EWIS
EWIS Knowledge Assessment
Test your knowledge on Electrical Wiring Interconnection Systems (EWIS) with our comprehensive quiz designed for professionals and students alike. Dive into topics covering standards, safety procedures, and cable management practices.
- Multiple choice questions
- Focus on practical applications
- Suitable for various levels of expertise
ESPM
Electrical Standard Practices Manual
Electronic Standard Practices Manual
Electrical Safety Practices Manual
SWPM
Standard Wiring Practices Manual
Standard Wiring Procedures Manual
Safety Wiring Procedures Manual
Refers to the health of the wire's insulation and is related to the various conditions that the wiring is exposed to rather than its age in years
Wire condition
Aging
Wire age
EWIS
Electronic Wiring Insulation System
Electrical Wiring Identification System
Electrical Wiring Interconnection System
Which of the following is lethal?
Voltage
Current
Resistance
What is used for cutting larger AWGs and coax wires?
Cutter/scalpel
Wire cutter
Wire stripper
Only one un-stripped wire is allowed per end cap
Close end splices
Spare wire caps
Wire caps
What color is used for wire marking?
Blue
Pink
White/Green
Crimped with insulator
Pre-insulated
Post-insulated
Insulated
Crimped with conductor only
Pre-insulated
Post-insulated
Insulated
It can be used as a measuring device for voltage, current, and resistance
Voltmeter
Electric tester
Multimeter
Used to check the quality of insulation
Insulation tester
Multimeter
Insulation meter
Shielded ARINC 429
Not grounded
Grounded both sides
Grounded on one side only
Shielded single/multi-conductor cable with signal below 50 kHz
Not grounded
Grounded both sides
Grounded on one side only
Used for sensitive wires/safety cables
Pink sleeve with black print
Pink sleeve
Pink sleeve with blue print
Is done to permanently and electrically conductively connect the equipment parts to one another. It also equalizes the potential difference of equipments
Grounding
Insulating
Bonding
Have the purpose to lead the feedback current into the structure
Grounding
Insulating
Bonding
Is required before component connections or plug connectors in order to avoid water penetration
Waterproof insulation
Drip-off loop
Sealing
Clamp connections must be
Overhead
Under
Level
The manual used for wire repairs
AMM
ESPM/SWPM
Aircraft Wiring Manual
Grade 0 repair
No repair is permitted
Temporary repair
Nor repair is necessary
Grade 1 repair
Permanent repair
Temporary repair
No repair is necessary
Grade 2 repair
Temporary repair
Check repair every C-check
Permanent repair
Grade 3 repair
Permanent repair
Replace
Temporary repair
Grade 4 repair
Replace
No repair is necessary
Permanent repair
How many splice repairs are allowed excluding splices made from manufacturing?
4
2
3
Consists of ASM, AWM, AWL
Wiring Diagram Manual
Wiring Schematic Manual
Wiring Manual List
ASM
Aircraft Safety Manual
Aircraft Schematic Manual
Aircraft Schematic Maintenance
AWM
Aircraft Wiring Manual
Aircraft Wiring Maintenance
Aircraft Wires Manual
AWL
Approved Wiring List
Aircraft Wiring Limitations
Aircraft Wiring List
Level 1 SSM
Block Diagram
Schematic
Simplified Schematic
Level 2 SSM
Schematic
Simplified Schematic
Block Diagram
Level 3 SSM
Simplified Schematic
Block Diagram
Schematic
SSM
Schematic System Manual
System Schematic Manual
Schematic Safety Manual
Provides broad overview of the system
Level 1
Level 2
Level 3
Provides a simplified view of the functions, components, interfaces
Level 1
Level 2
Level 3
Provides a detailed view of the functions, components, interfaces. Shows the system in sufficient depth for fault isolation to the LRU level
Level 1
Level 2
Level 3
Damage is <50% of wire diameter
Repair
Replace
Serviceable
Damage is >50% of wire diameter
Repair
Replace
Serviceable
A visual examination of an interior or exterior area, installation, or assembly to detect obvious damage, failure, or irregularity
General Visual Inspections
Detailed Inspection
Inspections
An intensive inspection of a specific item, installation, or assembly to detect damage, failure, or irregularity
Detailed Inspection
General Visual Inspection
Inspections
Haste makes waste
Pressure
Lack of awareness
Norms
3C's of communication
Clear, correct complete
Clear, concise, complete
Correct, complete, communicate
To avoid assuming that your message was understood, look for the
Answer
Feedback
Right words
Is an area where leakage of flammable fluids or flammable vapors can occur
Flammable leak zone
