Avielevate / DGCA CPL papers / Aviation Meteorology / Clouds and Precipitation
Clouds and Precipitation — DGCA CPL Aviation Meteorology
Chapter 05 of the Aviation Meteorology paper. 73 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 Clouds and Precipitation 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 |
|---|
| 0312 Clouds | 51 questions |
| 0313 Precipitation | 22 questions |
Sample Clouds and Precipitation 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.
030089 · Clouds and Precipitation
Which of the following returns a radar echo?
- AFog
- BHail
- CCloud
- DMist
Why that is the answer
Weather radar (and ATC surveillance radar 'weather clutter') detects precipitation primarily by backscatter from relatively large water/ice particles — the radar reflectivity of a target scales strongly with the sixth power of particle diameter (per the Rayleigh scattering approximation), so large particles like hailstones return a very strong radar echo. Hail, being composed of large, dense ice particles, is one of the strongest radar reflectors found in the atmosphere, which is precisely why weather radar is used operationally to detect and avoid severe convective cells containing hail. Fog (a) and mist (d) consist of very small water droplets whose diameters are far too small to reflect appreciable radar energy at typical weather-radar wavelengths, making them essentially radar-transparent. Plain cloud (c) without precipitation-sized droplets similarly returns little to no significant echo, since cloud droplets are also very small compared to raindrops or hailstones. Hail's large particle size therefore gives by far the strongest reflected radar return among the options, making b correct.
- Radar reflectivity depends strongly on particle size (~diameter^6, Rayleigh scattering)
- Hailstones are large, dense ice particles producing very strong echoes
- Fog and mist consist of tiny droplets that barely reflect radar energy
- Plain (non-precipitating) cloud also gives negligible radar return
- Correct answer: b (Hail)
031329 · Clouds and Precipitation
Clouds are divided into four families according to their
- Aoutward shape.
- Bheight range.
- Ccomposition.
- Drate of formation.
Why that is the answer
The World Meteorological Organization's four cloud families are defined by the altitude (height) range at which the cloud bases occur.
- The international cloud classification groups clouds into four families - high, middle, low, and clouds with vertical extent - based on the altitude range (height) at which their bases typically occur.
- Within each height-based family, clouds are further divided into genera by their outward shape (e.g., cirrus, stratus, cumulus), but that finer classification sits on top of the primary height-based grouping the question is asking about.
- Eliminate Option A: outward shape (cumuliform vs stratiform) is the basis for cloud GENERA, not the four families themselves.
- Eliminate Option C: composition (ice crystal vs water droplet) affects appearance but is not the criterion used to define the four families.
- Since the four families are defined by altitude/height range, Option B is correct.
032020 · Clouds and Precipitation
The presence of ice pellets at the surface is evidence that there
- Aare thunderstorms in the area.
- Bhas been cold frontal passage.
- Cis a temperature inversion with freezing rain at a higher altitude.
- Dis unstable air producing showery precipitation.
Why that is the answer
Ice pellets at the surface prove that snow melted in a warm layer aloft and refroze while falling, meaning there is a temperature inversion with freezing rain aloft.
- Ice pellets (sleet) form when snowflakes falling from a cold cloud layer melt as they pass through a warm layer aloft, then refreeze into ice pellets as they fall through a colder layer near the surface.
- This melt-then-refreeze sequence is only possible if a temperature inversion exists - a warm layer sitting above a colder surface layer - through which the precipitation falls.
- If that warm layer is not cold or thick enough to fully refreeze the drops before they reach the ground, the same setup instead produces freezing rain, so ice pellets at the surface are direct evidence that freezing rain (supercooled liquid) exists in the warmer layer aloft, above a low-level inversion.
- Eliminate Option A: thunderstorm activity is a convective process not specifically indicated by ice pellets.
- Eliminate Option B: a cold frontal passage alone does not require the specific melt-and-refreeze temperature structure that ice pellets demand.
- Option C correctly identifies the inversion-with-freezing-rain-aloft structure.
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Frequently asked
How many Clouds and Precipitation questions are there for the DGCA CPL Aviation Meteorology paper?
Avielevate's bank carries 73 published Clouds and Precipitation questions for Aviation Meteorology, mapped across 2 learning objectives. Every one has its answer key, and explanations are being written across the whole bank.
How much of the Aviation Meteorology paper is Clouds and Precipitation?
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 Clouds and Precipitation?
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 Aviation Meteorology paper
One account covers every chapter of every paper.
← All Aviation Meteorology chapters · All six DGCA CPL papers