We have sent an email with your new password.


CDC 3d153 volume 2 v2 (april 2013)

100 Questions  I  By Mmikhaylevskiy
  • Share This on Twitter
  • +
CDC Quizzes & Trivia
CDC 3D153 01 1206, Edit Code 02 (April 2013) Volume 2 Units 1-5 Unit 1: Antenna Theory Unit 2: Electromagnetic Wave Theory Unit 3: Transmission Security Techniques, Data Linking Concepts and Jam-Resistant Communications Unit 4: Other RF Transmission Systems Unit 5: High Frequency Communications

   or Create Online Exam
Changes are done, please start the quiz.


Question Excerpt

Removing question excerpt is a premium feature

Upgrade and get a lot more done!
1.  What is the maximum power of the AN/PRC–150 in FM mode?
A.
B.
C.
D.
2.  Which multiple channel access method eliminates the requirement for a net control station in the joint tactical information distribution system?
A.
B.
C.
D.
3.  What has the greatest effect on an antenna?
A.
B.
C.
D.
4.  Which frequency band is most susceptible to jamming?
A.
B.
C.
D.
5.  Which electronic warfare component responds to taskings to search for, intercept, identify, and locate intentional and unintentional sources of radiated energy?
A.
B.
C.
D.
6.  What is a common problem with a mass alert system in a deployed environment?
A.
B.
C.
D.
7.  What is the primary transmission path for frequencies in the super high/extremely high frequency range?
A.
B.
C.
D.
8.  The earth’s conductivity is determined by the type of
A.
B.
C.
D.
9.  What type of directivity does the whip antenna provide?
A.
B.
C.
D.
10.  Line of sight radio waves that are guided through the air between two layers of the atmosphere are known as
A.
B.
C.
D.
11.  The common name for the method of changing the encryption keys over the radio channel in a two-way radio system is called
A.
B.
C.
D.
12.  Sunspots occur on an
A.
B.
C.
D.
13.  How many programmable devices can the multi-band inter/intra team radio hold?
A.
B.
C.
D.
14.  What identifies the output power of the AN/GRC–171B(V)4 transceiver?
A.
B.
C.
D.
15.  Leakage loss in a transmission line can be minimized by using a
A.
B.
C.
D.
16.  In mountainous terrain, with a mountain between you and the distant end, which of these antennas is more effective?
A.
B.
C.
D.
17.  What does the overall effectiveness of an entire transmitting and receiving system depend largely upon?
A.
B.
C.
D.
18.  In HF communications, the lowest frequency that arrives at the distant receiver on 90 percent of the undisturbed days of the month is called the
A.
B.
C.
D.
19.  What Air Force instruction (AFI) requires communications squadrons to maintain “installation warning systems”?
A.
B.
C.
D.
20.  Name the process of unscrambling the encrypted information so that it is intelligible.
A.
B.
C.
D.
21.  What antenna radiates or receives on many of its particular elements?
A.
B.
C.
D.
22.  Near-vertical-incidence sky wave operations are most effective when you’re using
A.
B.
C.
D.
23.  How many selectable traffic key slots does the KG–84A have?
A.
B.
C.
D.
24.  What basic receiver function involves having the transmitted electromagnetic wave pass through the receive antenna in such a manner as to induce a voltage in the antenna?
A.
B.
C.
D.
25.  Where do the modulation and digital-to-analog conversion take place in the AN/PRC– 150?
A.
B.
C.
D.
26.  Which of the following CANNOT be performed by the transceiver’s computerized components and micro-circuitry?
A.
B.
C.
D.
27.  What commonly referred link is the joint tactical information distribution system?
A.
B.
C.
D.
28.  What is the first step in electronic warfare application?
A.
B.
C.
D.
29.  In the Whelen system, how many digits make up the dual tone multi frequency (DTMF) protocol.
A.
B.
C.
D.
30.  A dipole or long-wire antenna is an example of a
A.
B.
C.
D.
31.  A nonresonant transmission line is a line
A.
B.
C.
D.
32.  What type of network radio does the Air Force use for close air support?
A.
B.
C.
D.
33.  If the electric field component travels in a plane perpendicular to the Earth’s surface, the radio wave is considered to be polarized
A.
B.
C.
D.
34.  The main very high frequency/ultra high frequency communications emphasis is on
A.
B.
C.
D.
35.  Which basic field detaches from the antenna and travels through space at great distances?
A.
B.
C.
D.
36.  In high frequency communications, your station’s self address is the address
A.
B.
C.
D.
37.  How many talkgroups can a trunked mobile radio monitor at one time?
A.
B.
C.
D.
38.  Which conventional land mobile radio device serves as the hub of a net?
A.
B.
C.
D.
39.  From what source does the RT–1523 SINCGARS radio’s control module obtain instructions during remote and local operation respectively?
A.
B.
C.
D.
40.  How many regions make up the atmosphere?
A.
B.
C.
D.
41.  Super high/extremely high frequency range is limited to
A.
B.
C.
D.
42.  When comparing the radio and optical horizons, which one is farther away and by what percent?
A.
B.
C.
D.
43.  Resistance of the conductor material in a transmission line leads to which type of loss?
A.
B.
C.
D.
44.  A helical satellite antenna radiates a signal with what type of polarization?
A.
B.
C.
D.
45.  Which environment area will increase maintenance problems with dust and sand?
A.
B.
C.
D.
46.  The family of radios that are scaled for use in all domains, will function with programmable waveforms, and be based on a common core architecture is the
A.
B.
C.
D.
47.  The standard used to measure the radiating effectiveness (gain) of an antenna system is the
A.
B.
C.
D.
