TEST BANK
Electronic Communications: A Systems Approach, 1st edition
by Jeffrey Beasley, Jonathan Hymer
LU
XE
LI
BR
AR
Y
, TABLE OF CONTENT
1. Fundamental Communications Concepts
2. Amplitude Modulation
3. Angle Modulation
4. Communications Circuits
5. Transmitters
6. Receivers
LU
7. Digital Communications Techniques
8. Digital Modulation and Demodulation
9. Telephone Networks
XE
10. Wireless Communications Systems
11. Computer Communication and the Internet
12. Transmission Lines
LI
13. Wave Propagation
14. Antennas
BR
15. Waveguides and Radar
16. Fiber Optics
AR
Y
, hgfds
Beasley/Electronic Communications
Chapter 1: Fundamental Communications Concept
Multiple Choice Questions
LU
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?
A. Transport and Communications Ministry
XE
B. Federal Communications Commission (FCC)
C. International Telecommunication Union (ITU)
D. Bell Laboratories
2. What three ratios do decibels represent?
LI
A. Powers, voltages, currents
B. Powers, voltages, frequencies
C. Voltages, frequencies, impedances
D. Logarithms, voltages, currents
BR
3. Electric and magnetic fields both result from voltage potentials and .
A. Radio frequencies
B. Audio frequencies
C. Current flows
AR
D. Electric charges
4. The carrier is often a(n) .
A. sine wave
B. vector
C. angular frequency
Y
D. amplitude modulation
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
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?
LU
A. Faulty
B. Complete
C. Induced
D. Poor system performance
XE
8. Which of the following is an essential attribute for being an effective troubleshooter?
A. To know the latest trends in noise analysis
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
LI
9. Which of the following is the most troublesome form of external noise?
BR
A. Atmospheric
B. Human-made
C. Space
D. Thermal
10. White noise is directly proportional to both temperature and .
AR
A. bandwidth
B. AC voltage
C. power transfer
D. frequency
11. The overall noise-intensity versus frequency curves for semiconductor devices would
Y
have what type of shape?
A. Angular
B. Square
C. Bathtub
D. Uneven
12. Which of the following did French mathematician Jean Baptiste Joseph Fourier develop?
hgtrfed
Electronic Communications: A Systems Approach, 1st edition
by Jeffrey Beasley, Jonathan Hymer
LU
XE
LI
BR
AR
Y
, TABLE OF CONTENT
1. Fundamental Communications Concepts
2. Amplitude Modulation
3. Angle Modulation
4. Communications Circuits
5. Transmitters
6. Receivers
LU
7. Digital Communications Techniques
8. Digital Modulation and Demodulation
9. Telephone Networks
XE
10. Wireless Communications Systems
11. Computer Communication and the Internet
12. Transmission Lines
LI
13. Wave Propagation
14. Antennas
BR
15. Waveguides and Radar
16. Fiber Optics
AR
Y
, hgfds
Beasley/Electronic Communications
Chapter 1: Fundamental Communications Concept
Multiple Choice Questions
LU
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?
A. Transport and Communications Ministry
XE
B. Federal Communications Commission (FCC)
C. International Telecommunication Union (ITU)
D. Bell Laboratories
2. What three ratios do decibels represent?
LI
A. Powers, voltages, currents
B. Powers, voltages, frequencies
C. Voltages, frequencies, impedances
D. Logarithms, voltages, currents
BR
3. Electric and magnetic fields both result from voltage potentials and .
A. Radio frequencies
B. Audio frequencies
C. Current flows
AR
D. Electric charges
4. The carrier is often a(n) .
A. sine wave
B. vector
C. angular frequency
Y
D. amplitude modulation
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
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?
LU
A. Faulty
B. Complete
C. Induced
D. Poor system performance
XE
8. Which of the following is an essential attribute for being an effective troubleshooter?
A. To know the latest trends in noise analysis
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
LI
9. Which of the following is the most troublesome form of external noise?
BR
A. Atmospheric
B. Human-made
C. Space
D. Thermal
10. White noise is directly proportional to both temperature and .
AR
A. bandwidth
B. AC voltage
C. power transfer
D. frequency
11. The overall noise-intensity versus frequency curves for semiconductor devices would
Y
have what type of shape?
A. Angular
B. Square
C. Bathtub
D. Uneven
12. Which of the following did French mathematician Jean Baptiste Joseph Fourier develop?
hgtrfed
