Navigation
What does ADF stand for?
Automatic Direction Finder
Page 816
Which type of antenna will be longer (VHF, UHF, HF)?
HF
What frequency range is typically used for long range communications?
HF
Aircraft antenna must be grounded to the?
Airframe.
Bus bar.
Wing spar.
Airframe
Prepware
Installed radio equipment is protected from damage due to jolts and vibrations by?
- Spring and/or viscous damper mounted racks.
- Shock mounts.
- Rubber or foam cushioning material between circuit chassis and case.
Shock Mounts
Prepware
What does VOR stand for and what does the system do?
Very High Frequency Omni-Directional Range
Used in line with the DME (Distance Measuring Equipment) for finding ground stations, it will provide a specific fix on where the aircraft is located.
If a co-ax cable is damaged what would be the proper procedure to fix the problem?
Replace the whole cable
What does FM stand for?
Frequency Modulation
The three critical characteristics of a radio antenna are?
1. ____________________
2. ____________________
3. ____________________
- Length
- Polarization
- Directivity
Page 807
In general, the purpose of an aircraft transponder is to?
Continually transmit heading, speed, and rate of climb/descent, etc., information to ATC.
Monitor aircraft speed, heading, altitude, and attitude whenever the autopilot system is engaged.
Receive an interrogation signal from a ground station and automatically send a reply back.
Receive an interrogation signal from a ground station and automatically send a reply back.
An ELT is is normally installed in the aircraft as far_______________ (aft or forward) as possible.
Aft
Page 812
How are VHF antennas polarized?
Vertically
What is the purpose of a radio transmitter?
Electrical Equipment used to generate electromagnetic waves carrying messages.
An ELT battery must be replaced when it has been installed for ________ percent of its rated re-usable life.
50 Percent
Page 812
What does “AM” stand for in radio communication signals?
Amplitude Modulation
The ADF (automatic direction finder) operates in the ________ and ________ bands.
Page 816
What powers an ELT during its operation?
Powered by its own battery pack
What is Line-of-Sight?
A direct free space path that exists between two points. Radio transmissions require a clear path between antennas.
If you are going to perform an old analog ELT test, you need to perform that test _________ minutes after every hour at the top of the hour.
5 minutes
Page 812
Radio Waves travel through space at a speed of ____________ miles per second, or _____________ meters per second.
186,000
300,000,000
Page 804
An ADF system requires two antenna. These are a/an __________________ and a/an ________________ antenna.
Loop, Sense
Page 816
What does VHF stand for?
Very High Frequency
Name the three different types of radio waves and give me a brief description of each one?
Sky waves: Bounces of the ionosphere and bounces back to earth
Surface Waves: Follows the curvature of the earth from one antenna to the other
Space Waves: Follows a strait line from the transmitting antenna to a receiving antenna
Operation of an analog ELT may be verified by tuning into ____________ MHz and activating the transmitter momentarily.
121.500 MHz
Page 812
The two fields that exist in radio antenna are the:
1. _______________
2. _______________
Magnetic
Electric
Page 802