Morse Code Quiz

Match each dot-dash pattern to its {{ promptNoun }}. Choose how many questions you want and optionally set a seed to make a shareable quiz.

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#	Pattern	Your answer	Correct answer	Copy
{{ i + 1 }}		{{ row.yourAnswer }}	{{ row.correctAnswer }}

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A Morse pattern is a small timing shape, not just a string of punctuation marks. Each character is built from short marks and long marks, and the order of those marks identifies the letter or digit. The same idea works visually on paper and by ear over radio, but the skills develop differently: visual recognition helps with memory, while real copying and sending depend on rhythm.

International Morse code is the modern reference most learners meet first. It covers the Latin alphabet, digits, punctuation, and procedural signs, although beginner drills usually focus on letters and numbers before adding the rest. A dot, often called a dit in sending practice, is the base unit. A dash, often called a dah, lasts three dot units. The spaces are part of the code too, because a run of marks only becomes readable when the receiver can tell where one character and one word end.

Morse timing diagram showing dot length, dash length, letter and word gaps, and similar patterns such as S, H, B, and 6.

The shortest patterns are easy to learn because they sit near the top of the code tree: E is a dot and T is a dash. Longer patterns branch from those first choices. That structure is helpful for beginners, but it also creates traps. S and H differ by one dot, and B and 6 share a dash followed by several dots. A learner who recognizes the general shape can still miss the count.

Morse code is not encryption. Anyone who knows the code can read the message, and the meaning still depends on normal language, callsigns, abbreviations, and operating practice. The code's value is that it carries text with simple on-off signals, which is why continuous wave radio operators still use it and why it remains a compact classroom example of symbolic encoding.

Visual practice is a useful first stage when the goal is to memorize the character set, especially before adding speed pressure. It should not be confused with copying audio at words per minute or sending cleanly with a key. Good Morse learning eventually connects the visible dot-dash pattern to the sound of the whole character, then to spacing between letters and words.

How to Use This Tool:

Use the quiz as a controlled recognition drill, then use the review panels to isolate the exact characters that caused trouble.

Choose Quiz set. Letters (A-Z) drills the 26 letters, Numbers (0-9) drills the ten digits, and Letters + Numbers (A-Z, 0-9) mixes both pools.
Select Number of questions. The available counts stay within the active pool, so a number-only round can use 5 or 10 prompts while a mixed round can cover up to 36 prompts.
Open Advanced if you want a repeatable session. Entering the same Random seed with the same quiz set and count recreates the same prompt order and answer choices.
If you switch from a mixed round to Numbers (0-9), recheck Number of questions because the valid count can drop to 10.
Press Start Quiz, read the displayed dot-dash pattern, and choose the matching character from the four answer buttons.
After answering, use the green and red feedback before pressing Next. This is the best moment to notice whether the miss came from mark order or mark count.
Do not treat a short multiple-choice score as audio-copy proof. Use the ledger to identify weak characters, then test again with a new seed or listening practice.
When the round finishes, review Your Score, % Correct, % Wrong, the overview cards, Morse Attempt Ledger, Morse Accuracy Chart, and JSON tab.
Use Retake (same seed) for a controlled retest, or Retake (new seed) when you want a fresh sample. Copy or download the ledger when you want to keep a study record.

Interpreting Results:

Your Score is the number of correct visual matches in the finished round. % Correct and % Wrong are rounded whole percentages, so small rounds can move sharply after one answer. A 4 / 5 result shows 80% correct, but that is still only five sampled characters.

The Morse Attempt Ledger is the most useful study artifact. A missed ... as H instead of S points to dot counting. A missed -.... as B points to confusion between a digit and a similar letter. A mistake on .- versus -. is more about order than count.

The Morse Accuracy Chart summarizes correct and incorrect answers, but the chart cannot explain why a mistake happened. Use it to see the overall split, then use the ledger to decide what to practice next. The chart exports are useful for a class record or progress journal, while the CSV, DOCX, and JSON outputs preserve the finished attempt in more detail.

