2A654 CDC Questions and Answers with
Certified Solutions
What is the primary function of an aircraft's airframe?
✔✔To support all structural components of the aircraft
What does the term "hydraulic system" refer to in aircraft maintenance?
✔✔A system used to power various flight control surfaces and landing gear
What is the purpose of the aircraft's landing gear system?
✔✔To provide support during ground operations and absorb shock during landing
What does the "flight control" system do in an aircraft?
✔✔It allows the pilot to control the pitch, roll, and yaw of the aircraft
What should be checked during a pre-flight inspection of an aircraft?
✔✔Ensure that all critical systems such as hydraulics, fuel, and flight controls are functioning
properly
1
,How do aircraft engines generate thrust?
✔✔By expelling high-speed exhaust gases produced by the combustion of fuel
What is the primary function of the aircraft's electrical system?
✔✔To provide power for avionics, lighting, and other critical systems on the aircraft
What are the most common types of aircraft materials used for construction?
✔✔Aluminum, composite materials, and titanium
How are hydraulic fluid levels monitored in aircraft systems?
✔✔By checking the reservoir and ensuring it is within the recommended range
What safety precautions should be taken when working on aircraft fuel systems?
✔✔Ensure that there are no open flames or sparks near the fuel systems and use proper
grounding techniques
What is the role of the aircraft's pressurization system?
✔✔To maintain a safe and comfortable cabin pressure during flight
2
,What is the function of the aircraft's environmental control system?
✔✔To regulate the temperature, humidity, and air quality inside the aircraft cabin
What should be done if an aircraft tire shows signs of excessive wear?
✔✔Replace the tire to ensure the aircraft’s safe operation during takeoff and landing
How is an aircraft’s avionics system tested?
✔✔By performing diagnostic checks to ensure all communication, navigation, and flight control
systems are functioning
Why is it important to ensure aircraft weight and balance are within limits?
✔✔To ensure safe handling and control of the aircraft during flight
What must be checked during an aircraft's engine inspection?
✔✔Check for leaks, verify oil levels, inspect belts and hoses for wear, and test engine
performance
3
, How should aircraft parts be cleaned to prevent damage?
✔✔Use non-abrasive cleaners and follow the manufacturer's guidelines for cleaning each part
What is the purpose of the aircraft's oxygen system?
✔✔To provide breathable oxygen to the crew and passengers in high-altitude flight conditions
What does the term "airframe structure" include in aircraft maintenance?
✔✔The fuselage, wings, empennage, and landing gear of the aircraft
What action is required if the aircraft's flight control surfaces are found to be damaged?
✔✔Repair or replace the damaged components before further flight
How is aircraft corrosion detected?
✔✔By inspecting metal surfaces for discoloration, pitting, or signs of wear
What is the function of the aircraft’s fuel system?
✔✔To store, filter, and deliver fuel to the engines during flight
4
Certified Solutions
What is the primary function of an aircraft's airframe?
✔✔To support all structural components of the aircraft
What does the term "hydraulic system" refer to in aircraft maintenance?
✔✔A system used to power various flight control surfaces and landing gear
What is the purpose of the aircraft's landing gear system?
✔✔To provide support during ground operations and absorb shock during landing
What does the "flight control" system do in an aircraft?
✔✔It allows the pilot to control the pitch, roll, and yaw of the aircraft
What should be checked during a pre-flight inspection of an aircraft?
✔✔Ensure that all critical systems such as hydraulics, fuel, and flight controls are functioning
properly
1
,How do aircraft engines generate thrust?
✔✔By expelling high-speed exhaust gases produced by the combustion of fuel
What is the primary function of the aircraft's electrical system?
✔✔To provide power for avionics, lighting, and other critical systems on the aircraft
What are the most common types of aircraft materials used for construction?
✔✔Aluminum, composite materials, and titanium
How are hydraulic fluid levels monitored in aircraft systems?
✔✔By checking the reservoir and ensuring it is within the recommended range
What safety precautions should be taken when working on aircraft fuel systems?
✔✔Ensure that there are no open flames or sparks near the fuel systems and use proper
grounding techniques
What is the role of the aircraft's pressurization system?
✔✔To maintain a safe and comfortable cabin pressure during flight
2
,What is the function of the aircraft's environmental control system?
✔✔To regulate the temperature, humidity, and air quality inside the aircraft cabin
What should be done if an aircraft tire shows signs of excessive wear?
✔✔Replace the tire to ensure the aircraft’s safe operation during takeoff and landing
How is an aircraft’s avionics system tested?
✔✔By performing diagnostic checks to ensure all communication, navigation, and flight control
systems are functioning
Why is it important to ensure aircraft weight and balance are within limits?
✔✔To ensure safe handling and control of the aircraft during flight
What must be checked during an aircraft's engine inspection?
✔✔Check for leaks, verify oil levels, inspect belts and hoses for wear, and test engine
performance
3
, How should aircraft parts be cleaned to prevent damage?
✔✔Use non-abrasive cleaners and follow the manufacturer's guidelines for cleaning each part
What is the purpose of the aircraft's oxygen system?
✔✔To provide breathable oxygen to the crew and passengers in high-altitude flight conditions
What does the term "airframe structure" include in aircraft maintenance?
✔✔The fuselage, wings, empennage, and landing gear of the aircraft
What action is required if the aircraft's flight control surfaces are found to be damaged?
✔✔Repair or replace the damaged components before further flight
How is aircraft corrosion detected?
✔✔By inspecting metal surfaces for discoloration, pitting, or signs of wear
What is the function of the aircraft’s fuel system?
✔✔To store, filter, and deliver fuel to the engines during flight
4