48.  In selecting an antenna for a circuit, what is the first thing to consider?
A.
B.
C.
D.
49.  A transmission line that consists of a center conductor placed inside a rigid metal tube functioning as the outer tube is called a
A.
B.
C.
D.
50.  Radio waves that angled too low are
A.
B.
C.
D.
51.  Ungrounded lengths of wire specifically designed to be either a half-wavelength or more than full wavelength long is called a
A.
B.
C.
D.
52.  What assembly on the AN/PRC–150 contains the keyboard and the liquid crystal display (LCD) that makes up the radio’s man-machine interface?
A.
B.
C.
D.
53.  A common satellite antenna is the
A.
B.
C.
D.
54.  Which antenna radiates radio energy equally well in all directions?
A.
B.
C.
D.
55.  What frequency bands does the MILSTAR satellite system uses?
A.
B.
C.
D.
56.  What is probably the worst antenna that can be used on sky-wave circuits?
A.
B.
C.
D.
57.  Radio waves that travel near the earth’s surface are called
A.
B.
C.
D.
58.  Which type of airborne antenna can be designed into any part of an aerospace vehicle’s surface, so that it does not upset its aerodynamic properties?
A.
B.
C.
D.
59.  Which environment would be considered the most challenging for an RF transmission systems technician to establish and operate a radio station from?
A.
B.
C.
D.
60.  In siting a radio station, which foliage would have more of an adverse effect on radio wave propagation?
A.
B.
C.
D.
61.  The ability of a receiver to reproduce the signal of a very weak station is the characteristic of the receiver’s
A.
B.
C.
D.
62.  Concerning HAVE QUICK II communications multiple word-of-day (MWOD), how long can each word-of-day (WOD) be used?
A.
B.
C.
D.
63.  Which switch on the KY–57 VINSON zeroizes channels one through five?
A.
B.
C.
D.
64.  In HF communications, by replacing the vertical antenna with a dipole antenna that’s a quarter wavelength off the ground, what are you able to get from your antenna transmission?
A.
B.
C.
D.
65.  Equipment used for generating, amplifying, and transmitting RF carrier is collectively called
A.
B.
C.
D.
66.  Radio sets are left on 24-hours a day in a jungle environment to
A.
B.
C.
D.
67.  The ability of an antenna to both receive and transmit equally well is known as the antenna’s
A.
B.
C.
D.
68.  Who has the ability to patch different talkgroups together?
A.
B.
C.
D.
69.  Magneton splitting creates two waves called
A.
B.
C.
D.
70.  Examples of electronic protection includes all of the following EXCEPT
A.
B.
C.
D.
71.  In dealing with sky/ground wave propagation, the area of silence where no signals are received is known as the
A.
B.
C.
D.
72.  What two properties of a transmission line determine its characteristic impedance?
A.
B.
C.
D.
73.  In the Whelen siren cabinet, what controls signal routing and power distribution of the system?
A.
B.
C.
D.
74.  The refractive index of air depends on moisture,
A.
B.
C.
D.
75.  What is one of the simplest and most functional antennas in use?
A.
B.
C.
D.
76.  What U.S. government agency divides the radio frequency spectrum into different bands?
A.
B.
C.
D.
77.  In frequency hopping operation, the interval at which each transmitter remains on a given frequency for a specific time is known as
A.
B.
C.
D.
78.  The concept that alternating current changes in magnitude and reverses its direction during each cycle is
A.
B.
C.
D.
79.  Which statement is NOT a characteristic of the AN/GRC–171B(V)4 transceiver?
A.
B.
C.
D.
80.  What are the three part data handshake between calling and receiving stations?
A.
B.
C.
D.
81.  Scientist call the ionosphere an extension of the
A.
B.
C.
D.
82.  Which statement concerning waveguides is FALSE?
A.
B.
C.
D.
83.  What permits communication in shadow regions behind obstacles?
A.
B.
C.
D.
84.  What is the minimum length for a long-wire antenna?
A.
B.
C.
D.
85.  Sky wave transmission is used for which type of communications?
A.
B.
C.
D.
86.  Which statement concerning line lengths is TRUE?
A.
B.
C.
D.
87.  Areas in which no antenna radiation pattern passes through are called
A.
B.
C.
D.
88.  What occurs when high-energy ultraviolet light waves from the sun enter the ionospheric region of the atmosphere and strike the gas atoms?
A.
B.
C.
D.
89.  Transmitting a signal on a particular frequency in order to determine that channel’s usability is referred to as
A.
B.
C.
D.
90.  What frequency range will show little effect from precipitation?
A.
B.
C.
D.
91.  What measurement is used to determine whether an antenna is resonant at a particular frequency?
A.
B.
C.
D.
92.  At what point do magnetic fields around a wire no longer have time to collapse completely between alternations?
A.
B.
C.
D.
93.  If a transmission line is terminated in an open, what will likely result?
A.
B.
C.
D.
94.  Sunspots are disturbances
A.
B.
C.
D.
95.  The actual range of frequencies within the antenna’s bandwidth is called the
A.
B.
C.
D.
96.  Using figure 1–10, determine the electrical length if the frequency is changed from 150 MHz to 250 MHz.
A.
B.
C.
D.
97.  Which antenna type is usually used on long-range, point-to-point communication where the concentrated radio energy is needed for circuit reliability?
A.
B.
C.
D.
98.  The ability to reproduce the input signal accurately is the characteristics of the receiver’s
A.
B.
C.
D.
99.  A long-wire’s takeoff angle depends on the antenna’s
A.
B.
C.
D.
100.  The angle at which a radio wave enters the ionosphere is known as the
A.
B.
C.
D.
Back to top

Removing ad is a premium feature

Upgrade and get a lot more done!
Take Another Quiz