Avielevate / DGCA CPL papers / Air Navigation / Sample Paper 1
Sample Paper 1 — DGCA CPL Air Navigation
Chapter SP01 of the Air Navigation paper. 100 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 Sample Paper 1 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 | 100 questions |
Sample Sample Paper 1 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.
0242101 · Sample Paper 1
Which combination makes gyroscopic rigidity stronger?
- AHigher RPM with the mass concentrated near the center
- BHigher RPM with the mass concentrated toward the outer rim
- CLower RPM with a smaller radius
Why that is the answer
A spinning wheel (a **gyroscope**, or gyro) likes to keep its spin axis pointing the same way in space. This is called **rigidity** (also gyroscopic inertia). A bicycle wheel spinning fast is hard to tilt, while a still wheel tilts easily.
Rigidity comes from the rotor's **angular momentum**, the 'amount of spin' it carries. Angular momentum grows in two ways:
- **Spin faster**: more RPM means more angular momentum.
- **Put the mass far from the centre**: mass at the rim counts for much more than mass near the hub, because it moves faster and further from the axis (a higher moment of inertia).
That is why gyro rotors are made heavy at the outer edge and spun at very high speed.
So rigidity is strongest with **higher RPM and the mass concentrated towards the outer rim**.
**Tip:** think of a figure skater: arms out (mass outward) makes the spin much harder to change.
0242102 · Sample Paper 1
Around which date is the Earth at perihelion (its closest point to the Sun)?
- A21 March
- B21 September
- CEarly January
Why that is the answer
The Earth goes round the Sun on a path that is not a perfect circle but a very slightly stretched one, called an **ellipse**. So the distance to the Sun changes a little during the year.
- **Perihelion** is the point of the orbit closest to the Sun.
- **Aphelion** is the point furthest from the Sun.
The Earth reaches perihelion in **early January** (around 3 January) and aphelion in early July. The difference is only about 3%.
This may feel strange, because January is winter in the northern hemisphere. The seasons are caused by the **tilt of the Earth's axis** (about 23.5°), which changes how high the Sun climbs in the sky, not by the small change in distance.
So the Earth is at perihelion in **early January**.
**Tip:** a side effect is that the Earth moves slightly faster in its orbit near perihelion, one reason the length of the solar day varies a little through the year.
0242103 · Sample Paper 1
Convergence is:
- AThe angle of inclination of meridians toward each other
- BThe angle at which a meridian cuts the equator
- CThe angle of inclination of one parallel of latitude with another
Why that is the answer
**Meridians** are the lines of longitude running from the North Pole to the South Pole. At the equator they are all parallel to each other, pointing straight north-south. But they all meet at the poles, so as you move away from the equator they lean towards each other.
**Convergence** (also called convergency) is the **angle between two meridians**, in other words how much they are inclined towards each other at a given latitude.
It depends on how far apart the meridians are and on the latitude:
Convergence = change of longitude × sin latitude
At the equator sin 0° = 0, so convergence is zero. At the poles sin 90° = 1, so convergence equals the full change of longitude.
Convergence matters because a straight line on the globe (a great circle) cuts each meridian at a different angle, so its true track changes as you fly along it.
So convergence is **the angle of inclination of meridians towards each other**.
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Frequently asked
How many Sample Paper 1 questions are there for the DGCA CPL Air Navigation paper?
Avielevate's bank carries 100 published Sample Paper 1 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 Sample Paper 1?
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 Sample Paper 1?
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