ABYC ELECTRICAL STUDY 1
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
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? - 10 GAUGE (REFER TO VOLTAGE DROP TABLE AT P. 32-33)
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 TO
MAINTAIN STANDARDS COMPLIANCE? - 0 AWG (DISTANCE FROM THE PANEL TO THE BATT 15 FT
DISTANCE FROM THE BATTERY TO THE PANEL 15FT, T=30FT)
1. A VOLTAGE REGULATOR CONTROLS? - ALTERNATOR FIELD VOLTAGE
1. ACCORDING TO ABYC WHAT MATERIAL IS RECOMMENDED FOR CLAMPING CONDUCTORS OVER
ENGINES OR ANY TYPE OF MOVING MACHINERY - METAL
1. ACCORDING TO ABYC, ACCEPTABLE MINIMUM CLEARANCE FOR ROUTING WIRE NEAR A DRY EXHAUST
SECTION IS - 9 INCHES
1. ACCORDING WITH THE RECOMMENDATION FROM STANDARD E-11 THE WIRING COLOR CODE FOR
"DC NEGATIVE CONDUCTOR" IS: - BLACK OR YELLOW
1. ALL OF THE FOLLOWING ARE AREAS THAT WOULD REQUIRE CHAFE PROTECTION EXCEPT - BILGE
1. ALL OF THE FOLLOWING ARE COMPONENTS THAT MAY BE FOUND IN SYSTEMS DESIGNED TO CHARGE
MULTIPLE BATTERY BANKS EXCEPT - GALVANIC ISOLATORS
,1. ALL OF THE FOLLOWING COULD CAUSE A CONDUCTOR TO OVERHEAT EXCEPT - INSULATION
TEMPERATURE RATING TOO LOW
1. AN ELECTRIC WATER HEATER THAT USES A 1000 WATT 120 VAC ELEMENT REQUIRE A MINIMUM
OVERCURRENT PROTECTION RATING OF - 10 AMPS
1. BASED ON ABYC STANDARDS, CABLE ATTACHMENTS TO BATTERIES WITH WING-TYPE NUTS ARE
ALLOWED AS LONG AS THE WIRE GAUGE DOES NOT EXCEED? - 8 AWG
1. BASED ON THIS SECTION, THE MOST COMMON ELECTRICAL CIRCUIT PROBLEM IN MARINE
APPLICATIONS IS: - UNWANTED OPEN
1. BASED ON WHAT THIS SECTION HAS TOLD YOU, THE TOOL OF CHOICE TODAY FOR TRACING SHORTED
AND OPEN CIRCUITS IS THE: - TDR
1. CONDUCTORS #8 AWG AND LARGER SHALL BE PERMITTED TO BE CONNECTED IN PARALLEL - WHERE
THE AMPACITY OF EACH INDIVIDUAL CONDUCTOR IS SUFFICIENT TO CARRY THE ENTIRE LOAD CURRENT
SHARED BY THE PARALLEL CONDUCTORS
1. DC GROUNDED CONDUCTORS ON NEW BOATS THAT ARE ALSO EQUIPPED WITH AC SYSTEMS SHOULD
USE __________ INSULATION - YELLOW
1. EXCESSIVE ELECTRICAL RESISTANCE CAN BE CAUSED BY: - UNDERSIZED WIRE, LOOSE CONNECTIONS
AND CORROSION
1. FOR THE SAME LENGTH OF WIRE, A 12- GAUGE WIRE WILL SAFELY CARRY MORE_________ THAN A
16 GAUGE WIRE - AMPERAGE
1. FRICTION CONNECTORS ARE REQUIRED TO PASS A MINIMUM ___________ PULL TEST ACCORDING
TO ABYC E-11. - 6 POUNDS
,1. FROM THE ELECTRICAL DIAGRAM SYMBOLS SHOWN BELOW, SELECT THE SYMBOL THAT ILLUSTRATES
A VARIABLE RESISTOR: - variable resistor
1. HOW MANY OHMS ARE USED TO LIMIT A CURRENT TO 1.2 AMP WITH 0.240 KV? - 200 OHMS
