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ABYC Advanced Pretest
"Statement A: Switching between AC power sources can be done with seamless
transfer. Statement B: Switching between AC power sources can apply the break-
before-make method." - ANSWER ✔ Statements A and B are both True
32.8.1 Electrical interlocking shall be provided for ________in installations that are not
capable of seamless transfer or parallel operations and to prevent a single bus from
being energized by more than one non-synchronized AC power source simultaneously.
- ANSWER ✔ switching devices
A boat's hull potential is measured: - ANSWER ✔ Between a reference cell and main
engine negative
A boat's hull potential is measured: - ANSWER ✔ Between a reference cell and the
engine negative terminal or its bus.
A metallic shore power inlet becomes hot to the touch. Which would not be a
contributing factor? - ANSWER ✔ Temperature rating of shore-cord insulation
A semiconductor - ANSWER ✔ exhibits properties directly between those of conductors
and insulators
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A true-DC wind generator might be inadvertently powered by the batteries if a ________
is not part of the installation. - ANSWER ✔ Blocking diode
A-28 -APPENDIX 2 -ELECTRICAL TEST PROCEDURES FOR GALVANIC CURRENT
BLOCKING The galvanic isolator shall be connected in series with a variable DC power
supply as shown below. The supply shall be capable of adjusting the voltage output in
fine increments in establishing the exact barrier voltage or intrinsic junction voltage.
Once the device is biased into conduction, measurements shall be taken of the resultant
current. The ammeter shall have a resolution of at least+/- _milliampere. The voltmeter
shall have a resolution of at least +/-1 millivolt. The connection diagram is shown below
(see A-28.12.3.1 through A-28.12.3.3). - ANSWER ✔ 1
A-28 -APPENDIX 4 - LOADTEST ()))%) vs. TEMPERATURE Thermocouples shall be
placed in critical locations on the isolator body and its internal components. The isolator
shall be mounted as intended on a 1/2-inch piece of plywood. The unit shall be placed
in series with an AC power supply, ammeter, and load resistor.as shown. The power
supply shall be adjusted to allow ___% of rated current to be conducted through the
isolator. The current shall be maintained until temperatures stabilize. The galvanic
isolator shall be designed so that no exterior surface exceeds 90°C (194°F). (See
sections A-28.12.7.1 through A-28.12.7.4.) All data shall be recorded using a digital
temperature and computerized data logger. The ammeter shall have a resolution of at
least +/- 1 mA. For galvanic isolators that are not intended for installation in machinery
areas or ignition protected areas, the thermocoupled sample shall be preconditioned -
ANSWER ✔ 135
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A-28 -APPENDIX 4 - LOADTEST (135%) vs. TEMPERATURE Thermocouples shall be
placed in critical locations on the isolator body and its internal components. The isolator
shall be mounted as intended on a _-inch piece of plywood. The unit shall be placed in
series with an AC power supply, ammeter, and load resistor.as shown. The power
supply shall be adjusted to allow 135% of rated current to be conducted through the
isolator. The current shall be maintained until temperatures stabilize. The galvanic
isolator shall be designed so that no exterior surface exceeds 90°C (194°F). (See
sections A-28.12.7.1 through A-28.12.7.4.) All data shall be recorded using a digital
temperature and computerized data logger. The ammeter shall have a resolution of at
least +/- 1 mA. For galvanic isolators that are not intended for installation in machinery
areas or ignition protected areas, the thermocoupled sample shall be preconditioned fo -
ANSWER ✔ 1/2
A-28 -APPENDIX 4 - LOADTEST (135%) vs. TEMPERATURE Thermocouples shall be
placed in critical locations on the isolator body and its internal components. The isolator
shall be mounted as intended on a 1/2-inch piece of plywood. The unit shall be placed
in series with an AC power supply, ammeter, and load resistor.as shown. The power
supply shall be adjusted to allow 135% of rated current to be conducted through the
isolator. The current shall be maintained until temperatures stabilize. The galvanic
isolator shall be designed so that no exterior surface exceeds _____. (See sections A-
28.12.7.1 through A-28.12.7.4.) All data shall be recorded using a digital temperature
and computerized data logger. The ammeter shall have a resolution of at least +/- 1 mA.
