Amateur Technician License Practice Test

These questions are part of the practice quiz. Start practicing

• At which of the following frequencies does maximum permissible exposure have the lowest value?
• What is the Radio Amateur Civil Emergency Service (RACES)?
• What should you do before calling CQ?
• Which is an advantage of using a linked repeater network?
• What is the primary purpose of a dummy load?
• What proves that the FCC has issued an operator/primary license grant?
• How can fundamental overload of a non-amateur radio or TV receiver by an amateur signal be reduced or eliminated?
• What term describes an amateur station that is transmitting and receiving on the same frequency?
• What is a characteristic of HF communication compared with communications on VHF and higher frequencies?
• What is the approximate bandwidth required to transmit a CW signal?
• When using a directional antenna, how might your station be able to communicate with a distant repeater if buildings or obstructions are blocking the direct line of sight path?
• What unit measures electrical power?
• Which of the following is a valid Technician class call sign format?
• Which of the following measurements can be made using a multimeter?
• What is a satellite beacon?
• If your license has expired and is still within the allowable grace period, may you continue to transmit on the amateur radio bands?
• What is a "talkgroup" on a DMR repeater?
• What is meant by "repeater offset"?
• What is the primary purpose of the Amateur Radio Service as defined by the FCC?
• What electrical component opposes the flow of current in a DC circuit?
• What type of component is often used as an adjustable volume control?
• What is Doppler shift in reference to satellite communications?
• What is the maximum peak envelope power output for Technician class operators in their HF band segments?
• What type of electrical component consists of conductive surfaces separated by an insulator?
• What does it indicate if the solder joint is bright and shiny?
• Which term describes the ability of a receiver to discriminate between multiple signals?
• What is an electronic keyer?
• In which type of circuit is DC current the same through all components?
• What reading indicates that an ohmmeter is connected across a large, discharged capacitor?
• Which of the following can result in revocation of the station license or suspension of the operator license?
• What is the Amateur Radio Emergency Service (ARES)?
• Which of the following is true of PL-259 type coax connectors?
• What type of resistor is designed to dissipate more heat than a standard resistor?
• What is the proper function of a control operator at an amateur radio station?
• What is component 3 in figure T-3?
• What is an appropriate power supply rating for a typical 50 watt output mobile FM transceiver?
• How is the cathode lead of a semiconductor diode often marked on the package?
• Electrical power is measured in which of the following units?
• What is the normal term for an FCC-issued amateur radio license?
• What does the term "traffic" refer to in net operation?
• What is the electrical difference between RG-58 and RG-213 coaxial cable?
• Which is equal to 28400 kHz?
• Who may select a desired call sign under the vanity call sign rules?
• What is the main goal of the Net Control Station?
• Are amateur station control operators ever permitted to operate outside the frequency privileges of their license class?
• What is a disadvantage of air core coaxial cable compared to foam or solid dielectric types?
• Which of the following is a disadvantage of FM compared with single sideband?
• What is the primary function of a squelch?
• What is the voltage across a 10-ohm resistor if a current of 1 ampere flows through it?
• What is meant by "check" in a radiogram header?
• What is a grid locator?
• What practice is NOT allowed for an amateur station regarding broadcasting?
• Which of the following are provided by satellite tracking programs?
• What should an amateur station do if it unintentionally transmits interference?
• Which of the following is accurately represented in electrical schematics?
• What happens when antennas at opposite ends of a VHF or UHF line of sight radio link are not using the same polarization?
• Which of the following types of feed line has the lowest loss at VHF and UHF?
• What type of transistor has a gate, drain, and source?
• What is the advantage of having multiple receive bandwidth choices on a multimode transceiver?
• What types of international communications are permitted for an FCC-licensed amateur radio station?
• What does the squelch control help to eliminate?
• What describes the number of times per second that an alternating current makes a complete cycle?
• Which is equal to one kilovolt?
• How is squelch adjusted so that a weak FM signal can be heard?
• Which of the following types of propagation is most commonly associated with occasional strong signals on the 10, 6, and 2 meter bands from beyond the radio horizon?
• What is the approximate velocity of a radio wave in free space?
• Which component allows current to flow in one direction but blocks it in the opposite direction?
