Morse Code Quiz

Introduction

Morse code turns written characters into short and long signal marks. A dot, often called a dit, is the short mark. A dash, often called a dah, is the long mark. The pattern is the character, so changing one mark changes the answer completely.

Visual Morse practice helps when the alphabet still feels crowded. Letters such as S and H differ by only one dot, while B and 6 share a similar longer shape. Seeing the marks clearly lets a learner slow down, compare near misses, and build a reliable memory before adding sound, speed, and sending rhythm.

International Morse code also has timing rules, even when a practice session only shows dots and dashes. A dash lasts three dot units, marks inside a character are separated by one dot unit, letters are separated by three dot units, and words are separated by seven dot units. Those timing rules explain why visual recognition is only one part of the skill. A learner still has to turn the pattern into a rhythm when listening or sending.

Multiple-choice drills are useful because they expose specific confusions. A missed answer is not just a wrong total. It tells you which displayed pattern was mistaken for which character. Repeating the same run can show whether a weak pair has improved, while a fresh shuffled run checks whether recognition holds up when the order changes.

A strong visual score should be read narrowly. It means the displayed dot-dash patterns were matched well under the quiz conditions. It does not prove copy speed, clean keying, punctuation knowledge, or the ability to receive full words from audio.

Technical Details:

International Morse code assigns a unique sequence of dots and dashes to letters, figures, punctuation marks, and operating signs. This quiz focuses on the most common beginner subset: the 26 Latin letters and the ten digits. It does not include accented letters, punctuation, procedural signs, or word-spacing exercises.

The letters are not organized by alphabetical order inside the code itself. Short one-mark characters sit near the top of the learning tree, and longer characters grow by adding dots or dashes. That is why beginners often learn character sound and shape together instead of memorizing a plain alphabetical table.

The core mapping used for recognition is exact and case-insensitive for the built-in symbols. Letter answers are shown as uppercase A through Z, and number answers are shown as 0 through 9. The displayed prompt is generated from the stored dot-dash pattern for the correct character.

Scoring is a count of correct matches. Each question contributes one point when the selected option equals the correct character and zero points otherwise. The percentage is rounded to the nearest whole number, so a score of 8 out of 15 reports 53 percent rather than a long decimal.

A seeded run is deterministic. The seed text is converted into a repeatable pseudo-random stream, the selected character pool is shuffled, the requested number of prompts is taken from that shuffled pool, and each prompt receives three wrong options from the same pool. The answer options are shuffled too, so the seed controls both the prompt order and the correct button position.

International timing rules still matter when interpreting what the quiz does not measure. A visual prompt such as ... can be recognized as S without hearing three short marks separated by the correct pauses. Audio receiving adds speed, spacing, tone, noise, and word grouping. Sending adds keying rhythm and spacing accuracy.

Everyday Use & Decision Guide:

For first practice, choose Letters and a 10-question run. That gives enough variety to reveal common mix-ups without making the session drag. Move to 20 or 26 questions when you want fuller alphabet coverage, or switch to Numbers when digit patterns are the weak area.

The mixed Letters + Numbers set is better for review than for first learning. It draws from all 36 built-in characters and supports 10, 15, 20, 30, or 36 questions. A lower score in the mixed set is expected when numbers are newly added, so compare it with other mixed runs rather than with an easier letters-only drill.

• Letters: A to Z, with 5, 10, 15, 20, or 26 questions.
• Numbers: 0 to 9, with 5 or 10 questions.
• Letters + Numbers: A to Z plus 0 to 9, with 10, 15, 20, 30, or 36 questions.

Use the random seed when repeatability matters. The same set, question count, and seed rebuild the same prompts and answer ordering. That helps a class take the same quiz, lets a learner repeat a missed run after review, and keeps comparisons fair when the goal is improvement rather than a lucky shuffle.

Leave the seed blank when you want a fresh drill. The quiz creates a new seed at the start, writes the state into the page address, and shows the seed with the finished score. If you copy a result link, remember that the address can carry quiz state, including the seed and answer progress.

