NCATT AET AEIT ENDORSEMENT MIDTERM EXAM
QUESTIONS WITH VERIFIED ANSWERS
/. Electromagnetic Interference (5.5.5.5) - Answer-caused when electromagnetic fields
(radio waves) induce high-frequency voltages in a wire or component. (AC 43.13-1B 11-
89)
.Grounding (5.5.5.5) - Answer-Establishing a physical wire path that gives electricity a
path to earth/ground.
.Bonding (5.5.5.5) - Answer-Connection of non-current carrying conductive elements ie.
enclosures and structures.
.Conductor plating (5.5.5.1) - Answer-Copper wire plated with Tin, Silver, or Nickel. Tin
is the most common. wire plating has a slower oxidation rate than bare copper.
.Voltage drop in wires (5.5.5.1) - Answer-Should not exceed 2% of the regulated voltage
when the generator is carrying rated current or the battery is being discharged at 5
minute rate.
.The allowable voltage drop in a 28 volt continuous circuit is:
a. 1 volt
b. 2 volts
c. 5 volts
d. 4 volts - Answer-a. 1 volt
.Voltage rating (5.5.5.1) - Answer-The voltage rating of a cable is the highest voltage
that may be continuously applied to a completed cable construction in compliance with
the relevant cable standard or specification
.Shielded wire (5.5.5.1) - Answer-Electrical wire that is enclosed in a braided metal
jacket. Electromagnetic energy radiated from the wire is trapped by the braid and is
carried to ground.
.Receiving Inspection (5.4.1.1) - Answer-ensure that incoming parts are checked
against purchase orders, manufacturers specifications, drawings and dimensions and
other available documentation to CONFIRM AUTHENTICITY of the material.
Conformance to applicable technical standards will be verified. Incoming material must
be separated from previously inspected material
.cable (5.5.5.1) - Answer-A bundle of wires covered by rubber or plastic along which an
electric current can pass.
, .New Equipment Acceptance (5.4.1) - Answer-Receiving inspection, physical condition,
inventory of equipment and accessories for installation
.Visual inspections (5.4.1.2) - Answer-New parts will be visually inspected to confirm the
PN and SN, the part markings, and general condition. All parts/components must be
accompanied by documents the CLEARY INDICATE APPROVED/ACCEPTABLE
SOURCE.
.Suspected Unapproved Parts (SUP) - Answer-Red Tagged - Placed in quarantine -
report using FAA Form 8120-11. Ref. AC 21-29.
.Direct Marking (5.5.5.3) 1 - Answer-Several different methods can be used to mark
directly on the wire: hot stamp marking, ink jet printers, and laser jet printers. The hot
stamp method can damage the insulation of a newer type of wire that utilizes thin
insulators.
.Indirect Marking (5.5.5.3) 2 - Answer-Identification sleeves can be used if direct
marking on the wire is not possible. Indirectly-marked wire or cable should be identified
with printed sleeves at each end and at intervals not longer than 6 feet. The individual
wires inside a cable should be identified within 3 inches of their termination
.Wire Identification (5.5.5.3) - Answer-All wire used on aircraft must have its type
identification imprinted along its length. It is common practice to follow this part number
with the five digit/letter Commercial and Government Entity (CAGE) code identifying the
wire manufacturer. You can identify the performance capabilities of existing installed
wire you need to replace, and avoid the inadvertent use of a lower performance and
unsuitable replacement wire.
.Wire Identification Requirements (5.5.5.3) - Answer-Identification markings should be
placed at each end of the wire and at 15-inch maximum intervals along the length of the
wire. Wires less than 3 inches in length need not be identified. Wires 3 to 7 inches in
length should be identified approximately at the center. Added identification marker
sleeves should be located so that ties, clamps, or supporting devices need not be
removed to read the identification. The wire identification code must be printed to read
horizontally from left to right) or vertically (from top to bottom)
.Performance Standards - Technical Standard Order TSO (5.3.6.3) - Answer-Minimum
performance standard for specified materials, parts and appliances used on civil aircraft.
TSO authorization IS NOT an approval to install in aircraft, only authorization to
manufacture part or material.
.Performance Standards - Parts Manufacturer Approval PMA (5.3.6.3) - Answer-PMA
production approval allows you to produce and sell FAA approved aircraft articles that
are eligible for installation on FAA Type Certificated Products.