• What does an SWR reading of 4:1 indicate?
• What type of circuit is used to control the amount of voltage from a power supply?
• What is the primary purpose of amateur radio frequencies allocated by the FCC?
• What is the name for the flow of electrons in an electric circuit?
• Which of the following types of signal has the narrowest bandwidth?
• What is a common repeater frequency offset in the 2 meter band?
• How does the allowable power density for RF safety change if duty cycle changes from 100 percent to 50 percent?
• Which type of solder should not be used for radio and electronic applications?
• What happens to power lost in a feed line?
• What signals are used in a computer-radio interface for digital mode operation?
• What formula is used to calculate voltage in a circuit?
• What component is combined with an inductor to create a resonant circuit?
• Why are short, heavy-gauge wires used for a transceiver's DC power connection?
• What electrical parameter is controlled by a potentiometer?
• Where should an RF power meter be installed?
• Why do exposure limits vary with frequency?
• How do you calculate the resistance in a circuit if you know voltage and current?
• Which of the following components can consist of three regions of semiconductor material?
• What is the electrical term for the force that causes electron flow?
• What is the definition of third party communications?
• Which of the following is true when installing grounding conductors used for lightning protection?
• Which factor is essential to consider regarding the installation of antennas near power lines?
• Which of the following methods is used to locate sources of noise interference or jamming?
• In which of the following circumstances may the control operator of an amateur station receive compensation for operating that station?
• What are the units of electrical resistance?
• How many milliamperes is 1.5 amperes?
• What does a DMR "code plug" contain?
• What is a transceiver?
• What is the approximate bandwidth of a VHF repeater FM voice signal?
• Why should you not set your transmit frequency to be exactly at the edge of an amateur band or sub-band?
• What frequency range is referred to as VHF?
• What type of electrical component stores energy in a magnetic field?
• What is the voltage across a 2-ohm resistor if a current of 0.5 amperes flows through it?
• What advantage does repeater use provide for amateur operators?
• What can cause erratic changes in SWR?
• Why should you avoid attaching an antenna to a utility pole?
• Which of the following establishes grounding requirements for an amateur radio tower or antenna?
• Who may be the control operator of a station communicating through an amateur satellite or space station?
• Which of the following precautions should be taken when measuring in-circuit resistance with an ohmmeter?
• What is the term that describes a device's ability to amplify a signal?
• Which region of the atmosphere can refract or bend HF and VHF radio waves?
• Which of the following best describes the term "repeaters" in amateur radio?
• Which of the following is used to determine if an antenna is resonant at the desired operating frequency?
• What does the term 'Doppler shift' refer to in satellite communications?
• How may amateurs use the 219 to 220 MHz segment of the 1.25 meter band?
• When the control operator is not the station licensee, who is responsible for the proper operation of the station?
• Electrical current is measured in which of the following units?
• Why should a 5-ampere fuse never be replaced with a 20-ampere fuse?
• Which of the following increases the resonant frequency of a dipole antenna?
• What electronic component allows current to flow in only one direction?
• What is required for remote control operation?
• What is the effect of vegetation on UHF and microwave signals?
• What is the national calling frequency for FM simplex operations in the 2 meter band?
• On which HF bands does a Technician class operator have phone privileges?
• What might be a problem if you receive a report that your audio signal through an FM repeater is distorted or unintelligible?
• What hazard is caused by charging or discharging a battery too quickly?
• Where is an RF preamplifier installed?
• Why are metals generally good conductors of electricity?
• Which of the following is a source of loss in coaxial feed line?
• What device displays an electrical quantity as a numeric value?
• Why are simplex channels designated in the VHF/UHF band plans?
• Which of the following types of antenna offers the greatest gain?
• What property of a radio wave defines its polarization?
• What term describes the use of a sub-audible tone transmitted along with normal voice audio to open the squelch of a receiver?
• What should be done to all external ground rods or earth connections?
• What is the effect of fog and rain on signals in the 10 meter and 6 meter bands?
• What is the minimum safe distance from a power line to allow when installing an antenna?
• Why is coaxial cable the most common feed line for amateur radio antenna systems?
