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Ham Radio General practice questions

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Question 1Commission's Rules

Which agency is the source of the rules governing amateur radio in the United States?

  1. The Department of Commerce
  2. The Federal Communications Commission Correct answer.
  3. The National Telecommunications Bureau
  4. The American Radio Relay League

Explanation

The FCC administers the Communications Act and issues the Part 97 rules that govern the amateur service. The ARRL is a private membership organization and has no rulemaking authority.

Question 2Commission's Rules

What is the maximum transmitter power output a General class licensee may use on the 2 meter band?

  1. 50 watts PEP
  2. 100 watts PEP
  3. 1500 watts PEP Correct answer.
  4. 200 watts PEP

Explanation

General, Advanced, and Amateur Extra licensees share the same power limit of 1500 watts PEP on the VHF and UHF bands, subject to minimum necessary power practice. Technician licensees are limited on some bands but not on 2 meters.

Question 3Commission's Rules

How often must an amateur station transmit its assigned call sign during a communication?

  1. At least every 10 minutes and at the end of the communication Correct answer.
  2. Only when requested by another station
  3. At least every 15 minutes only
  4. Only at the start of the contact

Explanation

Part 97 requires station identification at least every 10 minutes during a communication and at the end of the communication. This applies to phone, CW, and digital modes alike.

Question 4Commission's Rules

What frequency range is authorized for General class operation on the 80 meter band?

  1. 3.600 to 3.700 MHz
  2. 3.500 to 3.525 MHz
  3. 3.800 to 4.000 MHz
  4. 3.525 to 3.600 MHz Correct answer.

Explanation

General class licensees may use the 80 meter band from 3.525 to 3.600 MHz, with mode subbands within that range. The lower segment is reserved for Amateur Extra and Advanced class licensees.

Question 5Commission's Rules

An amateur station is transmitting on 14.200 MHz. Which license class privilege applies to that frequency?

  1. Only Amateur Extra licensees may use it
  2. No amateur licensee may use it
  3. General, Advanced, and Amateur Extra licensees may use it Correct answer.
  4. Only Technician and General licensees may use it

Explanation

The 20 meter band from 14.150 to 14.225 MHz is available to General, Advanced, and Amateur Extra licensees. Technician licensees do not have 20 meter phone privileges.

Question 6Commission's Rules

What must a General class licensee do before transmitting on a frequency in a band where the licensee holds privileges but a higher class holds part of the band?

  1. Operate anywhere on the band as long as power is limited
  2. Request permission from the FCC each time
  3. Use only CW on any restricted segment
  4. Operate only within the frequency segments authorized for the General class Correct answer.

Explanation

Privileges are defined by frequency segment and mode, not by the band as a whole. A General class licensee may transmit only within the subbands assigned to that class. Operating in higher-class segments is not permitted.

Question 7Commission's Rules

Which of these is a permitted one-way transmission in the amateur service?

  1. Routine Morse code practice bulletins to unidentified listeners
  2. Music transmissions for entertainment
  3. Commercial advertisements for a sponsor
  4. Emergency communications during a declared emergency Correct answer.

Explanation

One-way transmissions are generally prohibited, but Part 97 allows exceptions including emergency communications and certain information bulletins. Routine entertainment and commercial content remain prohibited.

Question 8Commission's Rules

What is the required content of an amateur station identification?

  1. The license class of the control operator
  2. The operator's full legal name
  3. The station's geographic grid square
  4. The station's assigned call sign Correct answer.

Explanation

Identification consists of transmitting the assigned call sign using the mode in use. Names, grid squares, and license class are not required elements of the identification.

Question 9Commission's Rules

A General class licensee is the control operator of a station transmitting on 10 meters at 28.500 MHz. Which statement is accurate?

  1. Transmission is prohibited because 28.500 MHz is CW-only
  2. Transmission is prohibited because 10 meters is Technician-only
  3. Transmission is permitted because 28.500 MHz is within General class phone privileges Correct answer.
  4. Transmission is permitted only if the station is portable

Explanation

The 10 meter band from 28.300 to 29.700 MHz is available to General, Advanced, and Amateur Extra licensees for phone. 28.500 MHz falls in that segment.

Question 10Commission's Rules

What is the minimum age requirement for an amateur radio license?

  1. 12 years
  2. 14 years
  3. 16 years
  4. There is no minimum age Correct answer.

Explanation

The FCC imposes no minimum age for any amateur license class. Any person who passes the required examination may be licensed.

Question 11Commission's Rules

How long is an amateur station license normally valid?

