THE CABLE RUN FROM THE BATTERIES TO THE MAIN DC PANELBOARD ON A BOAT AS PART OF A REFIT. THE BOAT HAS A 12-VOLT SYSTEM, AND THE DISTANCE FROM THE PANEL TO THE BATTERIES IS 15FT (APPROXIMATELY 3 M). THE MAXIMUM CURRENT DRAW FROM THE PANEL IS CALCULATED AT 90 AMPS. WHAT GAUGE CABLE SHOULD BE USED AT A MINIMUM FROM THE PANEL TO THE BATT 15 FT DISTANCE FROM THE BATTERY TO THE PANEL 15FT, T=30FT) 1. DC GROUNDED CONDUCTORS ON NEW BOATS THAT ARE ALSO EQUIPPED WITH AC SYSTEMS SHOULD USE INSULATION - CORRECT ANSWER-YELLOW 1. ACCORDING WITH THE RECOMMENDATION FROM STANDARD E-11 THE WIRING COLOR CODE FOR "DC NEGATIVE CONDUCTOR" IS: - CORRECT ANSWER-BLACK OR YELLOW 1. THE MAXIMUM SPACING FOR CABLE RUN SUPPORT BASED ON ABYC IS: - ¢18 IN. (430 MM) 1. THE SMALLEST GAUGE CABLE ALLOWED FOR UNSHEATED WIRE RUNS THROUGH THE BOAT IS: - CORRECT ANSWER-16 AWG 1. TO DETERMINE CONDUCTOR SIZE AND TEMPERATURE RATING, YOU SHOULD FOLLOW - CO. ANSWER-E-11 STANDARDS 1. FRICTION CONNECTORS ARE REQUIRED TO PASS A MINIMUM ___ PULL 1. WHICH OF THE FOLLOWING IS THE BEST AVAILABLE LOCATION IN WHICH TO SUPPORT CURRENT CARRYING CONDUCTORS? - CORRECT ANSWER-BULKHEAD OR STRINGER. 1. ALL OF THE FOLLOWING ARE AREAS THAT WOULD REQUIRE CHAFE PROTECTION EXCEPT - CORREC ER-BILGE 1. THE BONDING CONDUCTORS ARE NORMALLY - CORRECT ANSWER-NONCURRENT CARRYING CONDUCTORS 1. WHAT TYPE OF ELECTRICITY IS NORMALLY DRAINED THROUGH THE AC GROUNDING WIRE?- CORRECT ANSWER-STATIC ELECTRICITY 1. SOME BATTERY MANUFACTURES WILL ONLY CONSIDER REPLACEMENT ON BATTERIES WHOSE CONDITIONS HAS BEEN DETERMINED BY USE OF A?- ANSWER-CONDUCTANCE TESTER 1. TECH A SAYS THAT SEALED BATTERIES CAN BE MOUNTED ANYWHERE IN THE BOAT WHERE SPACE CAN BE FOUND. TECH B SAYS THAT CONSIDERATIONS SHOULD BE GIVEN TO VENTILATION AND THE MOUNTING SURFACES AND THE SURROUNDING AREA NEAR THE BATTERY, AND THEIR RESISTANCE TO ACID ATTACK. WHICH TECHNICIAN IS CORRECT? - CORRECT ANSWER-TECH B 1. MINIMUM BATTERY RESERVE CAPACITY ALLOWED BASED ON ABYC STANDARD IS?- CORRECT ANSWER-S0 MINUTES 1. BASED ON ABYC STANDARDS, CABLE ATTACHMENTS TO BATTERIES WITH WING- TYPE NUTS ARE ALLOWED AS LONG AS THE WIRE GAUGE DOES NOT EXCEED? - CORRECT ANSWERS AWG 1. TRADITIONAL BATTERY LOAD TESTING METHODS DICTATE THAT A LOAD EQUIVALENT TO. % OF THE BATTERY'S CCA RATING BE PLACED ON THE BATTERY? - CORRECT ANSWER-30% 1. What is the battery mixture? - | 65% water and 35% acid 1. In whal. pancl is localed the breaker Lo aclivale the batlery charger? - CORREC AC Panel NSWER-1.25-1.27 1. THE MOSTLIKELY