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Radio Theory and Propagation — DGCA CPL Radio Telephony

Chapter 05 of the Radio Telephony paper. 67 practice questions in the Avielevate bank, every one with its answer key, filterable into a timed set on this chapter alone.

67
Questions
1
Learning objectives
06.05
Syllabus code

What this chapter covers

The learning objectives we file Radio Theory and Propagation questions under, and how many sit behind each. These come straight out of the bank and are regenerated whenever it changes — they are what is there today, not a claim.

Learning objectiveIn the bank
__GEN__   General67 questions

Sample Radio Theory and Propagation questions, answered and explained

Real questions from this chapter, with the answer marked and the reasoning written out — the same explanations you get inside the app.

0605001 · Radio Theory and Propagation
RCAG (Remote Center Air/Ground) sites are linked to the ACCs by:
  1. AHF sky wave
  2. BLandlines/microwave
  3. CSatellites only

Why that is the answer

RCAG sites are linked to the Area Control Centres by **landlines or microwave links**. The RCAG site has the radio transmitters and receivers; the controller sits in the ACC far away and talks to aircraft through it.

0605021 · Radio Theory and Propagation
At night, HF communication frequencies are usually:
  1. AReduced, to prevent dead space
  2. BIncreased, to get more range
  3. CKept the same over the ocean

Why that is the answer

At night, **lower HF frequencies** are used. The ionosphere weakens after sunset, so higher frequencies pass straight through it into space. Remember: "sun up, frequency up; sun down, frequency down".

0605052 · Radio Theory and Propagation
Radio waves bend towards the normal when they move from:
  1. AA less dense to a more dense medium
  2. BA more dense to a less dense medium
  3. CParallel to the boundary

Why that is the answer

Waves bend **towards the normal** when they pass from a **less dense into a more dense medium**, because they slow down. This bending is called **refraction**.

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Frequently asked

How many Radio Theory and Propagation questions are there for the DGCA CPL Radio Telephony paper?

Avielevate's bank carries 67 published Radio Theory and Propagation questions for Radio Telephony, mapped across 1 learning objective. Every one has its answer key, and explanations are being written across the whole bank.

How much of the Radio Telephony paper is Radio Theory and Propagation?

The DGCA does not publish a per-chapter breakdown of its papers, so nobody can honestly tell you — and we will not guess. What we can tell you is what students who have just sat a paper reported meeting, which is measured rather than rumoured: that is the exam recall report inside the app.

What is the best way to revise Radio Theory and Propagation?

Sit a short timed set on this chapter alone, tag how sure you were of each answer, then drill the two that actually leak marks: the ones you got right while guessing, and the ones you got wrong while confident. Avielevate does that tagging for you and puts anything you got wrong back in front of you on a spaced schedule.

The rest of the Radio Telephony paper

One account covers every chapter of every paper.

← All Radio Telephony chapters  ·  All six DGCA CPL papers