Flammable leakages zone
Flammable leakage zone
SWAMP Areas
Severe Weather and Moisture Prone Areas
Severe Weather and Moisture Possible Area
Severe Wear and Moisture Prone Areas
Could occur when there is a leak of water, acid, or leach
Wire chafing
Corrosion of wires
Wire degradation
Prevent electromagnetic fields from either entering of escaping from wires or cables
Insulating
Crimping
Shielding
Used for the transmission of high-frequency signals
Coaxial wires
Coaxial cables
Cables
The part numbers for wire identification are printed in
Black
White
Light or Dark Green
1st 4 numbers in Wiring Identification
No. Of cable in the circuit
No. Of circuit defined by ATA spec 100
Color code
2nd 4 numbers in Wiring Identification
No. Of cable in the circuit
No. Of circuit defined by ATA spec 100
Color code
1st letter in Wiring Identification
Color code
Safety or Sensitive Cable Code
Naming code
Letter S means
Safety or Sensitive Cable Code
Color Code
Safe
Are critical cables that can be related to any system and are installed in miscellaneous and sensitive routes
Coaxial cables
Sensitive cables
Safety cables
Higher number of AWG means
Lower current capacity
Thicker wires
High current capacity
The behavior which is the result of short circuits in wire harnesses in combination with fluids that can lead to a sudden burn off with the kind of insulation which can result in a complete failure of the wire harness
Carbon Arc Tracking/Insulation Flashover
Dry Carbon Arc Tracking
Wet Carbon Arc Tracking
Caused by short circuit, wire to wire or wire to ground resulting in a build up of carbon deposits on the conductors
Dry Carbon Arc Tracking
Wet Carbon Arc Tracking
Carbon Arc Tracking
Caused when a breakdown in the insulation is contaminated with fluid causing a short circuit wire to wire or wire to ground
Carbon Arc Tracking
Dry Carbon Arc Tracking
Wet Carbon Arc Tracking
When a repair of more than one wire in a wire harness is necessary, what is the minimum distance between the end of the splice on one wire and the opposite end of the adjacent wire?
0.25mm
0.25inch
0.025inch
If separation is prevented, what is the maximum separation of splices on both ends?
0.25inch
0.025inch
0.25mm
The splice kit consists of an inner crimp ferrule and an outer heatsink sealing sleeve, impregnated at the ends with sealant, which when heated provides a full environmental seal
Moisture proof splices
Sealed splices
Waterproof splices
Used to install the tie wraps
Long nose pliers
Wiring clamps
Wiring Tool (Gun)
Is a method to measure the conductivity of a wire
Conductivity measurement
Current measurement
Continuity measurement
This is usually a result of performing the task repeatedly
Norms
Complacency
Lack of Awareness
Are flame catalysts in case of fire
Dust and swarf
Fuel Vapor
Oxygen
The maximum number of wires combined to form one cable of an aircraft
3 wires
4 wires
5 wires
Are used mainly inside the pressurized cabin, and are only used outside of it if the clamp can withstand the environmental conditions occuring there
Nylon clamps
Connector seal
Ordinary clamps
Connectors have to be environmentally sealed in accordance with precise regulations. In most cases, not all contacts of a connector are used; thus the empty contact cavities require a seal plug or a seal rod
Nylon clamps
Connector plug
Connector seal
Most common method for attaching a shield ground wire to shielded cables
Solder sleeve pigtail
Pigtail
Soldering
Used to facilitate maintenance when frequent disconnection is required
Electrical connections
Electrical connectors
Electronic connectors
Gives the descriptive data and procedures for the electrical installations on all aircraft of the AIRBUS family
SWPM
EWIS
ESPM
Conditions that affect a human in the aviation maintenance work environment
Environmental Factors
Human Factors
Human Performance
Printed in light or dark green; exceptions are red, black or dark green wires; they are labeled with white numbers
Part Number
Wire Number
Wire Label
Wire Number example (BOEING)?
W4102 – 2001R – 24
2935 - 5938 - B - S
MIL - 2593 - G
How many times can a terminal be bent?
Once
Twice
Thrice
Normally installed on the hot side in order to minimize the risk of electric shock
Anti-shock contacts
Socket type contacts
Hot contacts
ESDS
Electromagnetic Discharge Sensitive Devices
Electronic Discharge Sensitive Devices
Electrostatic Discharge Sensitive Devices
This component is used for wires to stabilize and be protected against abrasion.
