Avionics - Week 1
Avionics Radio Concepts Quiz
Test your knowledge on modulation of radio signals, aircraft radio antennas, and fundamental radio theory concepts. This quiz consists of 52 questions designed to challenge your understanding in avionics.
- Multiple choice questions
- Covering essential topics in radio technology
- Perfect for students and aviation enthusiasts
L1 CLO 4. Explain modulation of radio signals
When FM is used
IDC203027
The signal to be carried is audio, the carrier is of constant frequency
The signal to be carried is used to modulate the amplitude of the carrier
The signal to be carried is used to modulate the frequency of the carrier
The signal to be carried is RF, the carrier is audio
L1 CLO 5. Explain aircraft radio antennas
A ground plane
IDC203044
Is required for an antenna to operate properly
Requires horizontally polarized antennas
Is a non-conducting surface which is large in comparison to the wavelength
Reduces the polarization of the EM wave
L1 CLO 2. Explain Radio Theory
Sound waves and electromagnetic waves
IDC203005
Are complimentary waveforms
Behave identically except for their frequency
May not occupy the same frequency range
Differ in that sound waves require a mechanical medium for propagation
L1 CLO 4. Explain modulation of radio signals
FM radio is higher on the RF band than AM radio because
IDC203033
It is in stereo
It requires more bandwidth
It is higher quality
It requires the stability of higher frequencies
L1 CLO 2. Explain Radio Theory
Electromagnetic radiation
IDC203002
Are waves of electromagnetism that radiate through space carrying radiant energy
Are a man-made phenomenon
Is only active outside earth’s atmosphere
Is always very dangerous if proper precautions are not taken
L1 CLO 2. Explain Radio Theory
Electromagnetic spectrum bands
IDC203004
Are designed to control radio communication protocols
Are classified according to their frequency
Indicate their radiation content
Are divided by their frequency by powers of 10
L1 CLO 5. Explain aircraft radio antennas
What is the relationship between frequency, and wavelength?
IDC203049
Wavelength has no connection to frequency.
Wavelength should be exactly one complete length.
Higher frequencies has longer wavelength.
Higher frequencies has shorter wavelength.
L1 CLO 4. Explain modulation of radio signals
When AM is used
IDC203026
The signal to be carried is used to modulate the phase of the carrier
The signal to be carried is used to modulate the frequency of the carrier
The signal to be carried is RF, the carrier is audio
The signal to be carried is audio, the carrier is of constant frequency
L1 CLO 2. Explain Radio Theory
Polarization
IDC203011
Is the freezing of electromagnetic waves to increase their efficiency
Refers to the positive or negative orientation of an electromagnetic wave
Refers to the amount of electric charge in an electromagnetic wave
Refers to the plane of the electric component of an electromagnetic wave
L1 CLO 4. Explain modulation of radio signals
AM radio is in a lower RF band than FM radio because
IDC203034
It is lower quality
It uses space waves only
Its amplitude is lower
It requires less bandwidth than FM
L1 CLO 4. Explain modulation of radio signals
Modulation
IDC203021
Is the process of varying one EM waveform with another EM waveform
Is the adjustment of the polarity of an EM wave
Refers to the EM waves above the infrared band
Is the relationship between antenna length and frequency
L1 CLO 5. Explain aircraft radio antennas
Maximum power transfer between a transceiver and an antenna will occur when the impedance
IDC203042
Of the antenna is greater than that of the transceiver circuitry
Of the antenna is less than that of the transceiver circuitry
Of the antenna and the transceiver circuitry is the same
Is reduced to zero
L1 CLO 5. Explain aircraft radio antennas
In order for a receiver to receive a radio signal, its antenna
IDC203043
Must be oriented 90° from the transmitting antenna
Must be of the same polarization orientation as the transmitting antenna
