2023 General pool
17 / 429 questions need explanations
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Which HF bands have segments exclusively allocated to Amateur Extra licensees?
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All HF bands (0% chose this)
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80 meters, 40 meters, 20 meters, and 15 meters (0% chose this)
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All HF bands except 160 meters and 10 meters (0% chose this)
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60 meters, 30 meters, 17 meters, and 12 meters (0% chose this)
When may third-party messages be transmitted via remote control?
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Under any circumstances in which third party messages are permitted by FCC rules (0% chose this)
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Under no circumstances except for emergencies (0% chose this)
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Only when the message is intended for licensed radio amateurs (0% chose this)
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Only when the message is intended for third parties in areas where licensing is controlled by the FCC (0% chose this)
Which of the following is good amateur practice for net management?
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Always use multiple sets of phonetics during check-in (0% chose this)
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Have a backup frequency in case of interference or poor conditions (0% chose this)
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Transmit the full net roster at the beginning of every session (0% chose this)
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All these choices are correct (0% chose this)
How often may RACES training drills and tests be routinely conducted without special authorization?
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No more than 1 hour per month (0% chose this)
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No more than 2 hours per month (0% chose this)
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No more than 1 hour per week (0% chose this)
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No more than 2 hours per week (0% chose this)
What is VARA?
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A low signal-to-noise digital mode used for EME (moonbounce) (0% chose this)
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A digital protocol used with Winlink (0% chose this)
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A radio direction finding system used on VHF and UHF (0% chose this)
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DX spotting system using a network of software defined radios (0% chose this)
What symptoms may result from other signals interfering with a PACTOR or VARA transmission?
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Frequent retries or timeouts (0% chose this)
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Long pauses in message transmission (0% chose this)
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Failure to establish a connection between stations (0% chose this)
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All these choices are correct (0% chose this)
What is another name for a Winlink Remote Message Server?
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Terminal Node Controller (0% chose this)
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Gateway (0% chose this)
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RJ-45 (0% chose this)
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Printer/Server (0% chose this)
What is meant by the term “critical frequency” at a given incidence angle?
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The highest frequency which is refracted back to Earth (0% chose this)
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The lowest frequency which is refracted back to Earth (0% chose this)
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The frequency at which the signal-to-noise ratio approaches unity (0% chose this)
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The frequency at which the signal-to-noise ratio is 6 dB (0% chose this)
Which of the following is a common use of the dual-VFO feature on a transceiver?
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To allow transmitting on two frequencies at once (0% chose this)
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To permit full duplex operation -- that is, transmitting and receiving at the same time (0% chose this)
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To transmit on one frequency and listen on another (0% chose this)
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To improve frequency accuracy by allowing variable frequency output (VFO) operation (0% chose this)
In what configuration are the individual cells in a solar panel connected together?
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Series-parallel (0% chose this)
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Shunt (0% chose this)
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Bypass (0% chose this)
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Full-wave bridge (0% chose this)
What precaution should be taken when connecting a solar panel to a lithium iron phosphate battery?
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Ground the solar panel outer metal framework (0% chose this)
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Ensure the battery is placed terminals-up (0% chose this)
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A series resistor must be in place (0% chose this)
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The solar panel must have a charge controller (0% chose this)
Which parameter affects receiver sensitivity?
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Input amplifier gain (0% chose this)
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Demodulator stage bandwidth (0% chose this)
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Input amplifier noise figure (0% chose this)
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All these choices are correct (0% chose this)
Which of these functions is performed by software in a software-defined radio (SDR)?
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Filtering (0% chose this)
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Detection (0% chose this)
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Modulation (0% chose this)
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All these choices are correct (0% chose this)
What is a link budget?
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The financial costs associated with operating a radio link (0% chose this)
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The sum of antenna gains minus system losses (0% chose this)
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The sum of transmit power and antenna gains minus system losses as seen at the receiver (0% chose this)
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The difference between transmit power and receiver sensitivity (0% chose this)
What is link margin?
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The opposite of fade margin (0% chose this)
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The difference between received power level and minimum required signal level at the input to the receiver (0% chose this)
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Transmit power minus receiver sensitivity (0% chose this)
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Receiver sensitivity plus 3 dB (0% chose this)
What must you do if your station fails to meet the FCC RF exposure exemption criteria?
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Perform an RF Exposure Evaluation in accordance with FCC OET Bulletin 65 (0% chose this)
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Contact the FCC for permission to transmit (0% chose this)
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Perform an RF exposure evaluation in accordance with World Meteorological Organization guidelines (0% chose this)
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Use an FCC-approved band-pass filter (0% chose this)
Where should lightning arrestors be located?
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Where the feed lines enter the building (0% chose this)
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On the antenna, opposite the feed point (0% chose this)
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In series with each ground lead (0% chose this)
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At the closest power pole ground electrode (0% chose this)
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