  1. Lifetime
  2. 5 years
  3. 10 years Correct answer.
  4. 2 years

Explanation

Amateur licenses are issued for a term of 10 years and may be renewed. Renewal may be requested within 90 days before expiration.

Question 12Commission's Rules

Within what period before license expiration may an amateur apply for renewal?

  1. 90 days Correct answer.
  2. 365 days
  3. 180 days
  4. 30 days

Explanation

The FCC permits renewal filing beginning 90 days before the license expiration date. Filing earlier than that window is not accepted for routine renewal.

Question 13Commission's Rules

An amateur's license expired 18 months ago and the licensee has not renewed it. What is the status of operating privileges?

  1. The licensee may operate only on VHF bands
  2. The licensee may not transmit until the license is renewed or a new license is granted Correct answer.
  3. The licensee may continue operating indefinitely under the expired call sign
  4. The licensee may operate only during emergencies

Explanation

Operating authority ends when the license expires. There is a two-year grace period during which the license may be reinstated without retesting, but transmission is not permitted until it is reinstated.

Question 14Commission's Rules

What is the maximum penalty the FCC may impose on a licensee for a willful rule violation?

  1. A warning letter only
  2. A fine and license revocation or suspension Correct answer.
  3. Mandatory retesting only
  4. Loss of call sign for 30 days

Explanation

The FCC may impose monetary forfeitures and may revoke or suspend a license for willful or repeated violations. Warning letters and retesting are not the maximum remedies.

Question 15Commission's Rules

Which of the following transmissions is prohibited in the amateur service?

  1. Transmissions intended to obscure the meaning of a message Correct answer.
  2. Transmissions on frequencies above 50 MHz
  3. Transmissions using digital modes
  4. Transmissions during a declared emergency

Explanation

Part 97 prohibits transmissions that are encoded to obscure meaning, except for control signals and certain permitted applications. Digital modes and VHF/UHF operation are permitted, and emergency communications are encouraged.

Question 16Commission's Rules

A station is transmitting a message that includes a coded signal intended to conceal its meaning from other amateurs. Which rule applies?

  1. The transmission is permitted if all parties are licensed
  2. The transmission is permitted on VHF only
  3. The transmission is permitted if the station identifies every 10 minutes
  4. The transmission is prohibited because messages must not be obscured Correct answer.

Explanation

Amateur communications must be understandable to other amateurs; obscuring meaning is prohibited except for specifically permitted control and telemetry signals. Identification or licensing of the parties does not cure the violation.

Question 17Commission's Rules

Which best describes the rule on compensation for amateur communications?

  1. Amateur stations may not transmit for hire or material compensation, with limited exceptions Correct answer.
  2. Amateur stations may broadcast paid announcements
  3. Amateur stations may charge for equipment installation
  4. Amateur stations may accept payment for any message handled

Explanation

Part 97 generally prohibits transmitting for compensation, with narrow exceptions such as emergency communications and certain classroom instruction. Paid message handling and advertising are not permitted.

Question 18Commission's Rules

What is the required station identification when operating through a repeater?

  1. Identification is not required on repeaters
  2. Only the repeater must identify
  3. Only the control operator must identify
  4. Both the control operator and the repeater must identify as required Correct answer.

Explanation

The transmitting station must identify at least every 10 minutes and at the end of the communication, and the repeater itself must also identify. Neither obligation replaces the other.

Question 19Commission's Rules

Which statement correctly describes third-party communications under Part 97?

  1. A third party must hold an Amateur Extra license
  2. A third party may participate if the control operator is present and the message is not for business purposes Correct answer.
  3. A third party may use the station without a control operator present
  4. A third party may conduct business traffic on HF

Explanation

Third-party traffic is permitted when a licensed control operator is present and the communication is not business-related, subject to additional restrictions for international traffic. The third party need not be licensed.

Question 20Commission's Rules

What is the purpose of the amateur service as defined by the FCC?

  1. Advancing skills and providing emergency communications without pecuniary interest Correct answer.
  2. Operating public safety dispatch networks
  3. Providing commercial broadcasting services
  4. Selling radio equipment to the public

Explanation

The amateur service exists for self-training, intercommunication, and technical investigation, with a recognized emergency communications role, and must be conducted without pecuniary interest. Commercial and public safety functions belong to other services.

Question 21Operating Procedures

When operating on the 20-meter band, which frequency range is authorized for General class operators using phone (voice) emissions?

  1. 14.350 MHz to 14.500 MHz
  2. 14.025 MHz to 14.150 MHz
  3. 14.000 MHz to 14.025 MHz
  4. 14.150 MHz to 14.350 MHz Correct answer.

