Every transmission should be ended with the word to indicate you are awaiting a reply.

• A. OUT
• B. OVER
• C. END
• D. FINISH

Answer: (B)

The main thing this tests is proper radiotelephone communication etiquette, specifically how to signal you’re finished speaking and want a reply. In radio talk, you end your transmission with the word over to indicate you’ve said what you need and you’re waiting for the other station to respond. This keeps conversations orderly on a shared, sometimes noisy channel and makes it clear when to listen for a reply.

Using over invites a response, so the other party knows it’s their turn to speak. The other options don’t fit this purpose: out is a signal that you’re finished and do not expect a reply, which would close the channel; end and finish aren’t standard radio prowords, so they wouldn’t reliably indicate awaiting a reply.