(V=(I)(R), 240 = (1.2) (R), R= 240/1.2)
1. HOW MUCH CURRENT SHOULD FLOW THROUGH THE DC GROUNDING CONDUCTOR IN A 25-AMP DC
MOTOR CIRCUIT? - 0 AMPS
1. IF A 12-VOLT BATTERY IS BECOMING OVERCHARGED, THE FAULT IS MOST LIKELY IN THE: -
ALTERNATOR REGULATOR
1. In what panel is located the breaker to activate the battery charger? - AC Panel
1. MINIMUM BATTERY RESERVE CAPACITY ALLOWED BASED ON ABYC STANDARD IS? - 90 MINUTES
1. ON A BATTERY WHERE A HYDROMETER CAN BE USED, A CELL CAN BE USED, A CELL READING OF 0.050
POINTS OF SPECIFIC GRAVITY BELOW ALL OF THE OTHER CELLS IN THE BATTERY MAY INDICATE? - A BAD
CELL AND BATTERY REPLACEMENT NEEDED
1. ONE HORSEPOWER EQUALS________ - 746 WATTS
1. PARALLELING BATTERIES INCREASES - AMP/HR, CCA, AND CAPACITY
1. SHEATHED, UNDERGROUNDED CONDUCTORS CONNECTED DIRECTLY TO A BATTERY MUST HAVE
OVERCURRENT PROTECTION DEVICES LOCATED WITHIN ____ OF CONNECTION TO THE BATTERY? - 72
INCHES
1. SOME BATTERY MANUFACTURES WILL ONLY CONSIDER REPLACEMENT ON BATTERIES WHOSE
CONDITIONS HAS BEEN DETERMINED BY USE OF A? - CONDUCTANCE TESTER
, 1. TECH A SAYS THAT AC AND DC ARE ABLE TO RUN TOGETHER DOWN THE SAME CONDUCTOR. TECH B
SAYS THIS IS TECHNICALLY IMPOSSIBLE. WHICH TECHNICIAN IS CORRECT? - TECH A
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? - TECH B
1. TECH A SAYS THAT THREE BATTERIES OF 12V AND 60 AMP EACH ONE, CONNECTED IN SERIES HAVE
THE SAME OUTPUT POWER THAN THE SAME THREE BATTERIES CONNECTED IN PARALLEL. TECH B SAYS
THAT THIS CONCEPT JUST APPLY FOR BANKS OF TWO BATTERIES. WHO IS RIGHT? - TECH A ( P=36 * 60 =
2160, P= 12 * 180= 2160)
1. TECH A SAYS THAT VOLTAGE SUPPLIED TO THE ROTOR CONTROLS ALTERNATOR OUT-PUT VOLTAGE.
TECH B SAYS THAT THE ALTERNATOR OUTPUT IS PROPORTIONAL TO ROTOR VOLTAGE. WHICH
TECHNICIAN IS CORRECT? - BOTH TECHS
1. TECH A SAYS WHEN THE WATER MUST BE ADDED TO A BATTERY FREQUENTLY, IT MAY BE DUE TO
OVERCHARGING. TECH B SAYS A BULGING BATTERY CASE IS CAUSED BY OVERCHARGING. WHICH TECH
IS CORRECT? - BOTH
1. TECH A SAYS WHEN THE WATER MUST BE ADDED TO A BATTERY FREQUENTLY, IT MAY BE DUE TO
OVERCHARGING. TECH B SAYS A BULGING BATTERY CASE IS CAUSED BY OVERCHARGING. WHICH TECH
IS CORRECT? - BOTH
1. THE BOAT'S AC NEUTRAL BUS SHOULD BE: - GREATER THAN 25,000 OHMS ABOVE GROUND
1. THE BONDING CONDUCTORS ARE NORMALLY - NONCURRENT CARRYING CONDUCTORS
1. THE MAXIMUM NUMBER OF TERMINALS ALLOWED TO BE ATTACHED TO ANY ONE TERMINAL STUD
BASED ON ABYC STANDARDS IS: - 4
1. THE MAXIMUM SPACING FOR CABLE RUN SUPPORT BASED ON ABYC IS: - 18 IN. (450 MM)
