Avielevate / DGCA CPL papers / Air Regulations / Separation Methods and Minima
Separation Methods and Minima — DGCA CPL Air Regulations
Chapter 05 of the Air Regulations paper. 32 practice questions in the Avielevate bank, every one with its answer key, filterable into a timed set on this chapter alone.
What this chapter covers
The learning objectives we file Separation Methods and Minima 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 objective | In the bank |
|---|
| __GEN__ General | 32 questions |
Sample Separation Methods and Minima 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.
0106015 · Separation Methods and Minima
What separation applies to aircraft on converging tracks at the same level?
- A15 min
- B10 min
- C45 min
Why that is the answer
When two aircraft are on converging tracks at the same flight level and radar or a suitable distance-measuring method is not being used to apply an angular or distance-based minimum, ATC falls back on a time-based longitudinal separation standard to ensure the aircraft do not close to an unsafe distance as their tracks come together. For this converging-track, same-level situation, the applicable minimum is 15 minutes of longitudinal separation, matching the same 15-minute standard used elsewhere in procedural, non-radar separation for situations where geometry brings two aircraft's paths into proximity. This larger time value, compared to the shorter minima used for same-track cruising traffic, reflects the added uncertainty of converging geometry, where the point and moment of closest approach is harder to predict precisely without radar or continuous distance data. Where radar coverage or an accurate distance-measuring method is available, ATC would normally apply an angle or distance-based separation standard instead, which can be less restrictive than the flat 15-minute procedural minimum.
- Identify the geometry: two aircraft on converging tracks, at the same flight level, without radar or distance-based separation being applied.
- Recognise that converging tracks bring the aircraft closer together over time, so a safety buffer is required.
- Apply the standard procedural time-based minimum for this situation: 15 minutes of longitudinal separation.
- Note this is a larger buffer than same-track cruising minima, reflecting the extra uncertainty of converging-track geometry without radar.
- Select 15 minutes as the correct minimum for converging tracks at the same level.
- Mnemonic — Converging paths, bigger buffer: procedural converging-track separation uses the larger 15-minute standard.
0106022 · Separation Methods and Minima
ADS-B is being used for separation in a non-radar environment. What is the minimum safe distance, in NMs, between these aircraft?
- A10
- B5
- C3
Why that is the answer
ADS-B (Automatic Dependent Surveillance – Broadcast) lets an aircraft continuously transmit its own GPS-derived position, and where ATC has ADS-B ground receiving stations but no radar coverage, that position data can still be used to apply separation more precisely than purely procedural, time- or distance-report methods, even though it falls short of full radar surveillance. In such an ADS-B-based, non-radar procedural environment, the minimum safe separation distance ATC applies between two ADS-B-equipped aircraft is 10 NM — larger than the classic radar separation minima, typically 5 NM en route and 3 NM in terminal areas, because ADS-B relies on the aircraft's own broadcast position and a ground receiving network rather than the independent, continuously-updated picture a controller has with true radar surveillance. The 10 NM figure represents a conservative, approved compromise: tighter than the much larger purely procedural longitudinal minima used where no ADS-B or radar data exists at all, but still wider than radar separation because ADS-B, while continuous and accurate, remains a broadcast-and-receive method rather than an independently-verified radar return. This value is applied, for example, in oceanic and remote-area airspace that has installed ADS-B ground stations to improve on pure procedural separation without yet qualifying for full radar-equivalent minima.
- Recognise the scenario: ADS-B surveillance is available, but conventional radar coverage is not — a non-radar, ADS-B environment.
- Recall that ADS-B still allows tighter separation than purely procedural, no-surveillance methods, because it delivers continuous, aircraft-broadcast position data.
- Recall that ADS-B-based separation in this non-radar context is nonetheless wider than true radar separation, since it lacks independent radar verification.
- Recall the applicable ADS-B non-radar minimum distance: 10 NM.
- Rule out 3 NM and 5 NM, which are radar terminal and en-route figures, tighter than what non-radar ADS-B alone supports.
- Mnemonic — No radar, but ADS-B's in play — ten miles keeps you safely away.
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Frequently asked
How many Separation Methods and Minima questions are there for the DGCA CPL Air Regulations paper?
Avielevate's bank carries 32 published Separation Methods and Minima questions for Air Regulations, mapped across 1 learning objective. Every one has its answer key, and explanations are being written across the whole bank.
How much of the Air Regulations paper is Separation Methods and Minima?
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 Separation Methods and Minima?
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 Air Regulations paper
One account covers every chapter of every paper.
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