Wiring and Installation Flashcards
(34 cards)
A wiring diagram of a complete circuit for a system is also known as a?
Schematic
What does a block diagram do?
Gives an overview of a system, but not enough detail for troubleshooting.
What is a pictorial diagram?
A block diagram with pictures. Might help to recognize components to an orientation on the aircraft.
What is a schematic diagram?
Provides enough information to understand the entire system. This would aid in trouble shooting.
What is the first step in trouble shooting?
Is to know how the system operates.
Can diagrams be used like schematics?
Yes wiring diagrams describe an entire circuit for a system.
Can detailed level wiring diagrams be used as schematics?
No
Can block diagrams by used as a schematics.
No they can help understand a system but are generally too symbolic to use for troubleshooting.
What are pictorial diagrams used for?
Generally for educational purposes.
Why are wires normally stranded?
So they can withstand vibration. It also makes it more flexible so that it can be installed more easily
Why is wire plated or coated?
It is plated or coated with a different metal to avoid the corrosion that would be a problem with pure copper wire.
Why are different metals used?
It determines the temperature that the wire can withstand.
What is a shielded wire?
It is enclosed in a braided metal jacket. EMR is trapped by the braid and is carried to ground.
What is a coaxial cable?
It consists of a central conductor, inner insulator, braided metal outer conductor, and an outer insulation.
What is coaxial cable used for?
To connect a radio with its antenna. There is also triaxial and quadraxial cable.
Why are wires put into bundles?
To facilitate installation.
What are the restrictions on aluminum wires?
-Must be 8-gauge or larger.
-Not installed in areas of sever vibration.
-Not installed where frequent connections required.
-Not to be used where the length is less than 3ft.
-Not to be used in areas where corrosive fumes exist.
-Not recommended for use in communications or navigation systems.
Do you get to pick the wire?
No you find out what you are supposed to use.
SWAMP
Severe Wind and Moisture Problems.
Will you be soldering wires?
No wires are always spliced using crimped connectors.
What can affect the wire size?
Strands, insulation, and shielding
How are wires identified?
The number on the wire may indicate the system it is part of, the wire number in that system, the segment of the wire, the size and whether it is a ground wire.
What are the circumstances for installing twisted wire?
-In the vicinity of magnetic compass or flux valve.
-Three-phase distribution wiring.
-Certain other wires (usually radio wiring) as specified on engineering drawings.
Why don’t you solder joints?
They are usually stiff, and vibration can harden the wire and cause it to break.