QUESTIONS WITH VERIFIED ANSWERS
/. Electromagnetic Interference (5.5.5.5) - Answer-caused when electromagnetic fields
(radio waves) induce high-frequency voltages in a wire or component. (AC 43.13-1B 11-
89)
.Grounding (5.5.5.5) - Answer-Establishing a physical wire path that gives electricity a
path to earth/ground.
.Bonding (5.5.5.5) - Answer-Connection of non-current carrying conductive elements ie.
enclosures and structures.
.Conductor plating (5.5.5.1) - Answer-Copper wire plated with Tin, Silver, or Nickel. Tin
is the most common. wire plating has a slower oxidation rate than bare copper.
.Voltage drop in wires (5.5.5.1) - Answer-Should not exceed 2% of the regulated voltage
when the generator is carrying rated current or the battery is being discharged at 5
minute rate.
.The allowable voltage drop in a 28 volt continuous circuit is:
a. 1 volt
b. 2 volts
c. 5 volts
d. 4 volts - Answer-a. 1 volt
.Voltage rating (5.5.5.1) - Answer-The voltage rating of a cable is the highest voltage
that may be continuously applied to a completed cable construction in compliance with
the relevant cable standard or specification
.Shielded wire (5.5.5.1) - Answer-Electrical wire that is enclosed in a braided metal
jacket. Electromagnetic energy radiated from the wire is trapped by the braid and is
carried to ground.
.Receiving Inspection (5.4.1.1) - Answer-ensure that incoming parts are checked
against purchase orders, manufacturers specifications, drawings and dimensions and
other available documentation to CONFIRM AUTHENTICITY of the material.
Conformance to applicable technical standards will be verified. Incoming material must
be separated from previously inspected material
.cable (5.5.5.1) - Answer-A bundle of wires covered by rubber or plastic along which an
electric current can pass.
, .New Equipment Acceptance (5.4.1) - Answer-Receiving inspection, physical condition,
inventory of equipment and accessories for installation
.Visual inspections (5.4.1.2) - Answer-New parts will be visually inspected to confirm the
PN and SN, the part markings, and general condition. All parts/components must be
accompanied by documents the CLEARY INDICATE APPROVED/ACCEPTABLE
SOURCE.
.Suspected Unapproved Parts (SUP) - Answer-Red Tagged - Placed in quarantine -
report using FAA Form 8120-11. Ref. AC 21-29.
.Direct Marking (5.5.5.3) 1 - Answer-Several different methods can be used to mark
directly on the wire: hot stamp marking, ink jet printers, and laser jet printers. The hot
stamp method can damage the insulation of a newer type of wire that utilizes thin
insulators.
.Indirect Marking (5.5.5.3) 2 - Answer-Identification sleeves can be used if direct
marking on the wire is not possible. Indirectly-marked wire or cable should be identified
with printed sleeves at each end and at intervals not longer than 6 feet. The individual
wires inside a cable should be identified within 3 inches of their termination
.Wire Identification (5.5.5.3) - Answer-All wire used on aircraft must have its type
identification imprinted along its length. It is common practice to follow this part number
with the five digit/letter Commercial and Government Entity (CAGE) code identifying the
wire manufacturer. You can identify the performance capabilities of existing installed
wire you need to replace, and avoid the inadvertent use of a lower performance and
unsuitable replacement wire.
.Wire Identification Requirements (5.5.5.3) - Answer-Identification markings should be
placed at each end of the wire and at 15-inch maximum intervals along the length of the
wire. Wires less than 3 inches in length need not be identified. Wires 3 to 7 inches in
length should be identified approximately at the center. Added identification marker
sleeves should be located so that ties, clamps, or supporting devices need not be
removed to read the identification. The wire identification code must be printed to read
horizontally from left to right) or vertically (from top to bottom)
.Performance Standards - Technical Standard Order TSO (5.3.6.3) - Answer-Minimum
performance standard for specified materials, parts and appliances used on civil aircraft.
TSO authorization IS NOT an approval to install in aircraft, only authorization to
manufacture part or material.
.Performance Standards - Parts Manufacturer Approval PMA (5.3.6.3) - Answer-PMA
production approval allows you to produce and sell FAA approved aircraft articles that
are eligible for installation on FAA Type Certificated Products.
