Ham Radio Technician Test Amateur 4 — Questions and Answers
Question 1: What is the significance of the Q-code 'QRZ'?
- Who is calling me? (Correct answer)
- Please stand by
- Signal is fading
- Interference is present
Correct answer: Who is calling me?
QRZ means 'Who is calling me?' and is commonly used after a CQ call or to ask who just transmitted.
Question 2: Under what condition may an amateur radio operator use obscene language on the air?
- Only during late-night hours
- Only on licensed club repeaters
- Never — obscene language is prohibited at all times (Correct answer)
- Only if both stations agree
Correct answer: Never — obscene language is prohibited at all times
FCC rules explicitly prohibit the transmission of obscene, indecent, or profane language on amateur frequencies at any time.
Question 3: What does 'SWR' stand for and what does a reading of 1:1 indicate?
- Signal Wave Ratio; the antenna is broken
- Standing Wave Ratio; a perfect impedance match with no reflected power (Correct answer)
- Sideband Wave Ratio; the signal is single sideband
- Spread Wave Ratio; the antenna is broadband
Correct answer: Standing Wave Ratio; a perfect impedance match with no reflected power
SWR (Standing Wave Ratio) of 1:1 means the antenna system is perfectly matched to the transmitter with no reflected power.
Question 4: What is meant by an amateur radio 'net'?
- An internet gateway linking repeaters worldwide
- A group of stations that meet on a set frequency at a scheduled time (Correct answer)
- A mesh of linked amateur satellites
- A digital packet radio network
Correct answer: A group of stations that meet on a set frequency at a scheduled time
An amateur net is an organized group of stations that convene on a specific frequency at a scheduled time, often led by a net control station.
Question 5: Which of the following is a valid reason for an amateur operator to use a 'tactical call sign' during emergency operations?
- To avoid FCC identification requirements entirely
- To identify a station's function or location clearly during a rapidly changing situation (Correct answer)
- To operate anonymously for security purposes
- To use a shorter call sign than the FCC assigned
Correct answer: To identify a station's function or location clearly during a rapidly changing situation
Tactical call signs (e.g., 'Command Post' or 'Red Cross Shelter') identify a station's role during emergencies but do not replace FCC ID requirements.
Question 6: What is 'propagation' in the context of amateur radio?
- The process of amplifying a radio signal
- The way radio waves travel from a transmitter to a receiver (Correct answer)
- The method of encoding voice into digital data
- The procedure for registering a repeater frequency
Correct answer: The way radio waves travel from a transmitter to a receiver
Propagation describes how radio waves travel through the environment from transmitter to receiver, influenced by the ionosphere, terrain, and frequency.
Question 7: What is the correct way to indicate you are listening on a repeater and willing to talk?
- Transmit your call sign followed by 'monitoring' or 'listening' (Correct answer)
- Key up the repeater three times
- Transmit 'CQ CQ CQ' on the input frequency
- Send a DTMF code to unlock the repeater
Correct answer: Transmit your call sign followed by 'monitoring' or 'listening'
Saying your call sign followed by 'monitoring' or 'listening' is the standard way to announce your presence on a repeater.
Ham Radio Technician Test Amateur 4
What is the significance of the Q-code 'QRZ'?