IYRS Electrical ABYC Exam UPDATED
Questions and CORRECT Answers
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 - CORRECT ANSWER - 15
When testing for excessive EMF emission near a conductor or appliance, the tool of choice is a -
CORRECT ANSWER - Gauss Meter
The primary problem with using a series circuit to supply multiple loads is that - CORRECT
ANSWER - voltage drop across each load will be excessive
the most common electrical circuit problem in marine applications is - CORRECT
ANSWER - unwanted open
the primary by-product of excessive electrical resistance is - CORRECT ANSWER - heat
the tool of choice today for tracing shorted and open circuits is the: - CORRECT
ANSWER - TDR
What material is recommended for clamping conductors over engines and moving machinery
according to the ABYC - CORRECT ANSWER - Metal
according to ABYC acceptable minimum clearance for routing wire near a dry exhaust section is
- CORRECT ANSWER - 9 inches (225 mm)
The maximum number of terminals allowed to be attached to any one terminal stud based on
ABYC is - CORRECT ANSWER -4
How much current should flow through the
, DC grounding conductor in a 25-amp DC motor circuit - CORRECT ANSWER - 0 amps
conductors of #10 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
A technician is installing the cable run from the batteries to the main DC panelboard on a boat
aspart of a refit. The boat has a 12-volt system, and the distance from the panel to the batteries is
15 ft (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? -
CORRECT ANSWER - 0 AWG
8. DC grounded conductors on new boats that are also equipped with AC systems should use
_________ insulation. - CORRECT ANSWER - yellow
the maximum spacing for cable run support based on ABYC is - CORRECT ANSWER -
16 inches (400 mm)
the smallest gauge cable allowed for unsheathed wire runs through the boat is - CORRECT
ANSWER - 16 AWG
The maximum sustained charging voltage acceptable to some gel cell battery manufacturers is -
CORRECT ANSWER - 14.1
Sheathed, ungrounded conductors connected directly to a battery must have overcurrent
protection devices located within _______ of connection to the battery - CORRECT
ANSWER - 40 Inches
on a battery where a hydrometer can be used, a cell reading of 0.050 points of a specific gravity
below all of the other cells in the battery may indicate - CORRECT ANSWER - A bad cell
and battery replacement needed
Questions and CORRECT Answers
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 - CORRECT ANSWER - 15
When testing for excessive EMF emission near a conductor or appliance, the tool of choice is a -
CORRECT ANSWER - Gauss Meter
The primary problem with using a series circuit to supply multiple loads is that - CORRECT
ANSWER - voltage drop across each load will be excessive
the most common electrical circuit problem in marine applications is - CORRECT
ANSWER - unwanted open
the primary by-product of excessive electrical resistance is - CORRECT ANSWER - heat
the tool of choice today for tracing shorted and open circuits is the: - CORRECT
ANSWER - TDR
What material is recommended for clamping conductors over engines and moving machinery
according to the ABYC - CORRECT ANSWER - Metal
according to ABYC acceptable minimum clearance for routing wire near a dry exhaust section is
- CORRECT ANSWER - 9 inches (225 mm)
The maximum number of terminals allowed to be attached to any one terminal stud based on
ABYC is - CORRECT ANSWER -4
How much current should flow through the
, DC grounding conductor in a 25-amp DC motor circuit - CORRECT ANSWER - 0 amps
conductors of #10 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
A technician is installing the cable run from the batteries to the main DC panelboard on a boat
aspart of a refit. The boat has a 12-volt system, and the distance from the panel to the batteries is
15 ft (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? -
CORRECT ANSWER - 0 AWG
8. DC grounded conductors on new boats that are also equipped with AC systems should use
_________ insulation. - CORRECT ANSWER - yellow
the maximum spacing for cable run support based on ABYC is - CORRECT ANSWER -
16 inches (400 mm)
the smallest gauge cable allowed for unsheathed wire runs through the boat is - CORRECT
ANSWER - 16 AWG
The maximum sustained charging voltage acceptable to some gel cell battery manufacturers is -
CORRECT ANSWER - 14.1
Sheathed, ungrounded conductors connected directly to a battery must have overcurrent
protection devices located within _______ of connection to the battery - CORRECT
ANSWER - 40 Inches
on a battery where a hydrometer can be used, a cell reading of 0.050 points of a specific gravity
below all of the other cells in the battery may indicate - CORRECT ANSWER - A bad cell
and battery replacement needed