Bundle
Clamps
Fire resistant tape
In aircraft construction, what is an insulated braid?
Cable
Splice
Wire
Electrical equipment should never be operated in areas where explosive vapors are present or suspected, unless the equipment is?
Fire resistant
Explosion proof
Anti-static
Where can we see the wire info and wire part number for Airbus?
Aircraft Wiring Diagram
Aircraft Wiring List
Wiring Diagram Manual
Mechanical alternative to the solder sleeve pigtail
Crimped breakout sleeves
Nylon sleeves
Fire proof tape
Are fixed with harpoon tie, fairlead and retainer.
Cable Ducts
Wire bundles
Cables
Where are socket type contacts normally installed?
Cold side
Warm side
Hot side
Contacts are always inserted at the rear by means of a
Contact insertion tool
Special insertion tool
Special contact tool
Physical strength and mental ability are impaired
Stress
Fatigue
Lack of assertiveness
Appears on the airworthiness certificate and on the airplane's name plate, which is located in the upper door sill of the right forward door
Manufacturing Serial Number
Registration Number
Operator Code
What must be carried out after crimping operation is complete?
Detailed Inspection
Quality check
Visual inspection
Quality check: (check all 4)
Strands must ve visible
Continuity test
Pull test
Insulation crimp check
Dots must be present
Resistance check
Are mainly used for hot areas on the aircraft
Socket type contacts
Nylon clamp
Metal clamp
Color used for wire number or letter code imprint
Black
Green
White
Closed end splice breakout length limit
1 ½inches
2 inches
2 ½ inches
After crimping, the closed end splices may be placed
In any way possible
Side by side in an upright position within 30❰ of each other
On top of each other
Lateral movement of wires
Allowed
Not allowed
Refer to manual
Longitudinal movement of wires
Refer to manual
Not allowed
Allowed
Clockwise and counter clockwise movement of wires
Allowed
Refer to manual
Not allowed
Any repair under the clamp or cable is
Allowed
Not allowed
Refer to manual
Maximum wire harness diameter for nylon clamp
1.5 inches
1 inch
1.25 inches
Used for wire harness with more than 1.25 inches diameter
Metal clamp
Metal clamp with cushion
Nylon clamp
Phase A
Red
Yellow
Blue
Phase B
Blue
Red
Yellow
Phase C
Yellow
Blue
Red
Protects crew and passengers against electric shocks in the event of potential differences
Grounding
Bonding
Static discharging
In grounding, up to how many terminals are allowed per terminal bolt?
4
5
3
On what kind of structure is grounding not allowed?
Composite
Aluminum
Magnesium
Why is grounding not allowed on a magnesium structure?
Low conductivity
Corrosion
Low strength
Used for contact resistance measurement
Bonding meter
Ohmmeter
Multimeter
Installed on the live side
Pins
Socket type contacts
Receptacle
Considered as the moving part
Receptacle
Pins
Plug
It is usually fixed to the structure
Receptacle
Pins
Plug
General purpose connector with a solid, one-piece back shell
Class A
Class B
Class C
Back shell separates into two parts
Class C
Class K
Class B
Pressurized connector, con-removable inserts
Class K
Class C
Class A
Moisture and vibration resistant. Wires are threaded through tight-filling holes in the back shell sealing grommet
Class D
Class A
Class C
Fireproof connector
Class D
Class K
Class A
Class A, B, C, and D connectors are made of
Steel
Aluminum
Copper
Class K connectors are made of
Steel
Copper
Aluminum
Are connector seals with head
Seal rod
Headed seal
Seal plug
Are connector seals without a head
Seal rod
Ordinary plug
Seal plug
All connector contacts are inserted from the
Front
Rear
Side
Side used for insertion
Red
Black
White
Side used for extraction
Black
Red
White
Gage must pass freely between indentor tips
GO Gaging
Gaging
NO GO Gaging
Gage must not enter between indentor tips
GO Gaging
Gaging
NO GO Gaging
Used to crimp socket and pins
Crimping tool
Connector contact crimping tool
Connector crimping tool
If the connector with the Boeing Standard number is not available, any alternative connector will do
True
False
Refer to manual
Where can we perform wire repairs?
Pressurizes area
Non pressurized area
Both
Contacts with Rhodium, gold, or localized gold finishes are interchangeable and are applicable for all installation
True
False
Refer to manual
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