A strong score does not prove audio copy skill, sending rhythm, punctuation knowledge, or operating readiness. It shows that the visual character patterns in the chosen pool are becoming more familiar. For stronger evidence, run full-pool rounds, repeat a weak seeded round after review, then change the seed to confirm that recognition carries over to a new order.

Technical Details:

International Morse assigns each supported character to a fixed sequence of dots and dashes. The quiz focuses on the core beginner subset: the 26 Latin letters and the ten digits. It does not ask about punctuation, accented letters, procedural signs, callsigns, abbreviations, word spacing, audio speed, or keying quality.

The timing model behind Morse is unit based. A dot is one unit, a dash is three units, the space between marks within one character is one unit, the space between two letters is three units, and the space between words is seven units. Visual recognition ignores real-time speed, but these ratios explain why a pattern is more than a simple graphic.

Scoring Formula

Each prompt is scored as either correct or incorrect. The percentage shown after a round is the rounded share of correct answers.

\begin{matrix} S & = & \sum_{i = 1}^{n} c_{i} \\ P & = & round (\frac{S}{n} \times 100) \\ W & = & 100 - P \end{matrix}

Here, S is the score, n is the number of prompts, c_i is 1 when the selected character is correct and 0 otherwise, P is the displayed correct percentage, and W is the displayed wrong percentage. For example, 8 correct answers in a 15-question round reports round(8 / 15 x 100) = 53% correct.

Letter and Digit Map

Morse code mappings used for letters and digits
Character	Pattern	Character	Pattern	Character	Pattern	Character	Pattern
A	`.-`	B	`-...`	C	`-.-.`	D	`-..`
E	`.`	F	`..-.`	G	`--.`	H	`....`
I	`..`	J	`.---`	K	`-.-`	L	`.-..`
M	`--`	N	`-.`	O	`---`	P	`.--.`
Q	`--.-`	R	`.-.`	S	`...`	T	`-`
U	`..-`	V	`...-`	W	`.--`	X	`-..-`
Y	`-.--`	Z	`--..`	0	`-----`	1	`.----`
2	`..---`	3	`...--`	4	`....-`	5	`.....`
6	`-....`	7	`--...`	8	`---..`	9	`----.`

Quiz Mechanics and Limits

Morse quiz mechanics and interpretation limits
Topic	Rule or behavior	Interpretation note
Active pools	Letters use 26 characters, numbers use 10 characters, and mixed practice uses all 36.	Separate pools reduce overload when one part of the codebook is still new.
Question draw	Each prompt is selected from the active pool without exceeding the chosen count.	Full-pool rounds give better coverage than short warm-ups.
Answer choices	Each prompt shows the correct character plus three distinct distractors from the same pool.	Distractors can reveal near misses, but they are still multiple choice.
Seeded replay	The same quiz set, question count, and seed reproduce the same prompts and answer choices.	Use this for before-and-after checks after reviewing missed patterns.
Morse timing	Dash length, internal mark gaps, letter gaps, and word gaps follow dot-unit ratios.	The visual quiz does not measure whether a learner can hear or send those ratios at speed.
Exports	The finished run can be copied or downloaded as a ledger, chart summary, document, or structured data.	Exports are study records, not certification of Morse operating skill.

Privacy and Accuracy Notes:

The quiz is generated in the browser and does not need a server-side Morse lookup. The displayed patterns are created from the selected character map, and the result exports are built from the finished round.

The current session can be represented in the page URL so a seeded quiz can be resumed or shared. That URL may include the selected set, seed, count, and answer state. Avoid putting private words, names, or class identifiers in the seed if you plan to share the link.

Accuracy is limited to the supported letter and digit map. The standard also contains punctuation and operating signs, and real continuous wave practice adds speed, tone, spacing, noise, fatigue, and sending consistency. Treat this as pattern recognition practice, then combine it with listening drills when the goal is usable Morse skill.

