SOLVED

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? A. Transport and Communications Ministry B. Federal Communications Commission (FCC) C. International Telecommunication Union (ITU) D. Bell Laboratories 2.What three ratios do decibels represent? A.Powers, voltages, currents B.Powers, voltages, frequencies C.Voltages, frequencies, impedances D.Logarithms, voltages, currents 3.Electric and magnetic fields both result from voltage potentials and _________. A. Radio frequencies B. Audio frequencies C. Current flows D. Electric charges 4.The carrier is often a(n) _____________. A.sine wave B.vector C.angular frequency 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 6.What two factors limit all communication systems? A.Bandwidth and noise 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? A.Faulty B.Complete 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 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 B.Human-made C.Space D.Thermal 10.White noise is directly proportional to both temperature and _____________. A.bandwidth B.AC voltage C.power transfer D.frequency 1