• Which of the following is good practice when installing ground wires on a tower for lightning protection?
• Which of the following can damage a multimeter?
• What can you do if you are told your FM handheld or mobile transceiver is over-deviating?
• Which is equal to 2425 MHz?
• Which is equal to 3.525 MHz?
• What is the function of a component that controls the flow of current?
• Which is equal to 500 milliwatts?
• How does the ionosphere primarily aid in long-distance communication?
• How can you join a digital repeater's "talkgroup"?
• What type of switch is a single-pole single-throw switch?
• What is the function of a transceiver's PTT input?
• Which of the following can provide power gain?
• What is an appropriate way to call another station on a repeater if you know the other station's call sign?
• What is a characteristic of single sideband (SSB) compared to FM?
• Which of the following is a reason to use shielded wire?
• Which of the following describes alternating current?
• What would cause a broadcast AM or FM radio to receive an amateur radio transmission unintentionally?
• What should be considered when selecting an accessory SWR meter?
• Which of the following describes Faraday rotation in radio wave propagation?
• Under which of the following circumstances are one-way transmissions by an amateur station prohibited?
• What is the purpose of the color code used on DMR repeater systems?
• What type of signal does a satellite generally use for data transmission?
• What is a way to enable quick access to a favorite frequency or channel on your transceiver?
• What is the approximate bandwidth of AM fast-scan TV transmissions?
• What electrical component stores energy in an electric field?
• Which of the following are typical duties of a Net Control Station?
• Which is equal to one microvolt?
• What is the formula used to calculate electrical power (P) in a DC circuit?
• In which type of circuit is voltage the same across all components?
• What type of communication is primarily facilitated by the Amateur Radio Service?
• What is the approximate length, in inches, of a half-wavelength 6 meter dipole antenna?
• What is the impact of using excessive effective radiated power on a satellite uplink?
• Which of the following battery chemistries is rechargeable?
• Which of the following describes combining speech with an RF carrier signal?
• What describes the ability to store energy in an electric field?
• What mode of transmission is commonly used by amateur radio satellites?
• What type of communications are amateur stations generally prohibited from conducting?
• Which of the following statements is true regarding DTMF?
• Which of the following is a characteristic of good traffic handling?
• What is the current in a circuit with an applied voltage of 120 volts and a resistance of 80 ohms?
• Which of the following is used to convert a signal from one frequency to another?
• In what situation is an amateur station allowed to transmit emergency communications?
• Which of the following is a safety hazard of a 12-volt storage battery?
• What are the two components of a radio wave?
• When are you required to transmit your assigned call sign?
• How can you determine the length of time that equipment can be powered from a battery?
• What is the FCC Part 97 definition of a beacon?
• What is the primary purpose of the Automatic Gain Control (AGC) in a transceiver?
• What is FT8?
• What is the FCC Part 97 definition of a space station?
• Who selects a Frequency Coordinator?
• What is the primary purpose of CTCSS in radio communications?
• What is required before a Technician class operator can operate a home-built transmitter?
• What is an advantage of a 5/8 wavelength whip antenna for VHF or UHF mobile service?
• What is impedance?
• What is the resistance of a circuit that draws 4 amperes from a 12-volt source?
• What should be the first step to resolve non-fiber optic cable TV interference caused by your amateur radio transmission?
• Which instrument can be used to determine SWR?
• How is over-the-air access to IRLP nodes accomplished?
• What is the Internet Radio Linking Project (IRLP)?
• What is the unit of capacitance?
• What is the maximum length of an HF antenna for a Technician class operator?
• What hazard is created by touching an antenna during a transmission?
• What describes the ability to store energy in a magnetic field?
• What type of transmission is indicated by the term "NTSC"?
• Which agency regulates and enforces the rules for the Amateur Radio Service in the United States?
• Which type of modulation is generally more efficient in terms of bandwidth used?
• What should be checked before using a voltmeter?
• What is a benefit of low SWR?
• Which of the following is an example of automatic control?
• Who must designate the station control operator?
• What types of amateur stations can automatically retransmit the signals of other amateur stations?
• Which component changes 120 V AC power to a lower AC voltage for other uses?
• How many operator/primary station license grants may be held by any one person?