Explanation

The 20-meter phone subband for General, Advanced, and Amateur Extra licensees runs from 14.150 MHz to 14.350 MHz. Frequencies below 14.150 MHz on 20 meters are limited to narrow-band modes such as CW and data.

Question 22Operating Procedures

What is the standard repeater offset direction and magnitude for a 2-meter FM repeater operating above 147 MHz?

  1. Minus 5 MHz
  2. Plus 600 kHz Correct answer.
  3. Plus 5 MHz
  4. Minus 600 kHz

Explanation

On the 2-meter band, repeaters with output frequencies above 147 MHz use a positive 600 kHz offset; those below 147 MHz use a negative offset. The 5 MHz offset applies to the 70-centimeter band.

Question 23Operating Procedures

What does the term "simplex" mean when describing an amateur VHF contact?

  1. One station transmits only while the other receives only
  2. Both stations transmit on one frequency and receive on another
  3. Both stations transmit and receive on the same frequency Correct answer.
  4. Communications are relayed through a repeater

Explanation

Simplex operation means both stations use a single shared frequency, transmitting and receiving on it in turn. Duplex operation, by contrast, uses separate transmit and receive frequencies, as with a repeater.

Question 24Operating Procedures

Which Q signal indicates that a station is changing frequency to avoid interference?

  1. QSY Correct answer.
  2. QTH
  3. QRM
  4. QSL

Explanation

QSY means "change frequency" and is used to announce that a station is moving to a different frequency. The other signals cover confirmation, interference, and location.

Question 25Operating Procedures

What is the purpose of the RST system in amateur radio?

  1. To log the time and date of each contact
  2. To assign a callsign to a new licensee
  3. To report signal readability, strength, and tone Correct answer.
  4. To measure transmitter output power

Explanation

The RST system gives a concise report of a received signal: Readability on a scale of 1 to 5, Strength on 1 to 9, and Tone on 1 to 9 for CW. Phone contacts typically use only the R and S portions.

Question 26Operating Procedures

Which of these is the proper way to call a specific station on a repeater?

  1. Say the other station's callsign, then your own callsign Correct answer.
  2. Say "CQ" followed by the repeater callsign
  3. Say your own callsign, then the other station's callsign
  4. Say only the other station's callsign

Explanation

To call a specific station, transmit the other station's callsign first, followed by your own. This lets the called station recognize the call immediately and identifies you as required.

Question 27Operating Procedures

An operator wants to use a 2-meter repeater whose output is 146.940 MHz. Which transmit frequency should the radio be set to for the standard offset?

  1. 146.940 MHz
  2. 145.940 MHz
  3. 147.540 MHz
  4. 146.340 MHz Correct answer.

Explanation

A 2-meter repeater below 147 MHz uses a negative 600 kHz offset, so the input is 0.6 MHz below the output. Subtracting 0.600 from 146.940 gives 146.340 MHz.

Question 28Operating Procedures

What is the meaning of the procedural signal "CQ"?

  1. A signal indicating an emergency
  2. A general call to any station Correct answer.
  3. An instruction to change frequency
  4. A request to repeat the last transmission

Explanation

CQ is a general call inviting any station that hears it to respond. It is typically followed by "this is" and the calling station's callsign.

Question 29Operating Procedures

Why should a station pause briefly between transmissions on a repeater?

  1. To let the repeater cool down between transmissions
  2. To comply with a required one-minute silent period
  3. To allow the repeater's timer and other stations to reset or break in Correct answer.
  4. To give the receiver time to change frequency

Explanation

Pausing allows the repeater controller to reset its timeout timer and lets other stations with emergency or priority traffic break in. It also confirms that the repeater has dropped and is ready for the next transmission.

Question 30Operating Procedures

What information must a station transmit at least every ten minutes during a contact, and at the end of the contact?

  1. Its assigned callsign Correct answer.
  2. Its receiver model
  3. Its transmitter power level
  4. Its location and antenna type

Explanation

Amateur stations must identify with their assigned callsign at least every ten minutes while transmitting and at the end of the communication. Location, power, and equipment details are not required for identification.

Question 31Operating Procedures

An operator hears a station calling CQ on a frequency already in use by a nearby conversation. What is the appropriate action?

  1. Respond immediately to claim the frequency
  2. Transmit a warning tone to clear the channel
  3. Wait for the frequency to clear before responding Correct answer.
  4. Report the calling station to the FCC

Explanation

Amateur practice is to listen before transmitting and avoid interfering with ongoing communications. The calling station likely did not hear the existing conversation, so waiting is courteous and proper.

