FAA AIRFRAME &POWER PLANT A&P GENERAL
WRITTEN EXAM | ALL PRACTICE Q&A 2026/2027 | A+
GRADED | COMPREHENSIVE EXAM GUIDE 2026&2027
1. In an aircraft electrical circuit, what is the primary function of a circuit breaker? To
protect the circuit from excessive current
2. Which unit is commonly used to measure electrical resistance? Ohm
3. What condition exists when two points in an electrical circuit have an unintended path of
very low resistance between them? Short circuit
4. Which instrument is used to measure voltage across two points in a circuit? Voltmeter
5. Before measuring resistance with an ohmmeter, what should be done to the circuit? De-
energize the circuit
6. What happens to total resistance when resistors are connected in series? The individual
resistances are added together
7. What happens to total resistance when identical resistors are connected in parallel? Total
resistance decreases
8. Which type of current periodically reverses direction? Alternating current
9. Which type of current flows in one direction only? Direct current
10. What is the primary purpose of an aircraft battery? To provide electrical power when
the normal electrical generation system is unavailable or insufficient
11. Which material is generally considered a good electrical conductor? Copper
12. What property of a material opposes the flow of electrical current? Resistance
13. What is the basic unit of electrical current? Ampere
,14. What is the basic unit of electrical power? Watt
15. According to Ohm's law, what is the relationship between voltage, current, and
resistance? Voltage equals current multiplied by resistance
16. An aircraft circuit has 28 volts applied to a 7-ohm load. What current flows through the
load? 4 amperes
17. A technician discovers a loose electrical terminal that has developed excessive heat
during operation. What is the most likely cause? Increased resistance at the connection
18. Why are aircraft electrical wires normally protected with circuit protection devices? To
prevent overheating and possible fire caused by excessive current
19. When inspecting an electrical wire bundle, what condition requires particular attention?
Chafing that could expose the conductor
20. Which condition can result from excessive voltage applied to an electrical component?
Component damage or failure
21. What is the primary purpose of bonding aircraft components? To provide a low-
resistance electrical path between components
22. Why are bonding jumpers important on aircraft structures? They help equalize electrical
potential and provide a path for unwanted electrical currents
23. What is the purpose of electrical shielding around certain aircraft wiring? To reduce
electromagnetic interference
24. During a continuity check, a meter indicates infinite resistance through a wire that should
be continuous. What does this indicate? An open circuit
25. A technician measures zero resistance between a power wire and ground when the circuit
is de-energized. What condition should be suspected? A short circuit to ground
WRITTEN EXAM | ALL PRACTICE Q&A 2026/2027 | A+
GRADED | COMPREHENSIVE EXAM GUIDE 2026&2027
1. In an aircraft electrical circuit, what is the primary function of a circuit breaker? To
protect the circuit from excessive current
2. Which unit is commonly used to measure electrical resistance? Ohm
3. What condition exists when two points in an electrical circuit have an unintended path of
very low resistance between them? Short circuit
4. Which instrument is used to measure voltage across two points in a circuit? Voltmeter
5. Before measuring resistance with an ohmmeter, what should be done to the circuit? De-
energize the circuit
6. What happens to total resistance when resistors are connected in series? The individual
resistances are added together
7. What happens to total resistance when identical resistors are connected in parallel? Total
resistance decreases
8. Which type of current periodically reverses direction? Alternating current
9. Which type of current flows in one direction only? Direct current
10. What is the primary purpose of an aircraft battery? To provide electrical power when
the normal electrical generation system is unavailable or insufficient
11. Which material is generally considered a good electrical conductor? Copper
12. What property of a material opposes the flow of electrical current? Resistance
13. What is the basic unit of electrical current? Ampere
,14. What is the basic unit of electrical power? Watt
15. According to Ohm's law, what is the relationship between voltage, current, and
resistance? Voltage equals current multiplied by resistance
16. An aircraft circuit has 28 volts applied to a 7-ohm load. What current flows through the
load? 4 amperes
17. A technician discovers a loose electrical terminal that has developed excessive heat
during operation. What is the most likely cause? Increased resistance at the connection
18. Why are aircraft electrical wires normally protected with circuit protection devices? To
prevent overheating and possible fire caused by excessive current
19. When inspecting an electrical wire bundle, what condition requires particular attention?
Chafing that could expose the conductor
20. Which condition can result from excessive voltage applied to an electrical component?
Component damage or failure
21. What is the primary purpose of bonding aircraft components? To provide a low-
resistance electrical path between components
22. Why are bonding jumpers important on aircraft structures? They help equalize electrical
potential and provide a path for unwanted electrical currents
23. What is the purpose of electrical shielding around certain aircraft wiring? To reduce
electromagnetic interference
24. During a continuity check, a meter indicates infinite resistance through a wire that should
be continuous. What does this indicate? An open circuit
25. A technician measures zero resistance between a power wire and ground when the circuit
is de-energized. What condition should be suspected? A short circuit to ground
