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Annex B Exam Review
Annex B Exam Review
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1
Unauthorized radio transmission pretending to be part of an air traffic control & giving false instructions to a pilot.
Intrusion
Meaconing
Jamming
Interference
2
Higher frequencies have shorter wavelengths.
True
False
3
The amount of refraction that occurs in the ionosphere depends on three main factors?
angle of the dangle, star spangled banner, born in the USA
density of ionosphere, frequency, angle at which the wave enters the layer
density of the ionosphere, frequency, power
frequency, polarization, and electromagnetic fields
4
What does EWCC stand for?
Electronic warfare coordination cell
EWC2
Electronic warfare contingency cell
Electromagnetic warfare communications cell
5
Space waves follow which of the two distinct paths from the transmitting antenna to the receiving antenna?
Through the ionospehere & reflected off the ground to the receiving antenna
HF and VHF
From air to the ground then back to the air again to the receiving antenna
Through the air & reflected from the ground to the receiving antenna
6
A teleport site can be effectively be described as....
DISA
The physical location of your WBSS
Where Rick and Morty travel through green portals
An extension of the step site
7
2 MHz is the equivalent of 2,000 KHz
True
False
8
Passive & active means to protect personnel, facilities & equipment from effects of friendly or enemy employment of EW.
Electronic protection (EP)
Electronic attach (EA)
Electronic support (ES)
Electronic attack (EA)
9
Data rates for narrowband systems a less than _____, whereas data rates for wideband systems are greater than _____.
64 kps, 64 kbs
46 kbps, 46 kbps
62 kbps, 62 kbps
64 kbps, 64 kbps
10
3 major factors to consider when attempting to reduce the attenuation of a surface wave.
polarization, polar bears, frequency
polarization, conductivity of the surface, frequency
frequency, power, polarization
honor, courage, commitment
11
A radio wave propagates from a transmitting antenna to a receiving antenna in 3 principle ways.
True
False
12
The mission of the Marine Tactical Electronic Warfare Squadron (VMAQ) is...
to provide the ACE with a unique anti-jamming capability
provide technical support to NATO forces in regards to use of the spectrum
toprovide EW support to the MAGTF and other designated forces
assist communication squadron with the implementation of EMCON
13
Use of electromagnetic energy, directed energy, or anti-radiation weapons to attack personnel, facilities, or equipment.
Electronic employment (EE)
Electronic intrusion (EI)
Electronic support (ES)
Electronic attack (EA)
14
Deliberately transmitting a signal that causes aircraft, ships, or ground stations to receive false bearings
Interference
Meaconing
Intrusion
Jamming
15
What are sky waves?
radio waves that are reflected & refracted back to earth from ionosphere
a type of space wave
short waves that are usually inverse
hypersonic waves that travel inversely to the atmosphere
16
Obvious jamming is normally simple to detect.
True
False
17
Which polarization is best for a surface wave?
Attenuated
Horizontal
Vertical
Lateral
18
Higher frequencies result in _____ wavelengths.
Electrical
Longer
Shorter
Radio
19
The mission of the Radio Battalion is...
to provide equipment for communication battalions to utilize
to provide COMSEC monitoring, Signals Intelligence, Electronic Warfare.
to prevent the enemy from communicating
to provide Signals Intelligence (SIGINT)
20
Brevity codes should not be used, even when encryption is unavailable, because they require multilateral coordination.
False
True
21
The interruption of military transmissions by a civilian radio broadcast.
Interference
Intrusion
Meaconing
Jamming
22
Ground waves are composed of two separate component waves. They are _____ waves and _____ waves.
Air, sky
Space, signal
Surface, space
Surface, sky
23
Frequency is the number of _____/_____ per second.
spectrum/cycles
wavelengths/cycles
polarization/waves
cycles/waves
24
The lower the frequency of a radio wave, the more rapidly the wave is refracted by a given degree of _____.
Interference
Ionization
Noise
Propagation
25
Propagation is _____ through a _____.
Movement, surface
Movement, outerspace
Movement, medium
Medium, movement
26
What is the VHF frequency band?
30 GHz - 300 MHz
300 MHz - 30 MHz
3 MHz - 300 MHz
30 MHz - 300 MHz
27
Transmitting a tone or noise burst that blocks the reception of information on a frequency.
Jamming
Meaconing
Intrusion
Interference
28
The E layer of the ionosphere ranges from 55-90 miles above the earth.
False
True
29
Measures that electronic protection includes to minimize the the vulnerability of friendly receivers to enemy jamming.
Brevity of transmissions, encryption, radio discipline
Reduced power, frequency hopping, and directional antennas
Reduced power, brevity of transmissions, and directional antennas
EMCON, anti-jamming equipment, frequency hopping
30
The best type of surface for radio wave propagation is one that has good electrical _____.
Compilation
Conductivity
Construction
Connectivity
31
The noise floor is essentially the _____ _____ for radio frequencies.
Background noise
Electromagnetic spectrum
Background signal
Background electricity
32
What is the HF frequency band?
