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29 Cards in this Set

  • Front
  • Back
What are the basic components of a radio communication system
1. a Microphone
2. transmitter
3. transmitting and receiving antennas
4. receiver
5. speakers or headphones
What frequency range is used by most modern voice communications systems
The VHF (very high frequency) band 118.0 to 136.975 MHz
What does the term ADF stand for
Automatic directions finder
What is the function of VOR equipment
Name the components of a typical airborne VOR navigation system
1. a receiver
2. antennas
3. frequency selector
4. visual display indicator
What does DME stand for
Distance measuring equipment
At what interval must An ATC transponder system be certified
Every 24 calendar months
Why are two antennas usually required for an ILS system
The localizer and glideslope signals are transmitted on different frequencies
What information does the glideslope beam provide
Vertical guidance to enable the aircraft to maintain the correct descent angle
What is the power source for an ELT (emergency locator transmitter)
An internal battery
Describe one method of monitoring the signal output during an ELT test
Tune a communications receiver to
121.5 MHz
How would you determine if the batteries in an ELT are due for recharge or replacement
By looking for an expiration date for recharge or replacement on the battery and/or in the aircraft maintenance records
At what time is a test of an installed ELT permitted
During the first 5 minutes after that hour and for no more than 3 sweeps
Where on the aircraft would you expect to find a DME antenna
Generally on the bottom of the fuselage and in a location that isn't blocked by the wing during turns
Describe the shape and location of a transponder antenna
Either a short blade or a short wire with a ball end located on the bottom of the fuselage
Name the basic components of an autopilot system
1. Gyros
2. servos
3. a controller
4. an amplifier or computer
What are the sensing elements of an autopilot system
1. Attitude
2. directional and turning gyros
3. altitude sensor
What is the function of the servos in an autopilot system
The servos actuate the flight controls
What is the purpose of a bonding jumper from a radio shock mount to the airframe
To provide a low-impedance ground return
Describe the procedure used to route coaxial cable from an antenna to a receiver
1. The cable should be supported every 2 feet
2. Bends should be 10 times the cable diameter
3. it should be routed separately from other wires
Which radio system is used for long range communication
HF ( high frequency ) system
What is a transceiver
It is a self contained transmitter and receiver which share the same power supply, antenna, and tuning
Where is the perfected location for mounting a VOR antenna on a small aircraft?
On top of the forward part of the cabin with the apex of the Vee toward the front OR on top of the vertical stabilizer
What are marker beacons
Part of the ILS system, and are used to indicate the aircraft position on the approach to the runway.
What is the indication of the middle marker beacon
It is an amber light and an audible tone
What is the function of the ADF
Back up VOR
What is a barometer
An instrument used to measure the absolute pressure of the atmosphere
What does the ADC do
Receives pneumatic info from the pitot/static ports, converts info into electrical signals & sends the info to Mach airspeed indicator & altimeter
What does the ADIRU box do?
it Supplies air data (airspeed, angle of attack and altitude) and inertial reference (position and attitude) information to the pilots' Electronic Flight Instrument System (EFIS) displays