Basic Qualification · B-002 Operating and procedures · B-002-004-011
Before transmitting, the first thing you should do is:
- A ask if the frequency is occupied
- B make an announcement on the frequency indicating that you intend to make a call
- C decrease your receiver's volume
- D listen carefully so as not to interrupt communications already in progress
Correct answer: D — listen carefully so as not to interrupt communications already in progress. From the official ISED question bank, verified word for word.
Why
Listening carefully ensures you do not jump on a frequency that others are already using, which is the most basic rule of good radio etiquette. 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.