Vol2 Ure1 CDC 3D153
This quiz to be used as a study aid for the RF transmission systems 5 level cdc course.
- 1.
(201) Equipment used for generating, amplifying, and transmitting RF carrier is collectively called a?
- A.
A receiver
- B.
An antenna
- C.
A transmitter
- D.
A transmission line
Correct Answer
C. A transmitter -
- 2.
(201) 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.
Reproduction
- B.
Reception
- C.
Detection
- D.
Selection
Correct Answer
B. Reception -
- 3.
(201) The ability to reproduce the input signal accurately is the characteristics of the receiver’s?
- A.
Fidelity
- B.
Capacity
- C.
Sensitivity
- D.
Selectivity
Correct Answer
A. Fidelity -
- 4.
(202) A combination of a transmitter and receiver that is built as a single unit and sharing common tuned circuits is called a?
- A.
Transmitter
- B.
Transceiver
- C.
Receiver
- D.
Coupler
Correct Answer
B. Transceiver -
- 5.
(202) Which of the following cannot be performed by the transceiver’s computerized components and micro-circuitry?
- A.
Specific equipment faults
- B.
Internal equipment tests
- C.
Internal calibrations
- D.
Repair itself
Correct Answer
D. Repair itself -
- 6.
(203) A transmission line that consists of a center conductor placed inside a metal tube functioning as the outer tube is called a?
- A.
Flexible coaxial cable
- B.
Rigid coaxial cable
- C.
Waveguide
- D.
Twin lead
Correct Answer
B. Rigid coaxial cable -
- 7.
(203) Which selection best describes the term “cutoff frequency” when discussing transmission line properties?
- A.
The frequency where XL becomes so low that the signal is shunted.
- B.
The frequency where XC causes the signal to be shunted.
- C.
The lowest frequency that the line can pass successfully
- D.
The frequency at which standing waves are maximum.
Correct Answer
B. The frequency where XC causes the signal to be shunted. -
- 8.
(203) Using figure 1–10, determine the wavelength if the frequency is changed from 150 MHz to 250 MHz.
- A.
12.0 meters.
- B.
3.0 meters
- C.
1.5 meters
- D.
1.2 meters
Correct Answer
D. 1.2 meters -
- 9.
(203) Using figure 1–10, determine the electrical length if the frequency is changed from 150 MHz to 250 MHz.
- A.
8.33 meters
- B.
8.33 wavelengths
- C.
83.3 meters
- D.
83.3 wavelengths
Correct Answer
B. 8.33 wavelengths -
- 10.
A nonresonant transmission line is a line?
- A.
Having reflected waves
- B.
Having no reflected waves
- C.
With maximum voltage across its open termination
- D.
With maximum voltage across its shorted termination
Correct Answer
B. Having no reflected waves -
- 11.
(203) If a transmission line is terminated in a short,
- A.
Current is maximum and voltage at minimum at the termination
- B.
Current is at minimum and voltage at maximum at the termination
- C.
There would be a nominal amount of signal gain
- D.
The line would be nonresonant
Correct Answer
A. Current is maximum and voltage at minimum at the termination -
- 12.
(204) In a basic communication system, what converts radio frequency (RF) energy’s current oscillation into electric and magnetic fields of force?
- A.
Antenna
- B.
Coupler
- C.
Transmitter
- D.
Transmission lines
Correct Answer
A. Antenna -
- 13.
(204) The concept that alternating current (AC) changes in magnitude and reverses its direction during each cycle is?
- A.
An unproven hypothesis
- B.
The definition of propagation
- C.
What makes radio transmission possible
- D.
What led to the discovery of direct current
Correct Answer
C. What makes radio transmission possible -
- 14.
(205) If the electric field component travels in a plane perpendicular to the Earth’s surface, the radio wave is?
- A.
Magnetically polarized
- B.
Horizontally polarized
- C.
Circularly polarized
- D.
Vertically polarized
Correct Answer
D. Vertically polarized -
- 15.
(205) What types of polarization do satellite terminals transmit and receive?
- A.
Transmit horizontal and receive vertical polarizations
- B.
Transmit vertical and receive horizontal polarizations
- C.
Transmit right hand and receive left hand circular polarizations.
- D.
Transmit left hand and receive right hand circular polarizations
Correct Answer
C. Transmit right hand and receive left hand circular polarizations. -
- 16.
(206) What measurement is used to determine whether an antenna is resonant at a particular frequency?
- A.
Distortion
- B.
Standing Wave Ratio
- C.
Signal-to-noise ratio
- D.
Percent of modulation
Correct Answer
B. Standing Wave Ratio -
- 17.
(206) The ability of an antenna to both receive and transmit equally well is known as the antenna’s?
- A.
Bandwidth
- B.
Resonance
- C.
Reciprocity
- D.
Effectiveness
Correct Answer
C. Reciprocity -
- 18.
(206) The standard used to measure the radiating effectiveness (gain) of an antenna system is the?
- A.
Marconi antenna
- B.
Isotropic antenna
- C.
Hertz antenna
- D.
Whip antenna
Correct Answer
B. Isotropic antenna -
- 19.