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
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? - 10 GAUGE (REFER TO VOLTAGE DROP TABLE AT P. 32-33)
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 TO
MAINTAIN STANDARDS COMPLIANCE? - 0 AWG (DISTANCE FROM THE PANEL TO THE BATT 15 FT
DISTANCE FROM THE BATTERY TO THE PANEL 15FT, T=30FT)
1. A VOLTAGE REGULATOR CONTROLS? - ALTERNATOR FIELD VOLTAGE
1. ACCORDING TO ABYC WHAT MATERIAL IS RECOMMENDED FOR CLAMPING CONDUCTORS OVER
ENGINES OR ANY TYPE OF MOVING MACHINERY - METAL
1. ACCORDING TO ABYC, ACCEPTABLE MINIMUM CLEARANCE FOR ROUTING WIRE NEAR A DRY EXHAUST
SECTION IS - 9 INCHES
1. ACCORDING WITH THE RECOMMENDATION FROM STANDARD E-11 THE WIRING COLOR CODE FOR
"DC NEGATIVE CONDUCTOR" IS: - BLACK OR YELLOW
1. ALL OF THE FOLLOWING ARE AREAS THAT WOULD REQUIRE CHAFE PROTECTION EXCEPT - BILGE
1. ALL OF THE FOLLOWING ARE COMPONENTS THAT MAY BE FOUND IN SYSTEMS DESIGNED TO CHARGE
MULTIPLE BATTERY BANKS EXCEPT - GALVANIC ISOLATORS
,1. ALL OF THE FOLLOWING COULD CAUSE A CONDUCTOR TO OVERHEAT EXCEPT - INSULATION
TEMPERATURE RATING TOO LOW
1. AN ELECTRIC WATER HEATER THAT USES A 1000 WATT 120 VAC ELEMENT REQUIRE A MINIMUM
OVERCURRENT PROTECTION RATING OF - 10 AMPS
1. BASED ON ABYC STANDARDS, CABLE ATTACHMENTS TO BATTERIES WITH WING-TYPE NUTS ARE
ALLOWED AS LONG AS THE WIRE GAUGE DOES NOT EXCEED? - 8 AWG
1. BASED ON THIS SECTION, THE MOST COMMON ELECTRICAL CIRCUIT PROBLEM IN MARINE
APPLICATIONS IS: - UNWANTED OPEN
1. BASED ON WHAT THIS SECTION HAS TOLD YOU, THE TOOL OF CHOICE TODAY FOR TRACING SHORTED
AND OPEN CIRCUITS IS THE: - TDR
1. CONDUCTORS #8 AWG AND LARGER SHALL BE PERMITTED TO BE CONNECTED IN PARALLEL - WHERE
THE AMPACITY OF EACH INDIVIDUAL CONDUCTOR IS SUFFICIENT TO CARRY THE ENTIRE LOAD CURRENT
SHARED BY THE PARALLEL CONDUCTORS
1. DC GROUNDED CONDUCTORS ON NEW BOATS THAT ARE ALSO EQUIPPED WITH AC SYSTEMS SHOULD
USE __________ INSULATION - YELLOW
1. EXCESSIVE ELECTRICAL RESISTANCE CAN BE CAUSED BY: - UNDERSIZED WIRE, LOOSE CONNECTIONS
AND CORROSION
1. FOR THE SAME LENGTH OF WIRE, A 12- GAUGE WIRE WILL SAFELY CARRY MORE_________ THAN A
16 GAUGE WIRE - AMPERAGE
1. FRICTION CONNECTORS ARE REQUIRED TO PASS A MINIMUM ___________ PULL TEST ACCORDING
TO ABYC E-11. - 6 POUNDS
,1. FROM THE ELECTRICAL DIAGRAM SYMBOLS SHOWN BELOW, SELECT THE SYMBOL THAT ILLUSTRATES
A VARIABLE RESISTOR: - variable resistor
1. HOW MANY OHMS ARE USED TO LIMIT A CURRENT TO 1.2 AMP WITH 0.240 KV? - 200 OHMS
