Amateur Radio Practices

5 free sample questions of the 23 in this topic. The full set is in the app.

1. Question 1

   Which of the following is an appropriate power supply rating for a typical 50-watt output mobile FM transceiver?

   • A.24.0 volts at 4 amperes
   • B.13.8 volts at 4 amperes
   • C.24.0 volts at 12 amperes
   • D.13.8 volts at 12 amperes
   Show answer & explanation

   Answer: D. 13.8 volts at 12 amperes

   13.8 volts at 12 amperes. (NCVEC T4A)

   Source: 2026-2030 Technician Class FCC Element 2 Question Pool and Syllabus — Subelement T4, Group T4A, Question T4A01

2. Question 2

   Which of the following should be considered when selecting an accessory SWR meter?

   • A.The frequency and power level at which the measurements will be made
   • B.The distance that the meter will be located from the antenna
   • C.The maximum SWR anticipated on the transmission line
   • D.The ability of the meter to compensate for a poor transmission line match to the antenna
   Show answer & explanation

   Answer: A. The frequency and power level at which the measurements will be made

   The frequency and power level at which the measurements will be made. (NCVEC T4A)

   Source: 2026-2030 Technician Class FCC Element 2 Question Pool and Syllabus — Subelement T4, Group T4A, Question T4A02

3. Question 3

   Why are short, heavy-gauge wires used for a transceiver's DC power connection?

   • A.To minimize voltage drop when transmitting
   • B.To provide a close match to the power supply output impedance
   • C.To avoid RF interference
   • D.To minimize radiative losses in the power cable
   Show answer & explanation

   Answer: A. To minimize voltage drop when transmitting

   To minimize voltage drop when transmitting. (NCVEC T4A)

   Source: 2026-2030 Technician Class FCC Element 2 Question Pool and Syllabus — Subelement T4, Group T4A, Question T4A03

4. Question 4

   How are the audio input and output of a transceiver connected in a station configured to operate using FT8?

   • A.To a computer running a terminal program and connected to a terminal node controller unit
   • B.To the audio output and input of a computer running FT8 software
   • C.To an FT8 conversion unit, a keyboard, and a computer monitor
   • D.To a computer connected to the FT8converter.com website
   Show answer & explanation

   Answer: B. To the audio output and input of a computer running FT8 software

   To the audio output and input of a computer running FT8 software. (NCVEC T4A)

   Source: 2026-2030 Technician Class FCC Element 2 Question Pool and Syllabus — Subelement T4, Group T4A, Question T4A04

5. Question 5

   Where should an RF power meter be installed?

   • A.In the feed line, between the transmitter and antenna
   • B.At the power supply output
   • C.In parallel with the push-to-talk line and the antenna
   • D.In the power supply cable, as close as possible to the radio
   Show answer & explanation

   Answer: A. In the feed line, between the transmitter and antenna

   In the feed line, between the transmitter and antenna. (NCVEC T4A)

   Source: 2026-2030 Technician Class FCC Element 2 Question Pool and Syllabus — Subelement T4, Group T4A, Question T4A05

18 more Amateur Radio Practices questions are in the app, along with explanations and flashcards for every one.

OnAir is an independent study aid based on the NCVEC 2026-2030 Technician Class question pool and 47 CFR Part 97. It is not affiliated with, endorsed by, or sponsored by the FCC, NCVEC, ARRL, or any government agency.