Advanced Tips:

Use Letters (A-Z) and Numbers (0-9) separately before mixed rounds if near matches such as B and 6 are still unstable.
Keep one Random seed for a weak round, study the missed rows in Morse Attempt Ledger, then retake the same seed before moving to a new order.
Use the Morse Accuracy Chart only for the round-level split. The chart cannot show whether the mistake was order, count, or character-family confusion.
Export CSV or DOCX for a readable study record, and use JSON when a finished run needs to be compared or archived in another system.
Pair visual pattern practice with listening drills once the letter and digit map feels familiar, because real Morse skill depends on sound and spacing.

Worked Examples:

Alphabet warm-up

A learner chooses Letters (A-Z) and 10 questions. The result is 7 / 10, and the ledger shows .... answered as S instead of H. The next study step is not the whole alphabet; it is careful counting of dot-only letters such as E, I, S, and H.

Digit cleanup

A student chooses Numbers (0-9) and misses 6 as B. The error is understandable because both begin with a dash and continue with dots. Repeating the same seed after reviewing 6 through 9 checks whether the longer digit patterns are more stable.

Mixed retest

After separate letter and digit practice, a learner chooses Letters + Numbers (A-Z, 0-9), 36 questions, and a memorable seed. The first pass becomes a baseline. A second pass with the same seed tests targeted improvement, and a later pass with a new seed tests whether recognition still holds without memorizing the order.

FAQ:

Does the quiz test audio Morse code?

No. It tests visual recognition of dot-dash patterns. Audio copy requires hearing complete characters as rhythms, not reading marks one by one.

Why do digits and letters get confused?

Several digit patterns resemble letter patterns with one extra mark. For example, B is -... and 6 is -..... The ledger shows exactly which side of that near match caused the miss.

How can I repeat the same round?

Use the same quiz set, question count, and random seed, or choose Retake (same seed) after finishing a run.

What should I export after a practice session?

Use CSV or DOCX when you want a readable attempt ledger, JSON when you want structured data, and the chart image or chart CSV when you only need the correct-versus-incorrect split.

Should beginners memorize dots and dashes visually?

Visual practice is useful for learning the map, but many Morse teachers encourage moving toward sound-based recognition. Pair visual quizzes with listening practice once the basic characters are familiar.

Glossary:

Dot: The short Morse mark and the base unit for Morse timing.
Dash: The long Morse mark, equal to three dot units in the standard timing model.
Dit and dah: The spoken or sounded names many operators use for dots and dashes during sending and learning.
International Morse: The standardized Morse system that defines the letter, digit, punctuation, and operating-sign patterns used in modern practice.
Continuous wave: A radio operating mode often associated with Morse code, where information is sent by switching a carrier signal on and off.
Random seed: A repeat value that recreates the same quiz order and answer choices when the other quiz settings stay the same.

References:

International Morse Code, Recommendation ITU-R M.1677-1, International Telecommunication Union, October 2009.
Tips For Learning Morse Code (CW), American Radio Relay League.

Morse Code Quiz

Your Score

Quiz status

{{ questionHeading }}

How to Use This Tool:

Interpreting Results:

Technical Details:

Scoring Formula

Letter and Digit Map

Quiz Mechanics and Limits

Privacy and Accuracy Notes:

Advanced Tips:

Worked Examples:

Alphabet warm-up

Digit cleanup

Mixed retest

FAQ:

Glossary:

References:

Morse Code Quiz

Your Score

Quiz status

{{ questionHeading }}

Introduction:

How to Use This Tool:

Interpreting Results:

Technical Details:

Scoring Formula

Letter and Digit Map

Quiz Mechanics and Limits

Privacy and Accuracy Notes:

Advanced Tips:

Worked Examples:

Alphabet warm-up

Digit cleanup

Mixed retest

FAQ:

Glossary:

References: