MOD 1 -2 Flashcards
Describe aircraft wire properties in detail
Stranded copper, tined with tin, silver or nickel, and insulated with Teflon
What does AWG stand for?
American wire gauge (AWG)
When the AWG number gets bigger the wire gets ______ and can carry less ______.
Smaller- Current
there are 3 standard colors and associated wire sizes of ring terminals and splices commonly use in aircraft wiring. List the 3 colors and the size of wire each one is made to be used on:
RED 22-16 AWG
Blue 16-14AWG
Yellow 12-10AWG
Most wire you will be using on aircraft will be between 24AWG and 10AWG, if you were to repair a broken wire on an aircraft system that was 20 AWG, what color splice would you use? ____, and how many broken strands are you allowed after you strip the wire? ____.
Red-None
______ and ______ are used as contacts inconnectors.
pins and sockets
Aircraft wire must be _____ to identify it in the circuit.
Marked
Ringing out a wire is used to test for ______
Continuty
Most aircraft wire is coated in ____ to prevent corrosion.
tin
____ terminals are crimped onto wire.
ring
In a wiring circuit, this is used as a remote switch
relay
Used to measure wire
circular mil
The _____ the wire gauge number, the ______it is.
Bigger - smaller
In a wiring install, a __________ is used for circuit protection.
Circuit Breaker
Solder Sleeves are used on _____ wire
shielded
Can be either solder or crimp type, this is connector in a wiring circuit.
Cannon plug
Type of knot used to secure a wire bundle.
clove hitch
An ______ load operates for less than 2 minutes.
intermittent
What are the two types of electricity we use ____and _____
AC and DC
What electronic instrument do we use to look at AC wave forms?
Oscilloscope
What is RMS?
Roots Mean Square
List one way we make AC on an aircraft
Generator, inverter
What frequency is the AC used in North America?
60hz
What is the frequency of the AC used on Aircraft?
400 hz
How do you convert Vpp to Vp?
Vp=1/2 Vpp
How do you convert Vp to VRMS?
Vrms= VpXsin45, or Vrms= Vpx.707
If I use my Digital Multimeter to measure AC voltage, what unit will it be in? A) Vpp B)Vp C)VRMS D) DC
C)VRMS
What is the relationship between RMS and DC Voltages?
Same average power in a resistive load
What are the two types of oscilloscopes?
Analog and digital
An oscilloscope will show you how long an AC cycle takes in time, how do you convert this to frequency?
Freq=1/period or f-1/T
On an Oscilloscope the UP/Down or Vertical scale gives us?
Voltage
On an oscilloscope the LEFT/RIGHT or Horizontal scale gives us?
time
When looking at a DC voltage on an oscilloscope it will show up as? A) Nothing scopes are for AC B) a flat line in the center C) A straight line 2 divisions up D) Depends on how the scope is set up
D) Depends on how the scope is set up
The most effective way to measure AC voltage.
RMS
One _____ is equal to 1 cycle per second.
HERTZ
Half of one cycle of alternating current.
Alternation
The Angular distance an AC voltage or current has moved from 0 degrees in a positive direction.
phase
Phase ______ representation is using a phaser diagram
domain
The most voltage is induced when _____ to the lines of flux.
perpendicular
Voltage = peak volatge x Sin Angle.
instantaneous
Measured in Hertz.
frequency
______ domain representation is used by an oscilloscope to show an AC wave form
time