Must be vertically polarized
Would be ideally one half the length of the transmitting antenna
L1 CLO 4. Explain modulation of radio signals
Modulation allows
IDC203051
For different frequencies to be used as sky waves
The use of LF radio waves for transmission
For transmission of audio over long distances
For maximum power transfer between an antenna and its circuitry
L1 CLO 4. Explain modulation of radio signals
When FM is used
IDC203030
The signal to be carried is used to modulate the amplitude of the carrier
The signal to be carried is audio, the carrier is of constant amplitude frequency
The signal to be carried is used to modulate the phase of the carrier
The signal to be carried is RF, the carrier is audio
L1 CLO 4. Explain modulation of radio signals
When AM is used
IDC203029
The signal to be carried is audio, the carrier is of varying amplitude
The signal to be carried is used to modulate the frequency of the carrier
The signal to be carried is RF, the carrier is audio
The signal to be carried is used to modulate the phase of the carrier
L1 CLO 2. Explain Radio Theory
Certain frequencies in the electromagnetic spectrum
IDC203007
Are inherently unstable
Are banned from use by international law
Can be used to generate nuclear power
Can be seen by human eyes
L1 CLO 2. Explain Radio Theory
Electromagnetic waves
IDC203006
Can only radiate in outer space
Can be detected by the human ear at certain frequencies
Do not require a medium for propagation
Require matter or molecules in order to radiate
L1 CLO 2. Explain Radio Theory
Space waves
IDC203019
Are low frequency waves
Penetrate the ionosphere rather than being reflected off of it
Do not travel well in the earth’s atmosphere
Follow the curvature of the atmosphere as they travel through space
L1 CLO 2. Explain Radio Theory
Ground waves
IDC203015
Are of such a low frequency that they travel through the ground
Require a proper ground to operate correctly
Follow the curvature of the earth’s surface as they travel through the atmosphere
Are in the VHF band
L1 CLO 2. Explain Radio Theory
What is the definition of frequency?
IDC203050
Number of alternations per second
Number of cycles per minute
Number of cycles per second
Number of wavelengths
L1 CLO 4. Explain modulation of radio signals
When FM is used
IDC203028
The signal to be carried is used to modulate the phase of the carrier
The signal to be carried is used to modulate the amplitude of the carrier
The signal to be carried is RF, the carrier is audio
The signal to be carried is audio, the carrier is of varying frequency
L1 CLO 4. Explain modulation of radio signals
Modulated radio waves
IDC203032
Are used only in the internal circuitry of the receiver
Are prohibited by international law
Are of reverse polarity
Are transmitted
L1 CLO 5. Explain aircraft radio antennas
An antenna
IDC203038
Uses the principle of resistance to operate
Is used to demodulate the incoming signal
Is a conductor used to transmit and receive radio signals
Must be made of a non-conductive material
L1 CLO 4. Explain modulation of radio signals
AM and FM
IDC203023
Are types of frequencies
Are types of modulation
Are UHF technologies
Refer to the type of audio being broadcast
L1 CLO 2. Explain Radio Theory
The electromagnetic spectrum
IDC203003
Covers electromagnetic waves with frequencies below 1 Hz to above 10^25Hz
Is produced by an AC generator
Is the band of frequencies that can be used for radio communication
Shows all of the colours of the rainbow that are visible to human eyes
L1 CLO 4. Explain modulation of radio signals
The three most common forms of modulation are
IDC203024
AM, FM, and pulse
HF, VHF and UHF
RF, LF and MF
Ultraviolet, Infrared and microwave
L1 CLO 5. Explain aircraft radio antennas
What is true about EM waves?
IDC203046
Speed depends on the frequency of the radio wave
It travels at MACH 1
It travels at Speed of sound
They travel at a constant Speed
L1 CLO 5. Explain aircraft radio antennas
What is the typical impedance of an aircraft antenna?
