Aircraft Avionics System Review part 1 Flashcards
Mounting two communications on an aircraft, how should they be placed in relation to each other?
Top and bottom of fuselage
What is the purpose of a feedback signal in an autopilot system?
to adjust the aircraft’s position accurately
or
To provide position feedback and return the control surface to neutral.
GPS is used only for long distance over water navigation?
False
ADF receiver will utilize two antennas, a loop and a sense antenna?
True
Which segment of the GPS system monitors satellite timing and position signal and transmits a correcting signal to correct a deviation on satellite if necessary?
Control Segment
An Amplifier
Increase the strength of a signal
Automatic Directional Finder (ADF) is a system that will tell the pilot the position of the aircraft on a radio from an AM broadcast station?
False
Antenna Length is usually:
¼ & ½
A DME system is always used in conjunction with VOR will tell you the distance from the VOR?
True
A transfinder aids ATC in identifying aircraft on a radar?
True
What are the mechanics responsibilities with aircraft radio systems?
Inspection and installation of radios and antennas only
COAX Cable is referred to as a balanced transmission line?
False
Skywave:
Moves in straight lines and bounces of the ionosphere
What aircraft avionics system uses SHF?
Weather Radar
When is an Emergency Landing Transmission (ELT) operational check performed?
Within 5 mins after the hour
The VOR Receiver is primarily a?
Navigation
A radio Altimeter sends altitude info to the transponder which relays to ATC?
True
The weather Radar should not be turned on while on the ground unless special precautions are taken?
True
Which part of the ILS tells distance to the runaway?
Marker Beacon
Ground Waves
Follows the curvature of the earth
What is a de-modular?
Separate Audio frequency from carrier wave
A Stormscope system is a low cost severe weather transmission for aircraft that utilizes echo transmission to detect?
True
If you increase frequency, the wavelength will?
Decrease
What does the Distance Measuring Equipment (DME) do?
Gives Slant distance to VOR Station
ADF uses loop antenna to sense radio signal direction?
True
VHF cover the frequency range from?
30 to 300 Mhz
What is modulation?
Alterating the form of carrier waves
What is the minimum clearance between the sea bottom of a fully deflected sea and the radio installed beneath it?
1”
Purpose of Doppler plate in an antenna installation?
To provide extra security for a rigid antenna
When should the ELT battery be replaced?
As indicated by
A BALUN Transformer is used to couple an unbalanced transmission line to a balanced antenna?
True
A modulator:
Superimposed signal into carrier wave signal
Installation Landing System (ILS) is used for?
Landing aircraft in poor visibility or low ceiling