3 MHz - 30 GHz
3 MHz - 30 MHz
3.5 MHz - 35 MHz
30 MHz - 300 MHz
33
The space wave is also referred to as a direct wave.
True
False
34
What is are the forms of atmospheric propagation effects which are associated with radio waves propagation?
Diffraction, reflection, divestment
Refraction, diffraction, reflection
Refraction, reelection, diffraction
Deflection, refraction, reflection
35
_____ is when waves are neither transmitted nor absorbed, but reflected from the surface of the medium they encounter.
Reflection
Refraction
Diffraction
Propagation
36
Common types of electronic attacks are spot, barrage, and sweep electromagnetic jamming.
False
True
37
Although space waves suffer little ground attenuation, they are susceptible to _____.
Frequency changes
Electromagnetic noise
Fading
Electromagnetic interference
38
Which polarization is omni-directional?
Increased
Decreased
Horizontal
Vertical
39
An important factor in determining the density of ionized layers is the _____ angle of the sun, which changes frequently
Elevation
Deviation
Vertical
Horizontal
40
Lower frequencies have _____ wavelengths.
Longer
Shorter
Flexible
Silly
41
Subtle jamming is not obvious, as no sound is heard from the receiver.
False
True
42
Fading refers to reduced signal strength.
True
False
43
Refraction is the changing of frequency as a wave enters the second medium.
True
False
44
What does FOT stand for?
Frequency of terminal transmission
Frequency of optimal radiation
Frequency of optimal transmission
Frequency of transmission
45
10 GHz is the equivalent of 100,000 MHz
True
False
46
HF frequency band propagation is optimal during the solar maxima.
True
False
47
_____ waves are radio waves that travel near the surface of the Earth.
Sky
Air
Ground
Earth
48
LUF stands for largest useable frequency.
False
True
49
What does DISN stand for?
Defense Infrastructure Systems Network
Defense Intelligence Systems Network
Defense Information Systems Network
Defense Information Service Network
50
The two general sources of electromagnetic noise are _____ and _____.
Detrimental, passive
Natural, spatial
Man-made, natural
Passive, extreme
51
The Marine Corps has two types of EW units.
True
False
52
Forms of energy such as sound, light, and radio waves undergo wave propagation.
True
False
53
All electric currents produce _____ _____.
Detrimental interference
Vertical polarization
Electric fields
Horizontal polarization
54
The definition of attenuation is...
increasing the amplitude of a signal or electrical current
propagation through a medium
reduction of the amplitude of a signal, electric current, or oscillation
attention to detail and a starched cover
55
What is the EHF frequency band?
3.0 GHz - 30 GHz
3000 MHz - 3 GHz
30 GHz - 300 GHz
300 GHz - 30 GHz
56
What is the timeline for submitting a satellite access request (SAR)?
90 days
45 days
30 days
60 days
57
Any military action involving use of electromagnetic & directed energy to control the spectrum or to attack the enemy.
EA sports (its in the game)
Electronic support (ES)
Electronic warfare (EW)
Electronic attack (EA)
58
The four main categories of enemy EW attack techniques are...
Meaconing, intrusion, jamming, interaction
Meaconing, intrusion, jamming, interference
Spot, barrage, sweep
Meaconing, intrusion, jamming, invasion
59
_____ is the bending of the wave's path when the wave meets an obstruction.
Refraction
Diffraction
Reflection
Propagation
60
Any radio net that relies on a single freq for long periods of time is susceptible to simple jamming.
True
False
61
The better the conductivity, the less the _____.
Attenuation
Polarization
Attention
Electrical current
62
What is the SHF frequency band?
3 MHz - 30 MHz
3 MHz - 30 GHz
30 GHz - 300 GHz
3 GHz - 30 GHz
63
Search for, intercept, identify, and locate sources of intentional and unintentional radiated electromagnetic energy.
Electronic protection (EP)
Electronic action services (EAS)
Electronic warfare support (ES)
Electronic attack (EA)
64
When possible, you should always encrypt your transmissions.
False
True
65
How are waves measured?
By polarization
From crest to trough.
By frequency over 60 seconds
From crest to crest.
66
Electronic warfare support systems collect data and produce _____ or _____ that can be used to target the enemy.
security, vulnerabilities
waves, energy
information, intelligence
capabilities, limitations
67
Which type of frequencies are rarely diffracted?
Lower frequencies
Higher frequencies
Anything calculated on SPEED
Vertically polarized HF frequencies
68
1 cycle per second = _____.
10 Hz
100 Hz
5 Hz
1 Hz
69
What is the UHF frequency band?
300 GHz - 30 MHz
300 GHz - 3 MHz
30 MHz - 300 GHz
300 MHz - 3 GHz
70
Who develops EMCON plan?
GySgt Noel
Communications Chief
Operations officer
Communications officer
71
_____ waves are radio waves that are reflected and refracted back to Earth from the _____.
Sky, ionosphere
Air, troposphere
Air, ionosphere
Sky, troposphere