Question 32Operating Procedures

What does the term "third-party traffic" refer to in amateur radio?

  1. A contact involving three or more amateur stations
  2. A message sent during a contest
  3. A message sent by an amateur on behalf of another person Correct answer.
  4. Traffic relayed through a repeater

Explanation

Third-party traffic is a message passed by a licensed amateur on behalf of a person who is not a licensed amateur. International third-party rules depend on the countries involved.

Question 33Operating Procedures

Which of these is the correct way to respond to a distress call on an amateur frequency?

  1. Change frequency to avoid the emergency
  2. Log the call and report it later
  3. Continue your contact to avoid confusion
  4. Acknowledge the call and offer assistance while yielding the frequency Correct answer.

Explanation

Stations hearing a distress call should acknowledge it, offer whatever assistance is possible, and keep the frequency clear for emergency traffic. Normal communications must yield to distress traffic.

Question 34Operating Procedures

A station wishes to use a repeater that requires a CTCSS tone. What is the purpose of that tone?

  1. To encrypt the voice transmission
  2. To identify the user's callsign automatically
  3. To prevent interference from reaching the repeater receiver Correct answer.
  4. To increase the transmitter's output power

Explanation

A CTCSS tone is a subaudible signal that the repeater must detect before it will retransmit, which reduces interference from stations that lack the tone. It does not encrypt audio or identify the operator.

Question 35Operating Procedures

What is the primary purpose of a net on an amateur frequency?

  1. To organize and pass messages among stations in a structured way Correct answer.
  2. To measure propagation conditions
  3. To test antenna performance
  4. To assign new callsigns

Explanation

A net is an organized activity in which a net control station directs communications and traffic among participants. Nets are used for emergencies, public service, and regular information exchange.

Question 36Operating Procedures

An operator plans to operate from a location where the repeater's input is 146.340 MHz and output is 146.940 MHz. Which offset setting should the radio use?

  1. Plus offset
  2. Split with the transmit above the receive
  3. Simplex
  4. Minus offset Correct answer.

Explanation

Because the repeater's input (146.340 MHz) is lower than its output (146.940 MHz), the radio must transmit below its receive frequency, which is a minus offset. The standard 600 kHz spacing confirms this.

Question 37Operating Procedures

A General class operator wants to work SSB phone on 40 meters during the evening. Which frequency is authorized for that mode and license class?

  1. 7.010 MHz
  2. 7.005 MHz
  3. 7.050 MHz
  4. 7.200 MHz Correct answer.

Explanation

General class operators may use phone on 40 meters from 7.175 MHz to 7.300 MHz. Frequencies below 7.125 MHz on 40 meters are limited to CW and narrow-band data.

Question 38Operating Procedures

An operator hears an unidentified station transmitting music and profanity on a 2-meter simplex frequency. What is the most appropriate response?

  1. Argue with the station until it stops
  2. Match the station's behavior to discourage it
  3. Transmit a stronger signal to overpower the station
  4. Avoid engaging and continue operating properly elsewhere Correct answer.

Explanation

The proper response to improper or unidentified transmissions is to avoid engaging and continue operating in accordance with the rules. Responding in kind or escalating only prolongs the disruption.

Question 39Operating Procedures

A station is transmitting on a repeater and the controller times out, cutting off the transmission. What is the most likely cause?

  1. The station's antenna was mismatched
  2. The repeater's output power dropped
  3. The CTCSS tone was too strong
  4. The transmission exceeded the repeater's timeout timer Correct answer.

Explanation

Repeater controllers use a timeout timer to limit continuous transmissions and free the channel. Exceeding that limit causes the controller to stop retransmitting until the input drops.

Question 40Operating Procedures

During a directed net, a station needs to leave early. What is the proper procedure?

  1. Ask another station to relay the message later
  2. Check with net control before securing Correct answer.
  3. Simply stop transmitting without notice
  4. Announce to all stations simultaneously

Explanation

In a directed net, net control coordinates all transmissions, so a station wishing to leave should check out with net control before securing. This keeps the net orderly and informs the control operator of the station's status.

Question 41Radio Wave Propagation

Which layer of the ionosphere is primarily responsible for long-distance HF skywave communication at night, when D-layer absorption fades?

  1. The F layer Correct answer.
  2. The D layer
  3. The E layer
  4. The troposphere

Explanation

The F layer (often splitting into F1 and F2 by day) is the highest region and persists at night, refracting HF signals back to Earth for long-distance paths. The D layer largely disappears after sunset, removing most absorption.

Question 42Radio Wave Propagation

What is the primary cause of the daily variation in the height and density of the ionosphere?