For galvanic isolators that are not intended for installation in machinery areas or ignition
protected areas, the thermocoupled sample shall be preconditioned for 2 h - ANSWER
✔ 90°C (194°F)
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A-28 -APPENDIX 4 - LOADTEST (135%) vs. TEMPERATURE Thermocouples shall be
placed in critical locations on the isolator body and its internal components. The isolator
shall be mounted as intended on a 1/2-inch piece of plywood. The unit shall be placed
in series with an AC power supply, ammeter, and load resistor.as shown. The power
supply shall be adjusted to allow 135% of rated current to be conducted through the
isolator. The current shall be maintained until temperatures stabilize. The galvanic
isolator shall be designed so that no exterior surface exceeds 90°C (194°F). (See
sections A-28.12.7.1 through A-28.12.7.4.) All data shall be recorded using a digital
temperature and computerized data logger. The ammeter shall have a resolution of at
least +/- 1 mA. For galvanic isolators that are not intended for installation in machinery
areas or ignition protected areas, the thermocoupled sample shall be preconditioned -
ANSWER ✔ 2
A-28 -APPENDIX 4 - LOADTEST (135%) vs. TEMPERATURE Thermocouples shall be
placed in critical locations on the isolator body and its internal components. The isolator
shall be mounted as intended on a 1/2-inch piece of plywood. The unit shall be placed
in series with an AC power supply, ammeter, and load resistor.as shown. The power
supply shall be adjusted to allow 135% of rated current to be conducted through the
isolator. The current shall be maintained until temperatures stabilize. The galvanic
isolator shall be designed so that no exterior surface exceeds 90°C (194°F). (See
sections A-28.12.7.1 through A-28.12.7.4.) All data shall be recorded using a digital
temperature and computerized data logger. The ammeter shall have a resolution of at
least +/-_ mA. For galvanic isolators that are not intended for installation in machinery
areas or ignition protected areas, the thermocoupled sample shall be preconditioned f -
ANSWER ✔ 1
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ABYC Advanced Pretest
"Statement A: Switching between AC power sources can be done with seamless
transfer. Statement B: Switching between AC power sources can apply the break-
before-make method." - ANSWER ✔ Statements A and B are both True
32.8.1 Electrical interlocking shall be provided for ________in installations that are not
capable of seamless transfer or parallel operations and to prevent a single bus from
being energized by more than one non-synchronized AC power source simultaneously.
- ANSWER ✔ switching devices
A boat's hull potential is measured: - ANSWER ✔ Between a reference cell and main
engine negative
A boat's hull potential is measured: - ANSWER ✔ Between a reference cell and the
engine negative terminal or its bus.
A metallic shore power inlet becomes hot to the touch. Which would not be a
contributing factor? - ANSWER ✔ Temperature rating of shore-cord insulation
A semiconductor - ANSWER ✔ exhibits properties directly between those of conductors
and insulators
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A true-DC wind generator might be inadvertently powered by the batteries if a ________
is not part of the installation. - ANSWER ✔ Blocking diode
A-28 -APPENDIX 2 -ELECTRICAL TEST PROCEDURES FOR GALVANIC CURRENT
BLOCKING The galvanic isolator shall be connected in series with a variable DC power
supply as shown below. The supply shall be capable of adjusting the voltage output in
fine increments in establishing the exact barrier voltage or intrinsic junction voltage.
