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Gyroscope & Gyroscopic Instruments — DGCA CPL Air Navigation
Chapter GN20 of the Air Navigation paper. 80 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 Gyroscope & Gyroscopic Instruments 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 | 80 questions |
Sample Gyroscope & Gyroscopic Instruments 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.
0228100 · Gyroscope & Gyroscopic Instruments
During an acceleration at constant attitude, the erection system of the artificial horizon makes the horizon bar show:
- Anose-down followed by nose-up
- Ba constant attitude
- Ca nose-up attitude
Why that is the answer
A classic artificial horizon keeps its gyro upright with an **erection system** controlled by small hanging flaps called **pendulous vanes**. They hang 'down' like a plumb line, and the air jets they control push the gyro back towards that direction.
When the aircraft accelerates, the vanes swing backwards, just as you are pressed back into your seat when a car speeds up. They now treat a direction tilted towards the rear as 'down', a **false vertical**.
The erection system slowly precesses the top of the gyro towards the front to line up with this false vertical. On the instrument the horizon bar moves down relative to the aircraft symbol, which looks exactly like the nose rising.
So during acceleration at constant attitude the horizon bar shows **a nose-up attitude** (a false climb).
**Tip:** accelerate = false climb, decelerate = false descent.
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Frequently asked
How many Gyroscope & Gyroscopic Instruments questions are there for the DGCA CPL Air Navigation paper?
Avielevate's bank carries 80 published Gyroscope & Gyroscopic Instruments 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 Gyroscope & Gyroscopic Instruments?
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 Gyroscope & Gyroscopic Instruments?
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