  1. Variation in solar ultraviolet and X-ray radiation reaching the atmosphere Correct answer.
  2. Seasonal shifts in the planet's axial tilt alone
  3. Tidal forces from the Moon
  4. Cyclical changes in Earth's magnetic field strength

Explanation

Solar radiation ionizes the upper atmosphere, so ionization rises with daylight and falls at night. The Sun's changing elevation drives the daily cycle of layer density and height.

Question 43Radio Wave Propagation

What does the term maximum usable frequency (MUF) describe for a given ionospheric path?

  1. The frequency of strongest ground-wave propagation
  2. The highest frequency that will be refracted back to Earth over that path Correct answer.
  3. The lowest frequency that avoids D-layer absorption
  4. The frequency at which the ionosphere absorbs the most energy

Explanation

MUF is the highest frequency still returned by the ionosphere for a specific path and time. Above the MUF, signals penetrate the ionosphere instead of refracting back.

Question 44Radio Wave Propagation

Which propagation mode allows VHF and UHF signals to travel well beyond the radio horizon by bending around the curvature of the Earth?

  1. Tropospheric ducting Correct answer.
  2. Meteor scatter
  3. Ground wave
  4. Sporadic-E skip

Explanation

Tropospheric ducting occurs when temperature inversions trap VHF and UHF signals in a duct, letting them follow the Earth's curvature for long distances. It is a lower-atmosphere effect distinct from ionospheric modes.

Question 45Radio Wave Propagation

What is the typical effect of increased sunspot activity on HF propagation?

  1. A shift of all HF propagation to ground wave
  2. Complete loss of all HF propagation
  3. Higher MUFs and generally better long-distance HF conditions Correct answer.
  4. Lower MUFs and reduced long-distance HF paths

Explanation

Higher sunspot numbers raise ionospheric ionization, which increases the MUF and supports more long-distance HF paths. Conditions on higher bands improve during solar maxima.

Question 46Radio Wave Propagation

Which of these best describes the ionospheric region known as sporadic-E?

  1. Small, dense patches of ionization in the E layer that can reflect VHF signals Correct answer.
  2. A zone in the F layer that only forms during solar eclipses
  3. A permanent nighttime layer that absorbs HF signals
  4. A region of the troposphere that traps UHF signals

Explanation

Sporadic-E consists of localized, dense patches of ionization in the E region that can reflect signals at VHF and sometimes higher. These patches are irregular in time and location.

Question 47Radio Wave Propagation

A signal at 14 MHz is refracted by the ionosphere over a given path where the MUF is 12 MHz. What most likely happens to the signal?

  1. It returns to Earth at a much shorter distance
  2. It is refracted back exactly as at 12 MHz
  3. It penetrates the ionosphere rather than returning to Earth Correct answer.
  4. It is absorbed completely in the D layer

Explanation

When the operating frequency exceeds the MUF for a path, the ionosphere can no longer refract the signal back to Earth, so it passes through. The MUF marks the upper limit for a given path and time.

Question 48Radio Wave Propagation

Why is the lowest usable frequency (LUF) often higher during the day than at night on an HF path?

  1. Ionization decreases when the Sun is up
  2. The F layer disappears during daylight hours
  3. Solar flares only occur at night
  4. Daytime D-layer absorption increases, raising the frequency needed to get through Correct answer.

Explanation

Strong daytime D-layer ionization absorbs low-frequency signals heavily, so a higher frequency is needed to penetrate with acceptable loss, raising the LUF. At night the D layer weakens, allowing lower frequencies to be usable.

Question 49Radio Wave Propagation

An operator notices strong HF signals arriving from a distant continent along a great-circle path that passes near the auroral zone during a geomagnetic storm. What is the most likely effect on that path?

  1. A permanent shift to ground-wave propagation
  2. Improved signal strength and clarity
  3. Increased signal degradation and fading along the disturbed path Correct answer.
  4. Complete reflection of all signals by the aurora

Explanation

Geomagnetic storms disturb the ionosphere near auroral regions, causing absorption and irregular refraction that degrade signals crossing those areas. Paths avoiding the auroral zone are usually less affected.

Question 50Radio Wave Propagation

What propagation mechanism is responsible for occasional long-distance contacts on 6 meters during the summer?

  1. D-layer reflection
  2. Ground-wave propagation
  3. Tropospheric refraction over mountains
  4. Sporadic-E propagation Correct answer.

Explanation

Sporadic-E patches can reflect 6-meter signals over long distances, especially in summer. These openings are intermittent and tied to dense E-layer ionization.