TEST BANK
Electronic Communications: A Systems Approach 1st Edition
By Jeffrey Beasley, Jonathan Hymer
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ST
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LU
TI
O
N
, TABLE OF CONTENT
1. Fundamental Communications Concepts
2. Amplitude Modulation
3. Angle Modulation
4. Communications Circuits
5. Transmitters
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6. Receivers
7. Digital Communications Techniques
8. Digital Modulation and Demodulation
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9. Telephone Networks
10. Wireless Communications Systems
11. Computer Communication and the Internet
12. Transmission Lines
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13. Wave Propagation
14. Antennas
15. Waveguides and Radar
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16. Fiber Optics
Appendix A: FCC General Radiotelephone Operator License (GROL) Requirements
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Beasley/Electronic Communications
Chapter 1: Fundamental Communications Concept
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Multiple Choice Questions
1. What agency in the United States has been given the authority to establish and enforce
regulations regarding the use of radio transmitters and other generators of radio-
frequency energy?
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A. Transport and Communications Ministry
B. Federal Communications Commission (FCC)
C. International Telecommunication Union (ITU)
D. Bell Laboratories
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2. What three ratios do decibels represent?
A. Powers, voltages, currents
B. Powers, voltages, frequencies
C. Voltages, frequencies, impedances
D. Logarithms, voltages, currents
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3. Electric and magnetic fields both result from voltage potentials and .
A. Radio frequencies
B. Audio frequencies
C. Current flows
D. Electric charges
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4. The carrier is often a(n) .
A. sine wave
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B. vector
C. angular frequency
D. amplitude modulation
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5. Electronics as a discipline within the field of physical science emerged from the
discovery of .
A. microwaves
B. gamma rays
C. cosmic rays
D. radio waves
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All Chapters Included
6. What two factors limit all communication systems?
A. Bandwidth and noise All Answers Included
B. Bandwidth and frequency
C. Noise and decibels
D. Noise and currents
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7. You are troubleshooting a piece of equipment and you find that unauthorized
modifications may have been performed on the equipment. What type of failure does this
situation represent?
A. Faulty
B. Complete
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C. Induced
D. Poor system performance
8. Which of the following is an essential attribute for being an effective troubleshooter?
A. To know the latest trends in noise analysis
SO
B. To be able to limit the frequency response
C. To know the conversion from the time to the frequency domain
D. To be able to isolate faulty components quickly and repair the defective circuit
9. Which of the following is the most troublesome form of external noise?
A. Atmospheric
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B. Human-made
C. Space
D. Thermal
10. White noise is directly proportional to both temperature and .
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A. bandwidth
B. AC voltage
C. power transfer
D. frequency
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11. The overall noise-intensity versus frequency curves for semiconductor devices would
have what type of shape?
N
A. Angular
B. Square
C. Bathtub
D. Uneven
12. Which of the following did French mathematician Jean Baptiste Joseph Fourier develop?
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Electronic Communications: A Systems Approach 1st Edition
By Jeffrey Beasley, Jonathan Hymer
TE
ST
SO
LU
TI
O
N
, TABLE OF CONTENT
1. Fundamental Communications Concepts
2. Amplitude Modulation
3. Angle Modulation
4. Communications Circuits
5. Transmitters
TE
6. Receivers
7. Digital Communications Techniques
8. Digital Modulation and Demodulation
ST
9. Telephone Networks
10. Wireless Communications Systems
11. Computer Communication and the Internet
12. Transmission Lines
SO
13. Wave Propagation
14. Antennas
15. Waveguides and Radar
LU
16. Fiber Optics
Appendix A: FCC General Radiotelephone Operator License (GROL) Requirements
TI
O
N
, hgfds
Beasley/Electronic Communications
Chapter 1: Fundamental Communications Concept
TE
Multiple Choice Questions
1. What agency in the United States has been given the authority to establish and enforce
regulations regarding the use of radio transmitters and other generators of radio-
frequency energy?
ST
A. Transport and Communications Ministry
B. Federal Communications Commission (FCC)
C. International Telecommunication Union (ITU)
D. Bell Laboratories
SO
2. What three ratios do decibels represent?
A. Powers, voltages, currents
B. Powers, voltages, frequencies
C. Voltages, frequencies, impedances
D. Logarithms, voltages, currents
LU
3. Electric and magnetic fields both result from voltage potentials and .
A. Radio frequencies
B. Audio frequencies
C. Current flows
D. Electric charges
TI
4. The carrier is often a(n) .
A. sine wave
O
B. vector
C. angular frequency
D. amplitude modulation
N
5. Electronics as a discipline within the field of physical science emerged from the
discovery of .
A. microwaves
B. gamma rays
C. cosmic rays
D. radio waves
hgtrfed
, hgfds
All Chapters Included
6. What two factors limit all communication systems?
A. Bandwidth and noise All Answers Included
B. Bandwidth and frequency
C. Noise and decibels
D. Noise and currents
TE
7. You are troubleshooting a piece of equipment and you find that unauthorized
modifications may have been performed on the equipment. What type of failure does this
situation represent?
A. Faulty
B. Complete
ST
C. Induced
D. Poor system performance
8. Which of the following is an essential attribute for being an effective troubleshooter?
A. To know the latest trends in noise analysis
SO
B. To be able to limit the frequency response
C. To know the conversion from the time to the frequency domain
D. To be able to isolate faulty components quickly and repair the defective circuit
9. Which of the following is the most troublesome form of external noise?
A. Atmospheric
LU
B. Human-made
C. Space
D. Thermal
10. White noise is directly proportional to both temperature and .
TI
A. bandwidth
B. AC voltage
C. power transfer
D. frequency
O
11. The overall noise-intensity versus frequency curves for semiconductor devices would
have what type of shape?
N
A. Angular
B. Square
C. Bathtub
D. Uneven
12. Which of the following did French mathematician Jean Baptiste Joseph Fourier develop?
hgtrfed