Once the device is biased into conduction, measurements shall be taken of the resultant
current. The ammeter shall have a resolution of at least+/- _milliampere. The voltmeter
shall have a resolution of at least +/-1 millivolt. The connection diagram is shown below
(see A-28.12.3.1 through A-28.12.3.3). - ANSWER ✔ 1
A-28 -APPENDIX 4 - LOADTEST ()))%) vs. TEMPERATURE Thermocouples shall be
placed in critical locations on the isolator body and its internal components. The isolator
shall be mounted as intended on a 1/2-inch piece of plywood. The unit shall be placed
in series with an AC power supply, ammeter, and load resistor.as shown. The power
supply shall be adjusted to allow ___% of rated current to be conducted through the
isolator. The current shall be maintained until temperatures stabilize. The galvanic
isolator shall be designed so that no exterior surface exceeds 90°C (194°F). (See
sections A-28.12.7.1 through A-28.12.7.4.) All data shall be recorded using a digital
temperature and computerized data logger. The ammeter shall have a resolution of at
least +/- 1 mA. For galvanic isolators that are not intended for installation in machinery
areas or ignition protected areas, the thermocoupled sample shall be preconditioned -
ANSWER ✔ 135
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A-28 -APPENDIX 4 - LOADTEST (135%) vs. TEMPERATURE Thermocouples shall be
placed in critical locations on the isolator body and its internal components. The isolator
shall be mounted as intended on a _-inch piece of plywood. The unit shall be placed in
series with an AC power supply, ammeter, and load resistor.as shown. The power
supply shall be adjusted to allow 135% of rated current to be conducted through the
isolator. The current shall be maintained until temperatures stabilize. The galvanic
isolator shall be designed so that no exterior surface exceeds 90°C (194°F). (See
sections A-28.12.7.1 through A-28.12.7.4.) All data shall be recorded using a digital
temperature and computerized data logger. The ammeter shall have a resolution of at
least +/- 1 mA. For galvanic isolators that are not intended for installation in machinery
areas or ignition protected areas, the thermocoupled sample shall be preconditioned fo -
ANSWER ✔ 1/2
A-28 -APPENDIX 4 - LOADTEST (135%) vs. TEMPERATURE Thermocouples shall be
placed in critical locations on the isolator body and its internal components. The isolator
shall be mounted as intended on a 1/2-inch piece of plywood. The unit shall be placed
in series with an AC power supply, ammeter, and load resistor.as shown. The power
supply shall be adjusted to allow 135% of rated current to be conducted through the
isolator. The current shall be maintained until temperatures stabilize. The galvanic
isolator shall be designed so that no exterior surface exceeds _____. (See sections A-
28.12.7.1 through A-28.12.7.4.) All data shall be recorded using a digital temperature
and computerized data logger. The ammeter shall have a resolution of at least +/- 1 mA.
For galvanic isolators that are not intended for installation in machinery areas or ignition
protected areas, the thermocoupled sample shall be preconditioned for 2 h - ANSWER
✔ 90°C (194°F)
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A-28 -APPENDIX 4 - LOADTEST (135%) vs. TEMPERATURE Thermocouples shall be
placed in critical locations on the isolator body and its internal components. The isolator
shall be mounted as intended on a 1/2-inch piece of plywood. The unit shall be placed
in series with an AC power supply, ammeter, and load resistor.as shown. The power
supply shall be adjusted to allow 135% of rated current to be conducted through the
isolator. The current shall be maintained until temperatures stabilize. The galvanic
isolator shall be designed so that no exterior surface exceeds 90°C (194°F). (See
sections A-28.12.7.1 through A-28.12.7.4.) All data shall be recorded using a digital
temperature and computerized data logger. The ammeter shall have a resolution of at
least +/- 1 mA. For galvanic isolators that are not intended for installation in machinery
areas or ignition protected areas, the thermocoupled sample shall be preconditioned -
ANSWER ✔ 2
A-28 -APPENDIX 4 - LOADTEST (135%) vs. TEMPERATURE Thermocouples shall be
placed in critical locations on the isolator body and its internal components. The isolator
shall be mounted as intended on a 1/2-inch piece of plywood. The unit shall be placed
in series with an AC power supply, ammeter, and load resistor.as shown. The power
supply shall be adjusted to allow 135% of rated current to be conducted through the
isolator. The current shall be maintained until temperatures stabilize. The galvanic
isolator shall be designed so that no exterior surface exceeds 90°C (194°F). (See
sections A-28.12.7.1 through A-28.12.7.4.) All data shall be recorded using a digital
temperature and computerized data logger. The ammeter shall have a resolution of at
least +/-_ mA. For galvanic isolators that are not intended for installation in machinery
areas or ignition protected areas, the thermocoupled sample shall be preconditioned f -
ANSWER ✔ 1
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