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