• What is the relationship between wavelength and frequency?
• What is the relationship between the electric and magnetic fields of an electromagnetic wave?
• In which direction does a half-wave dipole antenna radiate the strongest signal?
• In the United States, what circuit does black wire insulation indicate in a three-wire 120 V cable?
• What may happen if the FCC is unable to reach you by email?
• Which type of modulation is commonly used for VHF and UHF voice repeaters?
• What causes a light-emitting diode (LED) to emit light?
• What is a band plan, beyond the privileges established by the FCC?
• What is the approximate bandwidth of a typical single sideband (SSB) voice signal?
• What is the typical frequency range for UHF amateur bands?
• Which of the following is standard practice when you participate in a net?
• Which of the following connections is made between a computer and a transceiver to use computer software when operating digital modes?
• What is the name of a circuit that generates a signal at a specific frequency?
• What is the function of an SPDT switch?
• What type of modulation is commonly used for VHF packet radio transmissions?
• When is it permissible to transmit messages encoded to obscure their meaning?
• What type of component is used to store electrical energy in an electric field?
• Which electrical component is used to increase or decrease AC voltage?
• With which countries are FCC-licensed amateur radio stations prohibited from exchanging communications?
• Which of the following receiver filter bandwidths provides the best signal-to-noise ratio for SSB reception?
• Which of the following self-assigned indicators are acceptable when using a phone transmission?
• How much power is delivered by a voltage of 12 volts DC and a current of 2.5 amperes?
• Who is responsible for ensuring that no person is exposed to RF energy above the FCC exposure limits?
• What is the standard unit for measuring electric current?
• What is component 4 in figure T-1?
• Which of the following battery chemistries is not rechargeable?
• What is the purpose of a safety wire through a turnbuckle used to tension guy lines?
• Which of the following describes a linked repeater network?
• Who may receive telemetry from a space station?
• What is a requirement for the issuance of a club station license grant?
• Which of these conditions could enhance radio wave travel through the atmosphere?
• Which of the following best describes remote control of a station?
• What is the characteristic appearance of a cold tin-lead solder joint?
• Which of the following frequency ranges are available for phone operation by Technician licensees?
• What is the meaning of the procedural signal "CQ"?
• What is the meaning of the term "picket fencing"?
• Which of the following can cause radio frequency interference?
• What is a good way to guard against electrical shock at your station?
• What is the purpose of a fuse in an electrical circuit?
• What is the maximum peak envelope power output for Technician class operators using frequencies above 30 MHz?
• When may amateur radio operators use their stations to notify other amateurs of the availability of equipment for sale or trade?
• When configured to measure current, how is a multimeter connected to a component?
• Which of the following actions can reduce exposure to RF radiation?
• From which of the following locations may an FCC-licensed amateur station transmit?
• What is the major function of an antenna tuner (antenna coupler)?
• What is the primary function of a multimeter?
• Which of the following causes failure of coaxial cables?
• What is the effect of excessive microphone gain on SSB transmissions?
• Which of the following is used to measure voltage?
• What formula is used to calculate current in a circuit?
• What frequency range is referred to as UHF?
• What are the names for the electrodes of a diode?
• Which decibel value most closely represents a power decrease from 12 watts to 3 watts?
• What frequency range is referred to as HF?
• Who does the FCC presume to be the control operator of an amateur station, unless documentation to the contrary is in the station records?
• In amateur radio, what is a "hot spot" typically referring to?
• What is required before an amateur station can operate on a specific frequency?
• What is a LEO satellite?
• What is antenna gain?
• Which of the following is an important safety rule to remember when using a crank-up tower?
• What is the frequency limit for Technician class license operators when operating in the HF bands?
• What type of propagation allows over-the-horizon VHF and UHF communications to ranges of approximately 300 miles regularly?
• Which of the following describes a type of antenna loading?
• What type of current flow is opposed by resistance?
• Why do VHF signal strengths sometimes vary greatly when the antenna is moved only a few feet?
• What is the required qualification for obtaining a General Class amateur radio license?
• Which of the following could be the reason you are unable to access a repeater whose output you can hear?
• What type of phenomena is knife-edge diffraction?
