Extra exam question E3C07
Subelement E3, RADIO WAVE PROPAGATION· Group E3C
E3C07
Which of the following indicates the greatest solar flare intensity?
- A.Class A
- B.Class Z
- C.Class M
- D.Class X (correct answer)
WhyClass X flares indicate the greatest solar flare intensity. Solar flares are classified by X-ray output into letter classes of increasing intensity, and Class X flares are the most intense category, representing the strongest and potentially most disruptive solar flares, answer D. Class A is the weakest end of the scale, Class M sits well below X in intensity, and there is no "Class Z" in the standard flare classification.
Published 2026-08-28 · Last updated 2026-08-28 · Question text is verbatim from the 2024-2028 NCVEC Element 4 pool (public domain); the explanation above is original writing, see our methodology.
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