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30/09/2026

⚡✈️ EASA PART-66 DAILY MODULE EXAM

MODULE 5 — DIGITAL TECHNIQUES / ELECTRONIC INSTRUMENT SYSTEMS

DAY 3 | QUESTIONS 21–30

Complete the final 10 questions of Module 5 before the Day 4 Answer Reveal.

Q21. What is the primary function of a digital counter?

A. Count pulses or events
B. Convert analog signals to digital signals
C. Store aircraft fuel
D. Generate hydraulic pressure

Q22. What is sampling in a digital system?

A. Measuring an analog signal at regular intervals
B. Storing a digital signal permanently
C. Converting binary numbers into hexadecimal automatically
D. Increasing electrical resistance

Q23. What is quantization in digital signal conversion?

A. Assigning sampled signal values to discrete levels
B. Increasing the frequency of an analog signal
C. Converting digital data into mechanical movement
D. Removing all electrical noise

Q24. What is firmware?

A. Software stored in a device to control its operation
B. A type of electrical cable
C. A mechanical aircraft component
D. A method of measuring voltage

Q25. What is the purpose of software configuration management?

A. Control and document approved software versions and changes
B. Increase aircraft electrical power
C. Convert analog signals to mechanical movement
D. Store hydraulic fluid

Q26. What is a common precaution when handling sensitive electronic components?

A. Use proper ESD protection
B. Increase the supply voltage
C. Remove all grounding connections
D. Handle components with wet hands

Q27. What does electromagnetic interference (EMI) refer to?

A. Unwanted electromagnetic energy that can affect electronic equipment
B. A method of storing digital information
C. A type of computer memory
D. A method of converting binary numbers

Q28. What is the primary purpose of electrical shielding?

A. Reduce the effects of electromagnetic interference
B. Increase electrical resistance
C. Store digital information
D. Convert AC voltage into mechanical energy

Q29. How does a fibre-optic system transmit information?

A. By using pulses of light
B. By using hydraulic pressure
C. By using mechanical vibration only
D. By storing electrical charge

Q30. What is an integrated circuit (IC)?

A. Multiple electronic components integrated into a single semiconductor package
B. A mechanical aircraft switch
C. A type of hydraulic valve
D. A battery charging device

🎯 YOUR CHALLENGE

Answer Questions 21–30 and complete your Module 5 challenge!

How many can you get right? ✈️

Comment your answers below! 👇

📌 Answer Reveal: DAY 4

Practice questions are for educational and review purposes only and are not official EASA examination questions.

30/09/2026

⚡✈️ EASA PART-66 DAILY MODULE EXAM

MODULE 5 — DIGITAL TECHNIQUES / ELECTRONIC INSTRUMENT SYSTEMS

DAY 2 | QUESTIONS 11–20

Continue your Module 5 review with Questions 11–20.

Q11. Which logic gate produces a HIGH output when at least one input is HIGH?

A. AND
B. OR
C. NOT
D. XOR

Q12. What is the function of a NOT gate?

A. Invert the input signal
B. Store digital data
C. Combine multiple inputs
D. Convert analog signals to digital

Q13. Which logic gate produces a LOW output only when all of its inputs are HIGH?

A. OR
B. XOR
C. NAND
D. NOT

Q14. What is the main purpose of an XOR gate?

A. Produce a HIGH output when its inputs are different
B. Produce a HIGH output only when all inputs are HIGH
C. Always produce a LOW output
D. Store binary information

Q15. What is a flip-flop primarily used for?

A. Storing one bit of digital information
B. Converting AC to DC
C. Amplifying an analog signal
D. Measuring electrical resistance

Q16. What is a digital register?

A. A group of flip-flops used to store binary data
B. A device used to convert AC voltage
C. A type of aircraft display
D. A device used to measure current

Q17. What is the primary function of an encoder in a digital system?

A. Convert an active input into a coded output
B. Store electrical energy
C. Increase signal voltage
D. Convert digital data into analog voltage

Q18. What is a multiplexer used for?

A. Select one of several input signals and connect it to an output
B. Store permanent software
C. Measure aircraft altitude
D. Convert light into electrical energy

Q19. What is the primary function of a demultiplexer?

A. Route one input signal to a selected output
B. Convert AC into DC
C. Store multiple binary numbers permanently
D. Amplify electrical power

Q20. What is the purpose of a parity bit in digital data?

A. Help detect certain data transmission errors
B. Increase transmission voltage
C. Store an entire data word
D. Convert binary data into analog data

🎯 YOUR CHALLENGE

Answer Questions 11–20 and test your Module 5 knowledge!

How many can you get right? ✈️

Comment your answers below! 👇

📌 Answer Reveal: DAY 4

Practice questions are for educational and review purposes only and are not official EASA examination questions.

30/09/2026

⚡✈️ EASA PART-66 DAILY MODULE EXAM

MODULE 5 — DIGITAL TECHNIQUES / ELECTRONIC INSTRUMENT SYSTEMS

DAY 1 | QUESTIONS 1–10

Test your knowledge of Module 5 — Digital Techniques / Electronic Instrument Systems.
QUESTIONS 1–10

Q1. Which numbering system uses only the digits 0 and 1?

A. Decimal
B. Binary
C. Octal
D. Hexadecimal

Q2. How many different digits are used in the hexadecimal numbering system?

A. 8
B. 10
C. 12
D. 16

Q3. What is the binary equivalent of decimal 5?

A. 101
B. 110
C. 111
D. 100

Q4. What is the main purpose of an Analog-to-Digital Converter (ADC)?

A. Convert digital signals into analog signals
B. Convert analog signals into digital data
C. Amplify electrical power
D. Store mechanical energy

Q5. What is the main purpose of a Digital-to-Analog Converter (DAC)?

A. Convert analog signals into digital data
B. Convert digital data into an analog signal
C. Convert AC into DC
D. Increase electrical resistance

Q6. What is a data bus primarily used for in an aircraft electronic system?

A. Transporting digital data between connected systems
B. Supplying hydraulic pressure
C. Cooling electronic components
D. Storing fuel

Q7. Which logic gate produces a HIGH output only when all of its inputs are HIGH?

A. OR
B. NOT
C. AND
D. XOR

Q8. What is the primary function of a CPU in a computer system?

A. Process instructions and data
B. Store fuel
C. Generate hydraulic pressure
D. Convert AC voltage

Q9. Which type of memory normally loses its stored data when electrical power is removed?

A. ROM
B. RAM
C. PROM
D. Non-volatile memory

Q10. What is the primary purpose of an aircraft electronic display system?

A. Present information to the flight crew
B. Increase engine thrust
C. Store hydraulic fluid
D. Control cabin temperature directly

🎯 YOUR CHALLENGE

Answer Questions 1–10 and test your Module 5 knowledge!

How many can you get right? ✈️

Comment your answers below! 👇

📌 Answer Reveal: DAY 4

Practice questions are for educational and review purposes only and are not official EASA examination questions.

24/09/2026

⚡✈️ MODULE 4 COMPLETE!

You've made it through all 30 questions of our EASA Part-66 Daily Module Exam — Module 4: Electronics Fundamentals.

Now it's time to review the answers and understand the concepts behind them. 📚
From semiconductors and diodes to transistors, digital electronics, servo mechanisms, and aircraft bonding, every question is an opportunity to strengthen your knowledge.

🎯 How did you score out of 30?

Comment your final score below! 👇

📌 Save this post for your Module 4 review.

12/09/2026

03/09/2026

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