• Which of the following precautions should be taken when measuring high voltages with a voltmeter?
• What is the primary concern regarding safety when constructing or using amateur radio towers?
• What is a recommended method for ensuring safety while working on antennas?
• Which of the following is an example of remote control as defined in Part 97?
• When may a Technician class licensee be the control operator of a station operating in an Amateur Extra Class band segment?
• What electrical component is typically constructed as a coil of wire?
• When is generally the best time for long-distance 10 meter band propagation via the F region?
• What is a disadvantage of using a handheld VHF transceiver with a flexible antenna inside a vehicle?
• What is the function of the SSB/CW-FM switch on a VHF power amplifier?
• Which of the following RF connector types is most suitable for frequencies above 400 MHz?
• What does the term "VOX" refer to in amateur radio equipment?
• What is the effect of increasing the impedance in an AC circuit?
• Which is true about forward voltage drop in a diode?
• Which of the following conductors is preferred for bonding at RF?
• Which of the following is a way to determine whether your satellite uplink power is neither too low nor too high?
• Which is a proper grounding method for a tower?
• What is a disadvantage of the short, flexible antenna supplied with most handheld radio transceivers, compared to a full-sized quarter-wave antenna?
• Where should a lightning arrester be installed in a coaxial feed line?
• What is component 9 in figure T-2?
• Which decibel value represents a power increase from 20 watts to 200 watts?
• Which is equal to 3000 milliamperes?
• What information is contained in the preamble of a formal traffic message?
• What is component 8 in figure T-2?
• How is a VHF/UHF transceiver's "reverse" function used?
• When may amateur stations transmit information in support of broadcasting, program production, or news gathering, assuming no other means is available?
• When is willful interference to other amateur radio stations permitted?
• How much power is delivered by a voltage of 13.8 volts DC and a current of 10 amperes?
• What technique is used to ensure that voice messages containing unusual words are received correctly?
• Which of the following describes DMR?
• What, if any, are the restrictions concerning transmission of language that may be considered indecent or obscene?
• Which of the following is commonly used as a visual indicator?
• What is the main purpose of a crossband repeater?
• What is the grace period for renewal if an amateur license expires?
• What is the current through a 24-ohm resistor connected across 240 volts?
• Which device changes an alternating current into a varying direct current signal?
• Which type of voice mode is often used for long-distance (weak signal) contacts on the VHF and UHF bands?
• Which of the following can be used to enter a transceiver's operating frequency?
• How are the transceiver audio input and output connected in a station configured to operate using FT8?
• Which of the following is an application of APRS?
• What type of signal do LEDs primarily operate with?
• In net operation, what does the term "check-in" refer to?
• Under what circumstances is it safe to climb a tower without a helper or observer?
• What effect does multi-path propagation have on data transmissions?
• What frequency range is typical for amateur radio operations?
• What language may you use for identification when operating in a phone sub-band?
• What is CW?
• How does RF radiation differ from ionizing radiation (radioactivity)?
• Which instrument would you use to measure electric potential?
• What term describes the ability of a receiver to detect the presence of a signal?
• What is the name of an electrical wiring diagram that uses standard component symbols?
• Which of the following best describes an amateur radio mesh network?
• What is another term for a multimeter?
• Which is equal to 1,500,000 hertz?
• Which bands may provide long-distance communications via the ionosphere's F region at the peak of the sunspot cycle?
• What is the primary function of a capacitor in an electrical circuit?
• How can you make sure your station stays in compliance with RF safety regulations?
• What is component 1 in figure T-1?
• Which of the following controls could be used if the voice pitch of a single-sideband signal returning to your CQ call seems too high or low?
• What is the name of a device that combines several semiconductors and other components into one package?
• When do FCC rules NOT apply to the operation of an amateur station?
• What should you do if something in a neighbor's home is causing harmful interference to your amateur station?
• What causes spin fading of satellite signals?
• What is component 4 in figure T-3?
• What factor primarily affects antenna performance at higher frequencies?
• What is the velocity of a radio wave traveling through free space?
• What is the main purpose of a club station trustee?
• What is Voice Over Internet Protocol (VoIP)?
• What is component 6 in figure T-2?
• What type of signaling uses pairs of audio tones?
