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Air Speed Indicator — DGCA CPL Air Navigation
Chapter GN18 of the Air Navigation paper. 96 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 Air Speed Indicator 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 | 96 questions |
Sample Air Speed Indicator 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.
0226143 · Air Speed Indicator
During the climb after take-off from a contaminated runway, the pitot (total pressure) probe becomes blocked. The pilot will see the indicated airspeed:
- Afall suddenly towards zero
- Bincrease steadily
- Crise suddenly towards VNE (Never-Exceed Speed)
Why that is the answer
The airspeed indicator (ASI) shows the difference between **pitot pressure** (from the pitot probe) and **static pressure** (from the static port).
On a contaminated runway, slush or water can be thrown up into the pitot probe and freeze or block it. Once the pitot probe is blocked, the pressure inside the pitot line is **trapped** at the value it had at that moment.
During the climb, the static pressure outside keeps **falling** as the aircraft gets higher. The trapped pitot pressure stays the same. So the difference between them, which the ASI shows as speed, keeps getting **bigger**.
This is a gradual change, following the height gained, not a sudden jump. The ASI shows the speed **increasing steadily**, even if the real airspeed does not change. Look at the top-left box of the diagram.
A pilot who believes it might pitch up or reduce power to 'slow down', which could lead to a stall.
So the pilot will see the indicated airspeed **increase steadily**.
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Frequently asked
How many Air Speed Indicator questions are there for the DGCA CPL Air Navigation paper?
Avielevate's bank carries 96 published Air Speed Indicator questions for Air Navigation, 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 Navigation paper is Air Speed Indicator?
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 Air Speed Indicator?
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 Navigation paper
One account covers every chapter of every paper.
← All Air Navigation chapters · All six DGCA CPL papers