IDC203048
150 ohms
50 ohms
600 ohms
75 ohms
L1 CLO 2. Explain Radio Theory
The range of human hearing
IDC203037
Is between 535 MHz and 1705 MHz
Is between 20 Hz and 20 KHz
Is between 88 KHz and 106 KHz
Is between 535 KHz and 1705 KHz
L1 CLO 4. Explain modulation of radio signals
Receiver circuitry
ID203031
Amplifies the signal for transmission
Separates the signal from the carrier
Induces a current from the transmitted EM waves
Sends signals that modify the carrier
L1 CLO 2. Explain Radio Theory
The electric and magnetic components of electromagnetic waves
IDC203010
Are at right angles to each other
Combine to increase power
Are opposites and thus repel each other
Are created separately inside a transmitter
L1 CLO 5. Explain aircraft radio antennas
Frequency and wavelength
IDC203039
Are directly proportional
Are inversely proportional
Are unrelated
Are the same if they are in phase
L1 CLO 2. Explain Radio Theory
The FM band
IDC203036
Is between 88 KHz and 106 KHz
Is between 88 MHz and 108 MHz
Is between 535 MHz and 1705 MHz
Is between 20 Hz and 20 KHz
L1 CLO 4. Explain modulation of radio signals
The process of varying one EM form with another EM waveform is called
IDC203022
Modulation
Mixing
Reception
Transmission
L1 CLO 2. Explain Radio Theory
Electromagnetic waves
IDC203009
Are impervious to interference
Cannot travel through solid matter
Are made of electric and magnetic fields
Are just electrical impulses
L1 CLO 5. Explain aircraft radio antennas
Lower frequency signals
IDC203041
Require vertically polarized antennas
Require horizontally polarized antennas
Require longer antennas
Require shorter antennas
L1 CLO 2. Explain Radio Theory
Waves that travel in a straight line and bounce off the ionosphere are known as
IDC203018
Microwaves
Space waves
Sky waves
Ground waves
L1 CLO 2. Explain Radio Theory
Electromagnetic waves
IDC203012
Propagate through the air at effectively the speed of light
Travel at the speed of sound at sea level
Are created in the receiver for transmission through the receiver antenna
Have varying speeds of travel according to frequency
L1 CLO 2. Explain Radio Theory
EM waves that travel in a straight line and are not affected by the ionosphere are known as
IDC203020
AM radio waves
Sky waves
Ground waves
Space waves
L1 CLO 2. Explain Radio Theory
Aviation RF Bands
IDC203008
Are regulated by law
Do not belong to the electromagnetic spectrum
Vary from country to country
Are designed for maximum transmission distance
L1 CLO 4. Explain modulation of radio signals
When Pulse modulation is used
IDC203035
The carrier must be in the audio range
The signal to be carried is audio, the carrier is RF
The wavelength is higher
The signal to be carried is ones and zeroes, or digital data
L1 CLO 5. Explain aircraft radio antennas
What do most aircraft antenna systems use for a “ground plane”?
IDC203045
A “Resonator”
The aircraft skin
A 50 ohm “Terminator” plug
RU-CBGB coaxial cable
L1 CLO 2. Explain Radio Theory
EM waves
IDC203013
Are generated by a transmitter and fed to an antenna for propagation
Are captured by the transmitter antenna for processing in the receiver
Are generated by the receiver for propagation through the receiver antenna
Require air molecules to facilitate transmission
L1 CLO 2. Explain Radio Theory
EM waves that follow the curvature of the earth’s surface
IDC203016
Are known as sky waves
Are known as ground waves
Travel slower than those that travel through space
Are very high frequency
L1 CLO 2. Explain Radio Theory
Sky waves
IDC203017
Travel straight through the ionosphere
Travel in straight lines
Are in the microwave band
Are very short range
L1 CLO 5. Explain aircraft radio antennas
Higher frequency signals
IDC203040
Require shorter antennas
Require horizontally polarized antennas
Require longer antennas
Require vertically polarized antennas
L1 CLO 2. Explain Radio Theory
EM waves once transmitted
IDC203014
Can be received by a receiver antenna which has a current induced in it
Are controlled by the transmission antenna
Can be received by a receiver antenna which reinforces the signal
Get stronger with distance
L1 CLO 5. Explain aircraft radio antennas
Maximum Power Transfer will occur when the antenna and the receiver are the same
IDC203047
Power
Material
Length
Impedance
L1 CLO 2. Explain Radio Theory
The AM band
IDC203052
Is between 88 KHz and 108 KHz
Is between 535 KHz and 1705 KHz
Is between 20 Hz and 20 KHz
Is between 535 MHz and 1705 MHz
L1 CLO 1. Explain CARS, WHMIS, HFIM and SMS procedures.
M type AMEs
IDC203001
Have nothing to do with avionics systems
Must have knowledge of avionics because of its high level of integration with aircraft systems and the accompanying safety requirements
Specialize in avionics work
Never need work on avionics
L1 CLO 4. Explain modulation of radio signals
When AM is used
IDC203025
The signal to be carried is used to modulate the frequency of the carrier
The signal to be carried is used to modulate the amplitude of the carrier
The signal to be carried is RF, the carrier is audio
The signal to be carried is audio, the carrier is of varying frequency
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