• In electrical terms, what does AC stand for?
• What is component 3 in figure T-1?
• What is the unit of frequency?
• Which of the following operating activities is supported by digital mode software in the WSJT-X software suite?
• Which decibel value most closely represents a power increase from 5 watts to 10 watts?
• What is an ARQ transmission system?
• For which license classes are new licenses currently available from the FCC?
• Which of the following is included in packet radio transmissions?
• Which of these items would be useful for a hidden transmitter hunt?
• What is a symptom of RF feedback in a transmitter or transceiver?
• What should be done before climbing a tower?
• Which of the following are inputs to a satellite tracking program?
• Which of the following is a digital communications mode?
• What antenna polarization is normally used for long-distance CW and SSB contacts on the VHF and UHF bands?
• When may an amateur station transmit without identifying on the air?
• Which amateur band includes 146.52 MHz?
• What is the proper way to communicate with another amateur operator using a repeater?
• What hazard exists in a power supply immediately after turning it off?
• Where should a fuse or circuit breaker be installed in a 120V AC power circuit?
• Which segment of the amateur radio bands is exclusively reserved for Technician class operators?
• What is a characteristic of VHF signals received via auroral backscatter?
• What function is performed with a transceiver and a digital mode hot spot?
• Which frequency band is commonly used for local VHF communications?
• Which of the following best describes a transistor?
• What is the abbreviation for megahertz?
• What is a relay?
• What is a beam antenna?
• Which of these components can be used as an electronic switch?
• What is meant by the statement that a satellite is operating in U/V mode?
• Which term describes the rate at which electrical energy is used?
• How soon after passing the examination for your first amateur radio license may you transmit on the amateur radio bands?
• Why do most solid-state transmitters reduce output power as SWR increases beyond a certain level?
• What operating activity involves contacting as many stations as possible during a specified period?
• What do the FCC rules state regarding the use of a phonetic alphabet for station identification in the Amateur Radio Service?
• Which of the following is good procedure when contacting another station in a contest?
• What device converts the RF input and output of a transceiver to another band?
• Which Q signal indicates that you are changing frequency?
• Why is the radio horizon for VHF and UHF signals more distant than the visual horizon?
• What does the abbreviation "PSK" mean?
• What is the relationship between watts, volts, and amperes?
• What restriction must be followed when a non-licensed person speaks to a foreign station using an amateur station under the control of a licensed operator?
• What reading on an SWR meter indicates a perfect impedance match between the antenna and the feed line?
• Which frequency is in the 6 meter amateur band?
• What does an increase in frequency represent in terms of wave phenomena?
• When must the station and its records be available for FCC inspection?
• Why is duty cycle one of the factors used to determine safe RF radiation exposure levels?
• Which of the following is part of the Basis and Purpose of the Amateur Radio Service?
• What kind of data can be transmitted by APRS?
• What is an amateur radio station that connects other amateur stations to the internet?
• Which of the following VHF/UHF band segments are limited to CW only?
• What is standing wave ratio (SWR)?
• What is the primary purpose of a VHF repeater?
• What is the most common impedance of coaxial cables used in amateur radio?
• What tool can be used to determine the location of an amateur radio signal?
• Which of the following describes electrical resistance?
• Who can participate in ARES?
• Which band is best suited for communicating via meteor scatter?
• What is a common use for HF frequencies?
• What is RACES?
• How is a specific group of stations selected on a digital voice transceiver?
• What would cause your FM transmission audio to be distorted on voice peaks?
• Which component is primarily responsible for controlling current in a circuit?
• Where may SSB phone be used in amateur bands above 50 MHz?
• What device increases the transmitted output power from a transceiver?
• What factors affect the RF exposure of people near an amateur station antenna?
• Why are simplex UHF signals rarely heard beyond their radio horizon?
• How are US amateurs restricted in segments of bands where the Amateur Radio Service is secondary?
• Under what conditions is an amateur station authorized to transmit music using a phone emission?
• What weather condition might decrease range at microwave frequencies?
• Which of the following can reduce overload of a VHF transceiver by a nearby commercial FM station?
• What causes tropospheric ducting?
• What is required when climbing an antenna tower?
