NCATT AET: AVIATION ELECTRONICS TECHNICIAN EXAM 2026/2027 | 100%
VERIFIED QUESTIONS CORRECT ANSWERS | NEWEST VERSION
Q1. What is the result of converting the binary number 1011 to decimal?
ANSWER : 11
Explanation: 1×2³ + 0×2² + 1×2¹ + 1×2⁰ = 8+0+2+1 = 11
Q2. What is the hexadecimal equivalent of the decimal number 255?
ANSWER : FF
Explanation: 255 ÷ 16 = 15 remainder 15; both digits are F in hex.
Q3. What is the value of 2⁸?
ANSWER : 256
Explanation: 2 raised to the 8th power equals 256.
Q4. Convert 10110011 binary to hexadecimal.
ANSWER : B3
Explanation: Split into nibbles: 1011=B, 0011=3; result is B3.
Q5. What is the two's complement of 00001010 (8-bit)?
ANSWER : 11110110
Explanation: Invert all bits: 11110101, then add 1: 11110110.
Q6. What is the result of XOR operation: 1100 XOR 1010?
ANSWER : 0110
Explanation: XOR returns 1 only when bits differ: 1100 XOR 1010 = 0110.
Q7. What is 0x1A + 0x06 in hexadecimal?
ANSWER : 0x20
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,Explanation: 1A (26) + 06 (6) = 32 decimal = 0x20.
Q8. How many bits are in one byte?
ANSWER : 8 bits
Explanation: By definition, one byte consists of 8 binary digits (bits).
Q9. What is the octal equivalent of binary 111000?
ANSWER : 70
Explanation: Split into groups of 3: 111=7, 000=0; result is 70 octal.
Q10. What is the result of the Boolean expression: A AND (NOT A)?
ANSWER : Always 0 (FALSE)
Explanation: A AND NOT A is always false by the complement law of Boolean
algebra.
Q11. What is the decimal value of the BCD number 0100 0111?
ANSWER : 47
Explanation: 0100=4 and 0111=7; BCD 0100 0111 = decimal 47.
Q12. A sine wave has a peak voltage of 170V. What is the RMS voltage?
ANSWER : 120.2 V
Explanation: VRMS = Vpeak × 0.707 = 170 × 0.707 ≈ 120.2 V.
Q13. What is the period of a 400 Hz signal?
ANSWER : 2.5 milliseconds
Explanation: T = 1/f = 1/400 = 0.0025 s = 2.5 ms.
Q14. Convert -7 to an 8-bit two's complement binary number.
ANSWER : 11111001
Explanation: +7 = 00000111; invert = 11111000; add 1 = 11111001.
Q15. What is the result of 1010 AND 1100?
ANSWER : 1000
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,Explanation: AND requires both bits to be 1: 1010 AND 1100 = 1000.
Q16. What is the result of 1010 OR 1100?
ANSWER : 1110
Explanation: OR returns 1 if either bit is 1: 1010 OR 1100 = 1110.
Q17. How many unique values can a 10-bit binary number represent?
ANSWER : 1024
Explanation: 2¹⁰ = 1024 unique values (0 through 1023).
Q18. What is the frequency of a signal with a wavelength of 0.75 meters
traveling at the speed of light?
ANSWER : 400 MHz
Explanation: f = c/λ = 3×10⁸ / 0.75 = 4×10⁸ Hz = 400 MHz.
Q19. What is the average value of a full-wave rectified sine wave with a peak
of 100V?
ANSWER : 63.7 V
Explanation: Vavg = 2 × Vpeak / π = 2 × 100 / π ≈ 63.7 V.
Q20. What is the result of the NOT operation on 10110100?
ANSWER : 01001011
Explanation: NOT inverts every bit: 10110100 becomes 01001011.
PHYSICS
Q21. What is the speed of light in a vacuum?
ANSWER : 3 × 10⁸ meters per second (approximately 186,000 miles per second)
Explanation: The speed of light c = 2.998 × 10⁸ m/s, commonly approximated as
3×10⁸ m/s.
Q22. What is Ohm's Law?
ANSWER : V = I × R (Voltage equals Current multiplied by Resistance)
Page 3 | 300 Questions & Answers | All Rights Reserved
, Explanation: Ohm's Law states that voltage across a conductor is directly
proportional to the current through it.
Q23. What is the unit of electrical capacitance?
ANSWER : Farad (F)
Explanation: Named after Michael Faraday; the farad measures capacitance
(charge stored per volt).
Q24. What is the unit of inductance?
ANSWER : Henry (H)
Explanation: Named after Joseph Henry; the henry measures the ability of a
conductor to store energy in a magnetic field.
Q25. What happens to resistance when temperature increases for most
conductors?
ANSWER : Resistance increases
Explanation: For most metallic conductors, resistance increases with temperature
due to increased atomic vibrations.
Q26. What is electromagnetic induction?
ANSWER : The generation of an electromotive force (EMF) when a conductor
moves through a magnetic field or when a magnetic field changes around a
conductor
Explanation: Faraday's Law describes electromagnetic induction, the principle
behind generators and transformers.
Q27. What is the formula for electrical power?
ANSWER : P = V × I (Power = Voltage × Current)
Explanation: Power can also be expressed as P = I²R or P = V²/R.
Q28. What is the skin effect in RF conductors?
ANSWER : The tendency of alternating current to flow near the outer surface of a
conductor at higher frequencies
Explanation: Skin effect increases effective resistance at high frequencies, which
is why RF cables use silver plating.
Page 4 | 300 Questions & Answers | All Rights Reserved
VERIFIED QUESTIONS CORRECT ANSWERS | NEWEST VERSION
Q1. What is the result of converting the binary number 1011 to decimal?
ANSWER : 11
Explanation: 1×2³ + 0×2² + 1×2¹ + 1×2⁰ = 8+0+2+1 = 11
Q2. What is the hexadecimal equivalent of the decimal number 255?
ANSWER : FF
Explanation: 255 ÷ 16 = 15 remainder 15; both digits are F in hex.
Q3. What is the value of 2⁸?
ANSWER : 256
Explanation: 2 raised to the 8th power equals 256.
Q4. Convert 10110011 binary to hexadecimal.
ANSWER : B3
Explanation: Split into nibbles: 1011=B, 0011=3; result is B3.
Q5. What is the two's complement of 00001010 (8-bit)?
ANSWER : 11110110
Explanation: Invert all bits: 11110101, then add 1: 11110110.
Q6. What is the result of XOR operation: 1100 XOR 1010?
ANSWER : 0110
Explanation: XOR returns 1 only when bits differ: 1100 XOR 1010 = 0110.
Q7. What is 0x1A + 0x06 in hexadecimal?
ANSWER : 0x20
Page 1 | 300 Questions & Answers | All Rights Reserved
,Explanation: 1A (26) + 06 (6) = 32 decimal = 0x20.
Q8. How many bits are in one byte?
ANSWER : 8 bits
Explanation: By definition, one byte consists of 8 binary digits (bits).
Q9. What is the octal equivalent of binary 111000?
ANSWER : 70
Explanation: Split into groups of 3: 111=7, 000=0; result is 70 octal.
Q10. What is the result of the Boolean expression: A AND (NOT A)?
ANSWER : Always 0 (FALSE)
Explanation: A AND NOT A is always false by the complement law of Boolean
algebra.
Q11. What is the decimal value of the BCD number 0100 0111?
ANSWER : 47
Explanation: 0100=4 and 0111=7; BCD 0100 0111 = decimal 47.
Q12. A sine wave has a peak voltage of 170V. What is the RMS voltage?
ANSWER : 120.2 V
Explanation: VRMS = Vpeak × 0.707 = 170 × 0.707 ≈ 120.2 V.
Q13. What is the period of a 400 Hz signal?
ANSWER : 2.5 milliseconds
Explanation: T = 1/f = 1/400 = 0.0025 s = 2.5 ms.
Q14. Convert -7 to an 8-bit two's complement binary number.
ANSWER : 11111001
Explanation: +7 = 00000111; invert = 11111000; add 1 = 11111001.
Q15. What is the result of 1010 AND 1100?
ANSWER : 1000
Page 2 | 300 Questions & Answers | All Rights Reserved
,Explanation: AND requires both bits to be 1: 1010 AND 1100 = 1000.
Q16. What is the result of 1010 OR 1100?
ANSWER : 1110
Explanation: OR returns 1 if either bit is 1: 1010 OR 1100 = 1110.
Q17. How many unique values can a 10-bit binary number represent?
ANSWER : 1024
Explanation: 2¹⁰ = 1024 unique values (0 through 1023).
Q18. What is the frequency of a signal with a wavelength of 0.75 meters
traveling at the speed of light?
ANSWER : 400 MHz
Explanation: f = c/λ = 3×10⁸ / 0.75 = 4×10⁸ Hz = 400 MHz.
Q19. What is the average value of a full-wave rectified sine wave with a peak
of 100V?
ANSWER : 63.7 V
Explanation: Vavg = 2 × Vpeak / π = 2 × 100 / π ≈ 63.7 V.
Q20. What is the result of the NOT operation on 10110100?
ANSWER : 01001011
Explanation: NOT inverts every bit: 10110100 becomes 01001011.
PHYSICS
Q21. What is the speed of light in a vacuum?
ANSWER : 3 × 10⁸ meters per second (approximately 186,000 miles per second)
Explanation: The speed of light c = 2.998 × 10⁸ m/s, commonly approximated as
3×10⁸ m/s.
Q22. What is Ohm's Law?
ANSWER : V = I × R (Voltage equals Current multiplied by Resistance)
Page 3 | 300 Questions & Answers | All Rights Reserved
, Explanation: Ohm's Law states that voltage across a conductor is directly
proportional to the current through it.
Q23. What is the unit of electrical capacitance?
ANSWER : Farad (F)
Explanation: Named after Michael Faraday; the farad measures capacitance
(charge stored per volt).
Q24. What is the unit of inductance?
ANSWER : Henry (H)
Explanation: Named after Joseph Henry; the henry measures the ability of a
conductor to store energy in a magnetic field.
Q25. What happens to resistance when temperature increases for most
conductors?
ANSWER : Resistance increases
Explanation: For most metallic conductors, resistance increases with temperature
due to increased atomic vibrations.
Q26. What is electromagnetic induction?
ANSWER : The generation of an electromotive force (EMF) when a conductor
moves through a magnetic field or when a magnetic field changes around a
conductor
Explanation: Faraday's Law describes electromagnetic induction, the principle
behind generators and transformers.
Q27. What is the formula for electrical power?
ANSWER : P = V × I (Power = Voltage × Current)
Explanation: Power can also be expressed as P = I²R or P = V²/R.
Q28. What is the skin effect in RF conductors?
ANSWER : The tendency of alternating current to flow near the outer surface of a
conductor at higher frequencies
Explanation: Skin effect increases effective resistance at high frequencies, which
is why RF cables use silver plating.
Page 4 | 300 Questions & Answers | All Rights Reserved