For quick daily practice, keep one familiar seed for a baseline run and use unseeded runs for variety. The baseline shows whether yesterday's weak characters are improving, while new shuffles reduce the chance that you are only remembering one question order.

After finishing, read the score together with the selected set and question count. The Attempt Ledger is the best place to find repeated mistakes, while the Accuracy Split Chart gives only the correct-versus-wrong balance. Save or copy the result only after checking the rows that actually caused the score.

Step-by-Step Guide:

Use the setup controls to make the run match the practice goal before starting.

1. Choose Quiz set. Watch the Pool size value so you know how many unique characters are available.
2. Choose Number of questions. If a pasted or shared value is not allowed for the selected pool, the count is moved to an allowed value for that pool.
3. Open Advanced and enter Random seed only when you want a repeatable quiz. Seed text is trimmed and limited to 64 characters.
4. Select Start Quiz. The progress bar and answered count show how far through the run you are.
5. For each dot-dash image, choose one of the four answer buttons. After answering, the correct option is marked and a wrong selection is shown separately.
6. Use Next until the last question finishes. The score summary, overview cards, and result tabs appear automatically.
7. Open Attempt Ledger to compare Your answer with Correct answer. Use Accuracy Split Chart for the percentage split and JSON when you need structured run data.
8. Choose Retake (same seed) for exact replay or Retake (new seed) for another shuffled run.

Interpreting Results:

The raw score is the main result. Primary score tells you how many answers were correct out of the total, and Correct % turns that into a rounded percentage. A perfect score on five letters is useful, but it is not the same evidence as a perfect score on 36 mixed characters.

The row detail matters more than the chart when you are deciding what to study next. If .... was answered as S, the issue is probably counting short marks. If -.... was answered as B, the issue may be mixing a digit with a similar letter pattern. Those mistakes are visible in the Attempt Ledger, not in the percentage alone.

• Trust the run most when set, count, and seed are known and the Attempt Ledger rows match the skill you meant to practice.
• Slow down when the same wrong answer appears more than once, because one memorized confusion can hide behind a fair overall percentage.
• Do not overread a high score as audio receiving skill. Use audio practice separately before judging listening speed or sending rhythm.

Worked Examples:

Short alphabet check

A learner chooses Letters, sets Number of questions to 10, and leaves Random seed blank. The finished summary shows Primary score as 8/10 and Correct % as 80%. In the Attempt Ledger, both missed rows involve four-mark letters, so the next practice run should stay with letters rather than switching to numbers.

Repeatable classroom run

An instructor gives the class Numbers, 10 questions, and the seed figures-week-1. Every student receives the same number prompts and the same answer ordering. Comparing Primary score and the Attempt Ledger rows is fair because the questions are not changing from student to student.

Mixed review before adding audio

A student chooses Letters + Numbers, selects 30 questions, and reuses a seed from yesterday. The score improves from 20/30 to 25/30, but the remaining missed rows are all digits. The result supports more figure practice, not a conclusion that full audio copy is ready.

Shared link opens at setup

A copied link may return to setup if its saved quiz state no longer matches the selected count or seed. Re-enter the intended Quiz set, Number of questions, and Random seed, then start the run again. If exact replay matters, copy the seed from the score summary before leaving the result screen.

FAQ:

Glossary:

Dit

The short Morse mark, written as a dot in the quiz.

Dah

The long Morse mark, written as a dash and equal to three dot units in standard timing.

Seed

Text used to recreate the same shuffled run when the set and question count stay the same.

Distractor

A wrong multiple-choice option shown beside the correct character.

Attempt Ledger

The result table that lists each prompt, your answer, the correct answer, and whether it was correct.

Pattern map

The structured result data that pairs each correct answer with its Morse dot-dash pattern.

References:

• Recommendation ITU-R M.1677-1: International Morse code, International Telecommunication Union, October 2009.
• Learning Morse Code, ARRL.
• Morse Code Timing, MorseCode.World.