• What does the scanning function of an FM transceiver do?
• What is component 2 in figure T-1?
• What is the result of tuning an FM receiver above or below a signal's frequency?
• Which of the following could you use to cure distorted audio caused by RF current on the shield of a microphone cable?
• Which statement is true about amateur radio equipment?
• What type of amateur station simultaneously retransmits the signal of another amateur station on different channels?
• What is a likely cause of irregular fading of signals propagated by the ionosphere?
• Which is equal to 1,000,000 picofarads?
• What electrical component is used to protect other circuit components from current overloads?
• What does the abbreviation FET stand for?
• Which of the following is a form of amplitude modulation?
• Where should the negative power return of a mobile transceiver be connected in a vehicle?
• Which of the following is a good electrical insulator?
• In addition to frequency, which of the following is used to identify amateur radio bands?
• What is the approximate length, in inches, of a quarter-wavelength vertical antenna for 146 MHz?
• What is the purpose of using a phonetic alphabet in communication?
• What happens if you talk too loudly into a microphone during FM transmission?
• Which amateurs may contact the International Space Station (ISS) on VHF bands?
• What formula is used to calculate resistance in a circuit?
• Which of the following must be programmed into a D-STAR digital transceiver before transmitting?
• Which component is often used to limit current within a circuit?
• What telemetry information is typically transmitted by satellite beacons?
• Which of the following describes a simple dipole oriented parallel to Earth's surface?
• Who is responsible if a repeater inadvertently retransmits communications that violate FCC rules?
• Which of the following entities recommends transmit/receive channels and other parameters for auxiliary and repeater stations?
• What is the resistance of a circuit in which a current of 3 amperes flows when connected to 90 volts?
• How is a voltmeter connected to a component to measure applied voltage?
• What is a common repeater frequency offset in the 70 cm band?
• Which of the following protocols enables an amateur station to transmit through a repeater without using a radio to initiate the transmission?
• Why should the outer jacket of coaxial cable be resistant to ultraviolet light?
• Which Q signal indicates that you are receiving interference from other stations?
• How does the FCC define broadcasting for the Amateur Radio Service?
• What does a dummy load consist of?
• What device is used to open or close an electrical circuit?
• What is the definition of duty cycle during the averaging time for RF exposure?
• Which of the following results from the fact that signals propagated by the ionosphere are elliptically polarized?
• How often must you identify with your FCC-assigned call sign when using tactical call signs?
• Which instrument is used to measure electric current?
• What is the role of the control operator at an amateur station?
• How should you respond to a station calling CQ?
• When may an amateur station transmit without a control operator?
• What method of call sign identification is required for a station transmitting phone signals?
• What is the resistance of a circuit for which the applied voltage is 12 volts and the current flow is 1.5 amperes?
• What type of radiation are radio signals?
• What happens as the frequency of a signal in coaxial cable is increased?
• What does a transformer do in a circuit?
• What health hazard is presented by electrical current flowing through the body?
• What is the abbreviation for kilohertz?
• Which effect allows radio signals to travel beyond obstructions between transmitting and receiving stations?
• What are the names of the electrodes of a bipolar junction transistor?
• 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?
• What is the unit of impedance?
• According to FCC rules, how long must communication records be retained?
• What does the abbreviation "RF" mean?
• Which of the following indicates that a station is listening on a repeater and looking for a contact?
• What is an amateur station's control point?
• Which of the following applies when two stations transmitting on the same frequency interfere with each other?
• What is the current through a 100-ohm resistor connected across 200 volts?
• What is the unit of inductance?
• What is the frequency range for VHF communications typically involving amateur radio?
• Which of the following represents a resonant or tuned circuit?
• Which band is typically used for local communications in urban areas?
• Which of the following is an acceptable method to determine whether your station complies with FCC RF exposure regulations?
• What is the significance of the term "tone squelch" in radio communications?
• What determines the transmitting frequency privileges of an amateur station?
• Which sideband is normally used for 10 meter HF, VHF, and UHF single-sideband communications?
• What is required before using the EchoLink system?
• Which of the following is an important safety precaution to observe when putting up an antenna tower?
• How can you safely measure high voltage with a multimeter?