(206) What does the effectiveness of an entire transmitting and receiving system depend largely upon?
- A.
Impedance matching
- B.
Antenna distance
- C.
Antenna properties
- D.
Line characteristics
Correct Answer
A. Impedance matching -
- 20.
(207) Which antenna radiates radio energy in a circular pattern?
- A.
Omnidirectional
- B.
Unidirectional
- C.
Bidirectional
- D.
Circular
Correct Answer
A. Omnidirectional -
- 21.
(207) Which antenna type is usually used on long-range, point-to-point circuits where the concentrated radio energy is needed for circuitry reliability?
- A.
Omnidirectional
- B.
Unidirectional
- C.
Bidirectional
- D.
Circular
Correct Answer
B. Unidirectional -
- 22.
(208) Ungrounded lengths of wire specifically designed to be either a half-wavelength or more than full wavelength long is called a?
- A.
Reflector
- B.
Hertz antenna
- C.
Marconi antenna
- D.
Vertical monopole
Correct Answer
B. Hertz antenna -
- 23.
(209) A long-wire’s takeoff angle depends on the antenna’s?
- A.
Length
- B.
Directivity
- C.
Front-to-back ratio
- D.
Standing wave ratio
Correct Answer
A. Length -
- 24.
(209) All antennas used in satellite communications are designed to be?
- A.
Circular directional
- B.
Omnidirectional
- C.
Bidirectional
- D.
Directional
Correct Answer
D. Directional -
- 25.
(209) A common satellite antenna is the?
- A.
Whip
- B.
Discone
- C.
Parabolic
- D.
Long-wire
Correct Answer
C. Parabolic -
- 26.
(209) A helical antenna radiates a signal with what type of polarization?
- A.
Horizontal
- B.
Vertical
- C.
Circular
- D.
Linear
Correct Answer
C. Circular -
- 27.
(210) Aircraft antennas are housed?
- A.
Inside nonconductive radomes mounted outside or flush with the fuselage.
- B.
Inside conductive radomes mounted outside or flush with the fuselage
- C.
Outside nonconductive radomes mounted outside the fuselage.
- D.
Inside conductive radomes mounted flush with the fuselage.
Correct Answer
A. Inside nonconductive radomes mounted outside or flush with the fuselage. -
- 28.
(210) In airborne antenna applications for frequencies in the upper portion of the HF band, what vertical angles are used for multi-hop, long distance transmission?
- A.
90 and 180 degrees
- B.
60 and 90 degrees
- C.
30 and 60 degrees
- D.
5 and 30 degrees
Correct Answer
D. 5 and 30 degrees -
- 29.
(210) What determines an antenna’s location and orientation on the aircraft?
- A.
Antennas always reguire a 360 degree radiating pattern.
- B.
The type of aircraft propulsion and power system.
- C.
Antennas are always mounted on top of the fuselage.
- D.
Optimizing the antenna's radiating pattern for its application.
Correct Answer
D. Optimizing the antenna's radiating pattern for its application. -
- 30.
(210) 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.
Fixed blade
- B.
Conformal
- C.
Probe tip
- D.
Whip
Correct Answer
B. Conformal -
- 31.
(211) In selecting an antenna for a circuit, what is the first thing to look at?
- A.
Type of propagation
- B.
Selecting the antenna
- C.
Determine the distance
- D.
Finding the operating frequency
Correct Answer
A. Type of propagation -
- 32.
(212) Which object has the greatest effect on an antenna?
- A.
Sun
- B.
Earth
- C.
Operator
- D.
Ionosphere
Correct Answer
B. Earth -
- 33.
(212) Where is the most challenging location for a radio frequency (RF) transmission systems technician to establish and operate a radio station from?
- A.
Amazon Jungle
- B.
North Pole
- C.
Sahara Desert
- D.
Sierra Nevada mountains
Correct Answer
A. Amazon Jungle -
- 34.
(212) With a mountain between you and the distant end, which antenna is more effective?
- A.
Whip
- B.
Dipole
- C.
Discone
- D.
Near-Vertical Incidence skywave
Correct Answer
D. Near-Vertical Incidence skywave -
Quiz Review Timeline +
Our quizzes are rigorously reviewed, monitored and continuously updated by our expert board to maintain accuracy, relevance, and timeliness.
-
Current Version
-
Mar 14, 2022Quiz Edited by
ProProfs Editorial Team -
Jul 30, 2012Quiz Created by
Jayhuiz23
- ACA Quizzes
- ACCA Quizzes
- ACE Quizzes
- BCBA Quizzes
- CCP Quizzes
- CDCs Quizzes
- CEH Quizzes
- CISA Quizzes
- CISCO Quizzes
- CISSP Quizzes
- CompTIA Quizzes
- CPA Quizzes
- CPAT Quizzes
- CPFA Quizzes
- CPP Quizzes
- CPT Quizzes
- CSA Quizzes
- CSET Quizzes
- CST Quizzes
- CSWIP Quizzes
- FTCE Quizzes
- HIPAA Quizzes
- IAHCSMM Quizzes
- ISTQB Quizzes
- LEED Ga Quizzes
- MBLEx Quizzes
- TEAS Quizzes
Back to top