Technician Class License Exam Questions

Subelement T7

Station equipment: common transmitter and receiver problems; antenna measurements; troubleshooting; basic repair and testing

Question Display Options:
Group T7A Station equipment: receivers; transmitters; transceivers; modulation; transverters; low power and weak signal operation; transmit and receive amplifiers
T7A01 Which term describes the ability of a receiver to detect the presence of a signal?
T7A02 What is a transceiver?
T7A03 Which of the following is used to convert a radio signal from one frequency to another?
T7A04 Which term describes the ability of a receiver to discriminate between multiple signals?
T7A05 What is the name of a circuit that generates a signal of a desired frequency?
T7A06 What device takes the output of a low-powered 28 MHz SSB exciter and produces a 222 MHz output signal?
T7A07 What is meant by term “PTT”?
T7A08 Which of the following describes combining speech with an RF carrier signal?-
T7A09 Which of the following devices is most useful for VHF weak-signal communication?
T7A10 What device increases the low-power output from a handheld transceiver?
T7A11 Where is an RF preamplifier installed?
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Group T7B Common transmitter and receiver problems: symptoms of overload and overdrive; distortion; causes of interference; interference and consumer electronics; part 15 devices; over and under modulation; RF feedback; off frequency signals; fading and noise; problems with digital communications interfaces
T7B01 What can you do if you are told your FM handheld or mobile transceiver is over-deviating?
T7B02 What would cause a broadcast AM or FM radio to receive an amateur radio transmission unintentionally?
T7B03 Which of the following may be a cause of radio frequency interference?
T7B04 Which of the following is a way to reduce or eliminate interference by an amateur transmitter to a nearby telephone?
T7B05 How can overload of a non-amateur radio or TV receiver by an amateur signal be reduced or eliminated?
T7B06 Which of the following actions should you take if a neighbor tells you that your station's transmissions are interfering with their radio or TV reception?
T7B07 Which of the following may be useful in correcting a radio frequency interference problem?
T7B08 What should you do if something in a neighbor's home is causing harmful interference to your amateur station?
T7B09 What is a Part 15 device?
T7B10 What might be the problem if you receive a report that your audio signal through the repeater is distorted or unintelligible?
T7B11 What is a symptom of RF feedback in a transmitter or transceiver?
T7B12 What might be the first step to resolve cable TV interference from your ham radio transmission?
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Group T7C Antenna measurements and troubleshooting: measuring SWR; dummy loads; coaxial cables; feed line failure modes
T7C01 What is the primary purpose of a dummy load?
T7C02 Which of the following instruments can be used to determine if an antenna is resonant at the desired operating frequency?
T7C03 What, in general terms, is standing wave ratio (SWR)?
T7C04 What reading on an SWR meter indicates a perfect impedance match between the antenna and the feed line?
T7C05 What is the approximate SWR value above which the protection circuits in most solid-state transmitters begin to reduce transmitter power?
T7C06 What does an SWR reading of 4:1 indicate?
T7C07 What happens to power lost in a feed line?
T7C08 What instrument other than an SWR meter could you use to determine if a feed line and antenna are properly matched?
T7C09 Which of the following is the most common cause for failure of coaxial cables?
T7C10 Why should the outer jacket of coaxial cable be resistant to ultraviolet light?
T7C11 What is a disadvantage of air core coaxial cable when compared to foam or solid dielectric types?
T7C12 Which of the following is a common use of coaxial cable?
T7C13 What does a dummy load consist of?
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Group T7D Basic repair and testing: soldering; using basic test instruments; connecting a voltmeter, ammeter, or ohmmeter
T7D01 Which instrument would you use to measure electric potential or electromotive force?
T7D02 What is the correct way to connect a voltmeter to a circuit?
T7D03 How is an ammeter usually connected to a circuit?
T7D04 Which instrument is used to measure electric current?
T7D05 What instrument is used to measure resistance?
T7D06 Which of the following might damage a multimeter?
T7D07 Which of the following measurements are commonly made using a multimeter?
T7D08 Which of the following types of solder is best for radio and electronic use?
T7D09 What is the characteristic appearance of a cold solder joint?
T7D10 What is probably happening when an ohmmeter, connected across an unpowered circuit, initially indicates a low resistance and then shows increasing resistance with time?
T7D11 Which of the following precautions should be taken when measuring circuit resistance with an ohmmeter?
T7D12 Which of the following precautions should be taken when measuring high voltages with a voltmeter?
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