(V=(I)(R), 240 = (1.2) (R), R= 240/1.2)
1. HOW MUCH CURRENT SHOULD FLOW THROUGH THE DC GROUNDING CONDUCTOR IN A 25-AMP DC
MOTOR CIRCUIT? - 0 AMPS
1. IF A 12-VOLT BATTERY IS BECOMING OVERCHARGED, THE FAULT IS MOST LIKELY IN THE: -
ALTERNATOR REGULATOR
1. In what panel is located the breaker to activate the battery charger? - AC Panel
1. MINIMUM BATTERY RESERVE CAPACITY ALLOWED BASED ON ABYC STANDARD IS? - 90 MINUTES
1. ON A BATTERY WHERE A HYDROMETER CAN BE USED, A CELL CAN BE USED, A CELL READING OF 0.050
POINTS OF SPECIFIC GRAVITY BELOW ALL OF THE OTHER CELLS IN THE BATTERY MAY INDICATE? - A BAD
CELL AND BATTERY REPLACEMENT NEEDED
1. ONE HORSEPOWER EQUALS________ - 746 WATTS
1. PARALLELING BATTERIES INCREASES - AMP/HR, CCA, AND CAPACITY
1. SHEATHED, UNDERGROUNDED CONDUCTORS CONNECTED DIRECTLY TO A BATTERY MUST HAVE
OVERCURRENT PROTECTION DEVICES LOCATED WITHIN ____ OF CONNECTION TO THE BATTERY? - 72
INCHES
1. SOME BATTERY MANUFACTURES WILL ONLY CONSIDER REPLACEMENT ON BATTERIES WHOSE
CONDITIONS HAS BEEN DETERMINED BY USE OF A? - CONDUCTANCE TESTER
, 1. TECH A SAYS THAT AC AND DC ARE ABLE TO RUN TOGETHER DOWN THE SAME CONDUCTOR. TECH B
SAYS THIS IS TECHNICALLY IMPOSSIBLE. WHICH TECHNICIAN IS CORRECT? - TECH A
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? - TECH B
1. TECH A SAYS THAT THREE BATTERIES OF 12V AND 60 AMP EACH ONE, CONNECTED IN SERIES HAVE
THE SAME OUTPUT POWER THAN THE SAME THREE BATTERIES CONNECTED IN PARALLEL. TECH B SAYS
THAT THIS CONCEPT JUST APPLY FOR BANKS OF TWO BATTERIES. WHO IS RIGHT? - TECH A ( P=36 * 60 =
2160, P= 12 * 180= 2160)
1. TECH A SAYS THAT VOLTAGE SUPPLIED TO THE ROTOR CONTROLS ALTERNATOR OUT-PUT VOLTAGE.
TECH B SAYS THAT THE ALTERNATOR OUTPUT IS PROPORTIONAL TO ROTOR VOLTAGE. WHICH
TECHNICIAN IS CORRECT? - BOTH TECHS
1. TECH A SAYS WHEN THE WATER MUST BE ADDED TO A BATTERY FREQUENTLY, IT MAY BE DUE TO
OVERCHARGING. TECH B SAYS A BULGING BATTERY CASE IS CAUSED BY OVERCHARGING. WHICH TECH
IS CORRECT? - BOTH
1. TECH A SAYS WHEN THE WATER MUST BE ADDED TO A BATTERY FREQUENTLY, IT MAY BE DUE TO
OVERCHARGING. TECH B SAYS A BULGING BATTERY CASE IS CAUSED BY OVERCHARGING. WHICH TECH
IS CORRECT? - BOTH
1. THE BOAT'S AC NEUTRAL BUS SHOULD BE: - GREATER THAN 25,000 OHMS ABOVE GROUND
1. THE BONDING CONDUCTORS ARE NORMALLY - NONCURRENT CARRYING CONDUCTORS
1. THE MAXIMUM NUMBER OF TERMINALS ALLOWED TO BE ATTACHED TO ANY ONE TERMINAL STUD
BASED ON ABYC STANDARDS IS: - 4
1. THE MAXIMUM SPACING FOR CABLE RUN SUPPORT BASED ON ABYC IS: - 18 IN. (450 MM)
