Free practice tests · Kids & Youth
Stuff Every Electronics Scout Should Know: free practice in 30-second cards
Stuff Every Electronics Scout Should Know
Practice facts for the Electronics merit badge. Not an official Scouting America credential.
Start Stuff Every Electronics Scout Should Know ⚡ Today's sprint 🎙️ Voice mode
Free to start, no sign-up. 50 cards so far. One Knowledge Score and day streak across all your courses.
Questions people ask
Is this practice test free?
Yes. All 50 cards are free with no sign-up, each with the answer, why it is right and its sources.
How many practice questions are there?
50 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
- What should you do before soldering or repairing an electronic device?
Show the answer
Describe and follow safety precautions. Safety precautions protect you from burns, shocks, and damage. Learn and follow them before using, building, altering, or repairing electronics.
- Which symbol set shows resistors, capacitors, and transistors correctly?
Show the answer
A schematic diagram. Schematics use standard symbols for parts like resistors, capacitors, and transistors so others can read and build the circuit.
- Why label every part on a schematic diagram?
Show the answer
So others can identify each component. Labels tell readers which part is which, making the diagram clear and usable for building or troubleshooting.
All 50 practice questions
Each one has the answer, why it's right, and the official sources. Or play them as a game and track what you've learned.
Show all 50 questions
- What should you do before soldering or repairing an electronic device?
- Which symbol set shows resistors, capacitors, and transistors correctly?
- Why label every part on a schematic diagram?
- What is an active component such as a transistor able to do?
- What is the function of a printed circuit board?
- What are the basic principles of digital logic based on?
- Which is an analog application of electronics?
- What is another analog application besides amplification?
- What does the binary system use to show logical status?
- What is the decimal number 5 in binary?
- What is binary 110 in decimal?
- Which project choice involves a control device?
- What should you explain about a circuit you build?
- What does Ohm's law relate?
- How do resistor color bands help you?
- What is a feature of through-hole assembly?
- What is an advantage of surface mount technology?
- Why might a board use both through-hole and surface mount parts?
- Which career uses electronics skills?
- What should you research for a chosen electronics career?
- What else should you research about a career besides training?
- What does electronics study and apply?
- What can electronics convert alternating current into?
- What does the semiconductor industry drive?
- What was the first semiconductor device?
- What did vacuum tubes enable early electronics to do?
- What did the first working point-contact transistor use?
- What advantage did the MOSFET bring?
- What problem did the integrated circuit solve?
- What is digital logic the basis of?
- Why must heat be removed from electronic circuitry?
- What are heat sinks and fans used for?
- What is electronic noise?
- How can some electromagnetically or thermally generated noise be reduced?
- What materials are modern printed circuit boards often made from?
- What does a resistor do in a circuit?
- What does a capacitor do?
- What is an integrated circuit?
- Why should you avoid too much heat when soldering components?
- What is the purpose of desoldering?
- How can electronics be used for a control purpose?
- What is binary 1010 in decimal?
- What is decimal 9 in binary?
- Why is test equipment needed in electronics?
- Why is laboratory experimentation important in electronics?
- What is the most widely manufactured electronic device?
- What do logic gates range from?
- What does analog circuitry use for signal processing?
- What does a voltage comparator output?
- What can electronics convert analog signals into?