Basic Qualification · B-002 Operating and procedures · B-002-003-003
What is simplex operation?
- A Transmitting and receiving on the same frequency
- B Transmitting and receiving over a wide area
- C Transmitting on one frequency and receiving on another
- D Transmitting one-way communications
Correct answer: A — Transmitting and receiving on the same frequency. From the official ISED question bank, verified word for word.
Why
Simplex operation means you talk and listen on the exact same radio frequency, much like a walkie-talkie where you press a button to speak and release it to hear. The full explanation — and one for every question — is in Pro.
Practise this section
How to operate: calling, phonetics, Q-signals, repeaters, nets, emergency traffic, and the courtesies that keep a band usable.