ABYC MARINE ELECTRICAL UPDATED
COMPREHENSIVE EXAM QUESTIONS AND
ANSWERS SURE A+
✔✔b. The resistivity of copper - ✔✔In the formula for circular mils, for our purposes "K"
is equal to 10.75. What does this number represent?
a . The wire thickness
b. The resistivity of copper
c. The rating of the wire insulation
d. Black Magic
✔✔c. Insulation temperature rating too low - ✔✔All of the following could cause a
conductor to overheat except.
a. Undersize conductor
b. Excessive amperage
c. Insulation temperature rating too low
d. Corroded connection
✔✔d. 4 - ✔✔How many conductors may be attached to a single terminal stud?
a. 1
b. 2
c. 3
d. 4
✔✔d. 90 - ✔✔Each installed battery shall not move more than one inch in any direction
when pulling force of ______ lbs or twice battery weight is applied.
a. 60
b. 70
c. 80
d. 90
e. 100
,✔✔a. wire nuts - ✔✔Multi wire plugs and receptacles used in conjunction with harness
type wiring systems shall incorporate means except:
a. wire nuts
b. molded connectors
c. insulation grips
d. extended terminal barrels
e. all the above
✔✔c. remotely activated switches - ✔✔Solenoids are often used as:
a. resistors
b. capacitors
c. remotely activated switches
d. voltage regulating devices
✔✔b. 210 - ✔✔What is the allowable amps of a single #2 AWG conductor outside the
engine space, rated at 105 C?
a. 178.5
b. 210
c. 147
d. 126
✔✔c. Metal - ✔✔What material is recommended for clamping conductors over engines
and moving machinery according to ABYC
a. PVC
b. Nylon
c. Metal
d. Any of the above will work
✔✔d. All of the above - ✔✔When completing a job after a partial rewiring of a
customer's boat, the technician should:
a. Update the boat's wiring diagram
b. Test the operation of the system
c. Explain all of the changes to the owner
d. All of the above
✔✔b. 16 AWG - ✔✔Using the circular mills formula, what size wire would you need for a
green, 96 watt running light that is 16' away from the distribution panel in a 24 volt
vessel.
a. 18 AW G
b. 16 AWG
c. 14 AWG
d. 2/0 AWG
✔✔a. Technician A - ✔✔Tech A says AC & DC are able to run down the same
conductor. Tech B says this is technically impossible. Which is correct?
, a. Technician A
b. Technician B
c. Neither A nor B
d. Both A and B
✔✔b. 0 amps - ✔✔How much current should flow through the DC grounding conductor
in a 25 amp DC motor circuit.
a. 25 amps
b. 0 amps
c. 10 amps
d. 5 amps
✔✔b. 2" (E-11.14.4.1.6) - ✔✔The minimum space for conductor runs near water-cooled
enigine exhaust is
a. 1"
b. 2"
c. 4"
d. 9"
✔✔True - ✔✔T or F: if power disconnect switch is in excess of 10 feet, over-current
protection is required
✔✔b. Technician B - ✔✔Tech A says that combined AC/DC panels boards are
grounded via the DC negative bus. Tech B says that the panel board should be
grounded to the AC grounding bus. Which tech is correct?
a. Technician A
b. Technician B
c. Neither A nor B
d. Both A and B
✔✔d. All of the above are correct - ✔✔An electrical diode is a component that:
a. Is found in alternators
b. Is found in galvanic isolators
c. Is found in battery isolators
d. All of the above are correct
✔✔a. At both ends of the cable - ✔✔Voltage drop could be used to test for a bad starter
cable. To test the cable a technician would use the DVOM and check voltage at what
two points?
a. At both ends of the cable
b. The battery terminals
c. The positive cable at starter and engine block (ground)
d. At the starter solenoid and engine block (ground)
✔✔d. Current Flow - ✔✔An ampere is a measurement of:
COMPREHENSIVE EXAM QUESTIONS AND
ANSWERS SURE A+
✔✔b. The resistivity of copper - ✔✔In the formula for circular mils, for our purposes "K"
is equal to 10.75. What does this number represent?
a . The wire thickness
b. The resistivity of copper
c. The rating of the wire insulation
d. Black Magic
✔✔c. Insulation temperature rating too low - ✔✔All of the following could cause a
conductor to overheat except.
a. Undersize conductor
b. Excessive amperage
c. Insulation temperature rating too low
d. Corroded connection
✔✔d. 4 - ✔✔How many conductors may be attached to a single terminal stud?
a. 1
b. 2
c. 3
d. 4
✔✔d. 90 - ✔✔Each installed battery shall not move more than one inch in any direction
when pulling force of ______ lbs or twice battery weight is applied.
a. 60
b. 70
c. 80
d. 90
e. 100
,✔✔a. wire nuts - ✔✔Multi wire plugs and receptacles used in conjunction with harness
type wiring systems shall incorporate means except:
a. wire nuts
b. molded connectors
c. insulation grips
d. extended terminal barrels
e. all the above
✔✔c. remotely activated switches - ✔✔Solenoids are often used as:
a. resistors
b. capacitors
c. remotely activated switches
d. voltage regulating devices
✔✔b. 210 - ✔✔What is the allowable amps of a single #2 AWG conductor outside the
engine space, rated at 105 C?
a. 178.5
b. 210
c. 147
d. 126
✔✔c. Metal - ✔✔What material is recommended for clamping conductors over engines
and moving machinery according to ABYC
a. PVC
b. Nylon
c. Metal
d. Any of the above will work
✔✔d. All of the above - ✔✔When completing a job after a partial rewiring of a
customer's boat, the technician should:
a. Update the boat's wiring diagram
b. Test the operation of the system
c. Explain all of the changes to the owner
d. All of the above
✔✔b. 16 AWG - ✔✔Using the circular mills formula, what size wire would you need for a
green, 96 watt running light that is 16' away from the distribution panel in a 24 volt
vessel.
a. 18 AW G
b. 16 AWG
c. 14 AWG
d. 2/0 AWG
✔✔a. Technician A - ✔✔Tech A says AC & DC are able to run down the same
conductor. Tech B says this is technically impossible. Which is correct?
, a. Technician A
b. Technician B
c. Neither A nor B
d. Both A and B
✔✔b. 0 amps - ✔✔How much current should flow through the DC grounding conductor
in a 25 amp DC motor circuit.
a. 25 amps
b. 0 amps
c. 10 amps
d. 5 amps
✔✔b. 2" (E-11.14.4.1.6) - ✔✔The minimum space for conductor runs near water-cooled
enigine exhaust is
a. 1"
b. 2"
c. 4"
d. 9"
✔✔True - ✔✔T or F: if power disconnect switch is in excess of 10 feet, over-current
protection is required
✔✔b. Technician B - ✔✔Tech A says that combined AC/DC panels boards are
grounded via the DC negative bus. Tech B says that the panel board should be
grounded to the AC grounding bus. Which tech is correct?
a. Technician A
b. Technician B
c. Neither A nor B
d. Both A and B
✔✔d. All of the above are correct - ✔✔An electrical diode is a component that:
a. Is found in alternators
b. Is found in galvanic isolators
c. Is found in battery isolators
d. All of the above are correct
✔✔a. At both ends of the cable - ✔✔Voltage drop could be used to test for a bad starter
cable. To test the cable a technician would use the DVOM and check voltage at what
two points?
a. At both ends of the cable
b. The battery terminals
c. The positive cable at starter and engine block (ground)
d. At the starter solenoid and engine block (ground)
✔✔d. Current Flow - ✔✔An ampere is a measurement of:
