Aha Trivia Stuff Everyone Should Know

Free practice tests · Kids & Youth

Stuff Every Signals Scout Should Know: free practice in 30-second cards

Stuff Every Signals Scout Should Know

Practice facts for the Signs, Signals, and Codes merit badge. Not an official Scouting America credential.

Start Stuff Every Signals Scout Should Know ⚡ Today's sprint 🎙️ Voice mode

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Free to start, no sign-up. 59 cards so far. One Knowledge Score and day streak across all your courses.

Questions people ask

Is this practice test free?

Yes. The first 50 cards are free for everyone with no sign-up, each with the answer, why it is right and its sources. Aha Trivia members get all 59 cards and timed practice exams.

How many practice questions are there?

59 practice questions so far. Each one is a 3-choice card that takes about 30 seconds, and the course grows as new cards pass our source checks.

Where do the answers come from?

Every card lists the sources it was checked against, and each answer explains why it is right. If you think an answer is wrong, tap "Challenge this answer" in the game and it gets reviewed.

Can I study in the car?

Yes. Voice mode reads the questions out loud and you answer by voice.

Try 3 cards

  1. What does Morse code use to stand for letters and numbers?
    Show the answer

    Short and long signals called dits and dahs. Morse encodes text as sequences of two signal lengths, dots and dashes, also called dits and dahs.

  2. In Morse timing, how long is a dah compared with a dit?
    Show the answer

    Three times as long. A dah lasts three times the duration of a dit, which helps keep the rhythm steady.

  3. Which letter has the shortest Morse code, a single dit?
    Show the answer

    The letter E. E is the most common letter in English, so it gets the shortest code, one dit.

All 59 practice questions

The first 50 are free, with the answer, why it's right and the official sources. The other 9 (🔒) open with a membership (every test). Or play them as a game and track what you've learned.

Show all 59 questions
  1. What does Morse code use to stand for letters and numbers?
  2. In Morse timing, how long is a dah compared with a dit?
  3. Which letter has the shortest Morse code, a single dit?
  4. How long is the silence between letters in Morse code?
  5. How many dits of silence separate two words in Morse?
  6. Besides radio, what is one way Morse code can be sent?
  7. What does the SOS distress signal mean when sent in Morse?
  8. How is the SOS signal keyed in Morse code?
  9. What does the Morse abbreviation CQ mean to operators?
  10. What does the Morse Q code QTH stand for?
  11. Why is Morse code useful in noisy radio conditions?
  12. What does a pilot hear from a navigation station sending Morse letters?
  13. How can Morse code help people with severe disabilities communicate?
  14. What is one way Morse code has been sent in mine rescues?
  15. What does the Farnsworth method do when teaching Morse?
  16. What is semaphore used for?
  17. How are semaphore flags different from nautical flags?
  18. What is American Sign Language described as having?
  19. What does braille let people with sight impairment do?
  20. What does a topographical map legend explain?
  21. Why do people use text-message symbols and emoticons?
  22. What is cryptography the practice of?
  23. What does a cipher wheel do to a message?
  24. On a cipher wheel, what does the key letter do?
  25. Why did armies like cipher wheels for secret messages?
  26. What does the umpire's safe signal mean?
  27. What does the do not pitch signal tell the pitcher?
  28. What does the play ball signal tell the pitcher?
  29. What does the fair ball signal mean?
  30. What does the timeout or foul ball signal mean?
  31. What does a foul tip signal mean?
  32. What do aircraft carrier deck crews use hand signals for?
  33. Generally, what does the number of sides on a traffic sign suggest?
  34. What does a trail sign help a patrol do?
  35. Why should trail markers be returned or replaced after a hike?
  36. What are silent Scout signals used for?
  37. Why are sound signals useful in emergencies?
  38. What is one drawback of sound signals compared with visual signals?
  39. What did the ancient Greeks use to send messages long distances?
  40. What is one benefit of Morse code for low-power radio operators?
  41. What does the @ symbol's Morse code help people send?
  42. What does a Morse code prosign convey during a message?
  43. What does a Morse code operator call the unique rhythm of an individual sender?
  44. What does the Morse prosign SK tell the other operator?
  45. What does the Morse abbreviation OM mean between operators?
  46. What does the Morse abbreviation YL mean?
  47. Why do Morse operators use abbreviations like QTH and OM?
  48. What is the dit duration at 20 words per minute using the PARIS standard?
  49. What is the Koch method of learning Morse code known for?
  50. What does the Morse code for V sound like in rhythm?
  51. What is the Morse code for the letter Q often remembered by? 🔒
  52. What does the Morse code for F sound like when spoken? 🔒
  53. What does the letter L sound like when spoken in Morse? 🔒
  54. What does the Morse code for the letter V stand for in wartime Britain? 🔒
  55. What does the Morse code for the ampersand ES also mean? 🔒
  56. What is a straight key used for in Morse code? 🔒
  57. What are mechanical semi-automatic Morse keys informally called? 🔒
  58. What does the Morse code for the letter O look like? 🔒
  59. What does the Morse code for the letter S sound like? 🔒