CAUSE OF UNDERCHARGING ON A SINGLE BATTERY IN A SERIES/PARALLEL SOLENOID STARTING APPLICATIONS WOULD BE ANSWER-FAULTY NORMALLY CLOSED CONTACT 1. WHEN INSTALLING A BATTERY ISOLATOR OR COMBINER DEVICE ACR IN CONJUNCTION WITH A 100 AMP ALTERNATOR, THE ISOLATOR OR COMBINER SHOULD HAVE A MINIMUM RATING OF - CORRECT ANSWER-125 AMPS 1. ALL OF THE FOLLOWING ARE COMPONENTS THAT MAY BE FOUND IN SYSTEMS DESIGNED TO CHARGE MULTIPLE BATTERY BANKS EXCEPT - GALVANIC ISOLATORS 1. WHEN INSTALLING A BATTERY CHARGER, ALL THE FOLLOWING SHOULD BE CONSIDERED EXCEPT - C -DIRECTLY OVER THE BATTERIES 1. WHEN TESTING AN ALTERNATOR, THE MAXIMUM ALLOWABLE AC RIPPLE READING TO ENSURE MINIMAL RADIO FREQUENCY INTERFERENCE IS - CORRECT A 4AVAC 1. WHICH OF THE FOLLOWING WOULD BE THE TYPICAL READING OF A 12 VOLT CHARGING SYSTEM? - CORRECT ANSWER-12.6 TO 14.1 VOLTS 1. WHEN INSTALLING A WIND GENERATOR CHARGING SYSTEM, ALL OF THE FOLLOWING ARE IMPORTANT INSTALLATION CONSIDERATION EXCEPT - CORRECT ANSWER-WIND DIRECTION INDICATOR LIF A12-VOLT BATTERY IS BECOMING OVERCHARGED, THE FAULT IS MOST LIKELY IN THE: - CORRECT ANSWER-ALTERNATOR REGULATOR 1. WHAT TYPE OF LOAD IS TYPICALLY NOT CONNECTED TO THE INVERTER AC OUTPUT? - CORRECT ANSWER MICROWAVE OVEN 2. FOR INVERTER INSTALLATION, IT IS IMPORTANT TO DO ALL OF THE FOLLOWING EXCEPT - CORRECT ANSWER-USE LARGE CRANKING BATTERIES 3. IT IS RECOMMENDED THAT INVERTERS BE INSTALLED - CORRECT ANSWER- NEAR THE BATTERIES 4, THE TOOL OF CHOICE FOR DETERMINING AN INVERTER’S LEVEL OF EMIIS THE: - 3. A TRUE - RMS VOLTMETER IS REQUIRED TO ACCURATELY CHECK - CORRECT ANSWERNONSINUSOIDAL INVERTER AC OUTPUT §. IN WHAT PANEL (AC OR DC) IS LOCATED THE BREAKER TO ACTIVATE THE INVERTER - CORRECT ANSWER-IN A SEPARATE SWITCH OR BREAKER 7. WHEN INSTALLING AN INVERTER IN A SPLIT BUS APPLICATION, IT IS IMPORTANT TO PROVIDE? - CORRECT ANSWER-AN ISOLATED HOT BUS AND AN ISOLATED NEUTRAL BUS 8. THE BEST FUSE TYPE TO USE FOR THE DC FEED TO AN INVERTER IS? ANSWERCLASS T 9. ON AN INVERTER THAT DOES NOT PROVIDE A TRUE SINE WAVE OUTPUT, LOW VOLTAGE TROUBLESHOOTING MUST BE ACCOMPLISHED USING A(N) -TYPE DVOM? - CORRECT ANSWER-TRUE RMS 10. AS PART OF AN INVERTER INSTALLATION, A BATTERY SWITCH IS REQUIRED IF THE DC POWER SOURCE HAS A CUMULATIVE CCA RATING OF__ OR MORE. - CORRECT ANSWER-801 11. THE TOOL OF CHOICE FOR DETERMINING AN INVERTER’S LEVEL OF EMI IS?- GAUSS METER 2. WHEN MORE THAN ONE SHORE POWER INLET IS INSTALLED, ABYC RECOMMENDS THAT THE NEUTRALS ARE - CORRECT. WERNOT CONNECTED TOGETHER 3. WHAT IS THE MAXIMUM ALLOWED OVERCURRENT PROTECTION RATING IN THE SECONDARY CIRCUIT OF AN ISOLATION TRANSFORMER? - CORRECT ANSWER-125% 4. WHICH OF THE FOLLOWING DEVICES ARE PERMITED TO BE INSTALLED IN THE AC GROUNDING CONDUCTOR CIRCUIT? - CORRECT ANSWER-GALVANIC ISOLATOR 13. TECH A SAYS THAT THE “ACR AND THE “GALVANIC ISOLATOR" HAVE THE SAME FUNCTION. TECH B SAYS THAT THE GALVANIC ISOLATOR IS A MORE SOPHISTICATED ACR. WHO IS RIGHT> - CORRECT ANSWER-NEITHER 14. THE SHORE-POWER GROUNDED CONDUCTOR SHOULD? - BE GROUNDED ON BOARD THE BOAT 15. IF ACUSTOMER COMPLAINS ABOUT RECEIVING SHOCKS FROM HIS/HER BOAT WHEN THE BOAT IS PLUGGED INTO SHORE POWER; THE FIRST TEST SHOULD BE? - CORRECT ANSWER-POLARITY CHECK OF THE SHORE CORD 16. IF A CUSTOMER COMPLAINS OF LOW VOLTAGE AT THE AC PANEL, THE TECHNICIAN SHOULD FIRST? - CHECK THE VOLTAGE AT THE DOCK PEDESTAL 17. ACUSTOMER COMPLAINS ABOUT A REVERSE POLARITY PROBLEM. IS NOT ALIKELY CAUSE. - -AN OPEN NEUTRAL 18. IN AGALVANIC ISOLATOR INSTALLATION, WHICH OF THE FOLLOWING COULD CAUSE A LOSS OF GALVANIC ISOLATION? - CORRECT ANSWER-A SHORTED ISOLATOR DIODE, IMPROPER CURRENT RATING OF THE ISOLATOR, AN ONBOARD NEUTRAL-TO-GROUND CONNECTION 19. TECH A SAYS THAT A GENERATOR’S NEUTRAL AND GROUND MUST BE TIED TOGETHER WHEN THE GENERATOR IS SUPPLYING AC POWER. TECH B SAYS THEY MUST ALWAYS BE KEPT ISOLATED. WHICH TECHNICIAN IS CORRECT? - T ANSWER-TECH A 20. A "DROOPED NEUTRAL" CONDUCTOR IN A 240/120V SHORE POWER SYSTEM WILL MOST LIKELY SHOW UP AS? - CORRECT ANSWER-BURNED OUT 120V APPLIANCES -CONDUCTOR WITH AN EXCESSIVELY HIGH INSULATION TEMPERATURE A The proper sequence for connecting shore power to the boat is? - CORRECT ANSWER-Connect to the boat’s service entrance, connect to the dockside outlet, tum on the dockside outlet, turn on the boat's AC main cirenil. broaker 22. In dual shore power cord applicalions using a single isolator, the current rating of the galvanic isolator hall not be less than the sum of the ratings of the main shore power 1. A POSSIBLE CAUSE OF CORRECT NO LOAD VOLTAGE WITH A LOSS OF VOLTAGE AT FULL LOAD ON A BRUSHLESS GENERATOR COULD BE: - SHORTED DIODE IN EXCITER ROTOR 2. ACCORDING TO ABYC, UNDER WHICH OF THE FOLLOWING CONDITIONS MAY A GENERATOR SET WITHOUT IGNITION PROTECTED COMPONENTS BE INSTALL IN A COMPARTMENT CONTAINING A GASOLINE PROPULSION ENGINE? - CORRECT ANSWERINDER NO CONDITION IS THIS PERMITTED 3. WITH THE GENERATOR RUNNING AND AC OUTPUT YIELDING LOW FREQUENCY, WHAT IS A PROBABLY CAUSE? - CORRECT ANSWER-LOW ENGINE SPEED 4. INCREASING THE GENERATOR OUTPUT LOAD SHOULD HAVE WHAT EFFECT ON THE ROTOR FIELD VOLTAGE? R-INCREASE THE VOLTAGE 12. DURING A SECOND FOR A 60 HZ GENERATOR. HOW MANY TIMES IS THE POLARITY SWITCHED? - ¢ 60 TIMES 13. TECH A SAYS THAT AT THE CONTROL BOX OF THE GENERATOR THE FUSE(S) IS/ARE DEDICATED TO VERIFY PROBLEMS WITH THE HARNESS AND CRANKING SYSTEM OF THE ENGINE. TECH B SAYS THAT NORMALLY THOSE FUSES ARE TO INDICATE AN UNDER VOLTAGE FAULT (UV). WHO IS RIGHT? - CORRECT ANSWER- TECH A 14. DURING THE MEGGOHMETER TEST PROCEDURE ON A GENERATOR. THE GENERATOR SHOULD BE - CORRECT ANSWER-STOP WITH OUTPUT PHASES ISOLATED 1a. AS PART OF THE GENERATOR INSTALLATION THE FUEL SELENOID AND THE FUEL TRANSFER PUMP, SHOULD BE POWERED - CORRECT ANSWER-ALL THE TIME WHILE THE GENERATOR IS RUNNING 16. FOR A DOUBLE PHASE TRANSFORMER (120/240. THREE WIRES). THE OUTPUT OF THE TRANSFORMER SHALL BE PROTECTED WITH AN OVERCURRENT PROTECTION - CORRECT ANSWER-NOT MORE THAN 125% OF THE RATED SECONDARY CURRENT 17. TECH A SAYS THAT AN OUTPUT VOLTAGE OF 100V FROM THE GENERATOR, COULD BE ADJUSTED ON THE VOLTAGE REGULATOR AT THE SPOT "VOLT". TECH B SAYS THAT AN OUTPUT VOLTAGE OF 100 V FROM THE GENERATOR, COULD BE ADJUSTED IN THE GOVERNOR. WHO IS RIGHT? - CORRECT ANSWER-TECH A 18. DURING A SECOND FOR A 30 HZ GENERATOR. HOW MANY CYCLES ARE INCLUDE IN THAT PERIOD OF TIME? - CORRECT ANSWER-30 CYCLES 19. THE COSTUMER COMPLAINS THAT THE GENERATOR SPENT MORE THAN 15 SEC TO RECOVER THE MAXIMUM RPM’'S WHEN THE LOAD IS APPLIED. TECH A SAYS THAT THIS IS A PROBLEM THAT CAN BE SOLVE ADJUSTING THE "GAIN" ON THE VOLTAGE REGULATOR. TECH B SAYS THAT THE PROBLEM CAN BE SOLVED INCREASING THE RPM’S AT THE ENGINE GOVERNOR. WHO IS RIGHT? - CORRECT 20. IN MOST CASES PROBLEMS RELATED WITH “LOW FREQUENCY (LF)" OBEY TO - CORRECT ANSWER-PUEL SYSTEM ISSUES 21. WHEN THE ENGINE IS RUNNING AT LOWER RPM THE INTENSITY OF THE LIGHTS DECREASE ANS INCREASE WHEN THE ENGINE RPM RAISE. TECH A SAYS THAT THIS IS LOW EXCITATION VOLTAGE ISSUE. TECHNICIAN B SAYS THAT THIS IS A POOR CONTACT BETWEEN THE BRUSHES AND SLIP RINGS. WHO IS RIGHT? - CORRECT ANSWER-BOTH (BOTH OF THEM ARE TALKING ABOUT EXCITATION) 22. A TRANSFORMER TRANSFER POWER FROM ONE CIRCUIT TO ANOTHER USING - CORRECT ANSWER-A MUTUAL INDUCTION 25,000 OHMS ABOVE GROUND 2. THE METALLIC ENCLOSURE OR PANEL FACE OF AN AC PANEL BOARD SHOULD BE DIRECTLY CONNECTED TO: - CORRECT ANSWER-AC GROUNDING BUS 3. THE CURRENT FLOWING THROUGH A 120V AC HEATING ELEMENT AT 1800 WATTS IS:- CORRECT ANSWER-15.0 AMP