ATO test 3 Exam Questions and
Answers
Circuit function - -Indicated with an equipment identification code or a circuit
function letter.
- Aircraft wire identification codes - -To standardize the identification of
aircraft wiring.
- Equipment identification code - -The portion of nomenclature following the
/ but excluding the hyphen and suffix letters
- Equipment identification code is used to identify the following: - -Radio
Radar
Special electronics
Armament special equipment
- Unit number - -Used where two or more identical items of equipment are
installed in the same aircraft
- Wire number - -Used to differentiate between wires in a circuit
- Wire segment letter - -Used to differentiate between conductor segments
in a particular circuit
- Wire size number - -Identifies the size (gauge) of the wire or cable
- Ground - -Letter N is used to identify the phase of wire completing a circuit
to the ground network of the aircraft electrical system
- Phase - -A letter used to identify the phase of wire in the three phase
power distribution wiring of aircraft systems. A B C and T1 T2 T3
- Thermocouple letter - -Used to identify the thermocouple material
- Circuit protection devices - -Fuses and circuit breakers are used to prevent
damage to circuits and components from excessive current
- Current rating - -Indicates the maximum current a circuit protection device
can carry indefinitely without removing power from the circuit. Normal circuit
rated 125 percent. Range from 0.002 to 600 amperes
- Voltage rating - -Indicates the highest voltage the circuit protection device
can remove power from the circuit without arcing, once opened
Answers
Circuit function - -Indicated with an equipment identification code or a circuit
function letter.
- Aircraft wire identification codes - -To standardize the identification of
aircraft wiring.
- Equipment identification code - -The portion of nomenclature following the
/ but excluding the hyphen and suffix letters
- Equipment identification code is used to identify the following: - -Radio
Radar
Special electronics
Armament special equipment
- Unit number - -Used where two or more identical items of equipment are
installed in the same aircraft
- Wire number - -Used to differentiate between wires in a circuit
- Wire segment letter - -Used to differentiate between conductor segments
in a particular circuit
- Wire size number - -Identifies the size (gauge) of the wire or cable
- Ground - -Letter N is used to identify the phase of wire completing a circuit
to the ground network of the aircraft electrical system
- Phase - -A letter used to identify the phase of wire in the three phase
power distribution wiring of aircraft systems. A B C and T1 T2 T3
- Thermocouple letter - -Used to identify the thermocouple material
- Circuit protection devices - -Fuses and circuit breakers are used to prevent
damage to circuits and components from excessive current
- Current rating - -Indicates the maximum current a circuit protection device
can carry indefinitely without removing power from the circuit. Normal circuit
rated 125 percent. Range from 0.002 to 600 amperes
- Voltage rating - -Indicates the highest voltage the circuit protection device
can remove power from the circuit without arcing, once opened
