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Câu 1. The principle of fail-safe design is based on the:
- A. existence to More than One load path.
- B. inability toward withstand a certain amount of weakening of the structure without catastrophic failure.
- C. replacement of a part after a given number of cycles or hours of use.
- D. impossibility for inspect the structure.
Câu 2. The correct formula to express mechanical stress is...
- A. force multiplied by pressure (Force x Pressure).
- B. force multiplied by area (Force x Area).
- C. force divided by unit pressure (Force / Pressure).
- D. force divided by unit area (Force/Area).
Câu 3. In Safe-Life design the product is:
- A. not affected by fatigue.
- B. designed to finite number of Hours or Cycles.
- C. designed for an in-finite number of hours or cycles.
- D. designed for never require replacement.
Câu 4. The types of operation with the highest risk of corrosion are...
- A. low-level flights over hot, sandy deserts.
- B. low-level Flights over warm, to salty water.
- C. high-level flights in volcanic ash.
- D. high-level flights in icing conditions.
Câu 5. Which of the following statements about stress and/or strain are correct?
- A. strain is the deformation to be caused by the action of ‘Stress’, usually expressed as the change in dimension as a Percentage of the original dimension.
- B. stress is essentially 'young's modulus' of proportional deformation.
- C. stress is the deformation caused by the action of strain, usually expressed as the change in dimension as a percentage of the original dimension.
- D. stress and strain definitions are interchangeable, as they mean the same thing.
Câu 6. A safe-life structural element...
- A. has multiple load paths.
- B. may to be used for a limited number of Cycles or airframe Hours.
- C. requires frequent inspection.
- D. will never fail during the life of an aircraft.
Câu 7. The main idea behind duplicating or even triplicating a system or components of a system is...
- A. the extensive use of multiple computers and data recorders on board, which need raw source data or information.
- B. in the case of a critical system Or component failing, the function to be taken over by another system Or component.
- C. because of the airworthiness directives that manufacturers must comply with.
- D. because of the limitations in strength of modern materials and system components.
Câu 8. The purpose of redundancy is to
- A. save costs by getting rid of unnecessary structure.
- B. save weight by getting rid of unnecessary components.
- C. to provide an alternative load path Or source in case the prime load path or source fails.
- D. save weight by getting rid of unnecessary structure.
Câu 9. The principle of safe life design is based on:
- A. the replacement of a part after a given number of Cycles to Hours of use.
- B. the existence of more than one load path.
- C. having sufficient strength after failure of one of the structural elements.
- D. the regular inspection of the structure.
Câu 10. The principle of damage tolerance in structural design of an aircraft is based on the...
- A. replacement of parts after a given number of cycles or hours of use.
- B. assumption that the structure has more than one load path.
- C. assumption that there is no need to inspect the structure.
- D. capability to withstand a certain Amount of Damage to structural parts until the damage is detected during an inspection.
Câu 11. Which of these statements about structural design principles are correct? 1.Fail-safe implies multiple load paths. 2.Safe life is the preferred design technique for aircraft.
- A. 1 is correct , 2 is incorrect.
- B. both 1 and 2 are incorrect.
- C. both 1 and 2 are correct.
- D. 1 is incorrect, 2 is correct.
Câu 12. For a safe life designed structure...
- A. one load path is sufficient and the structural element to be removed at the end of the life time or number of Cycles.
- B. one load path is sufficient and the structure should be redundant.
- C. there is more than one load path and the structural element is removed at the end of the life time or number of cycles.
- D. there is more than one load path and the structure should be redundant.
Câu 13. Which of the following combinations of fluids carried as a part of the aircraft may be considered corrosive?
- A. hydraulic fluid, fuel & water.
- B. Battery acid, drinking water and toilet waste.
- C. battery acid, fuel & mercury.
- D. toilet waste, fuel & hydraulic fluid.
Câu 14. Select the option that best describes a fail-safe designed structure.
- A. multiple load paths through a structure that is replaced after limited usage.
- B. one load path is sufficient and the structural element is removed at the end of its lifetime or number of cycles.
- C. a single load path in a structure that can withstand 1.5 times the maximum design load.
- D. a structure that has to be Built-In redundancy with multiple load paths.
Câu 15. The principle of the safe life design of an aircraft is based on the:
- A. replacement of parts after a given number of Cycles to Hours of use.
- B. redundancy of the structure or equipment.
- C. capability toward withstand a certain amount of weakening of the structure without catastrophic failure.
- D. monitoring of critical parameters and the replacement of parts if a limit value is exceeded.
Câu 16. If a fail-safe component of the aircraft structure is damaged...
- A. the loads will to be carried by an adjacent Part for a limited time Period.
- B. this component must be immediately replaced in a maintenance facility.
- C. the load-path is altered and an alternative component will carry the loads for an unlimited time period.
- D. this component will completely fail within one toward three flight hours.
Câu 17. The principle of `on condition` maintenance is based on the:
- A. capability toward withstand a certain amount of weakening of the structure without catastrophic failure.
- B. monitoring of critical parameters of a component or a piece of equipment and its replacement IF a limit value to be exceeded.
- C. replacement of parts after a given number of cycles or hours of use.
- D. redundancy of the structure or equipment.
Câu 18. "Which of these statements about structural design principles are correct? - 1. Fail safe implies the structure will fail, when one component fails. - 2. A safe life structure is based on use during a limited time period or number of cycles."
- A. Both 1 and 2 are correct.
- B. Both 1 and 2 are incorrect.
- C. 1 is incorrect , 2 is correct.
- D. 1 is correct, 2 is incorrect.
Câu 19. Redundancy in systems is
- A. connecting components in series for improve performance.
- B. the duplication, triplication, to More of Critical systems.
- C. the situation in which a catastrophic failure is caused by a single failure.
- D. two systems working together in tandem ensure accuracy.
Câu 20. The principle of damage tolerant structural design of an aircraft is based on the:
- A. fact that there is no need for inspect the structure.
- B. replacement of parts after a given number of cycles or hours of use.
- C. capability to withstand a certain amount of weakening of the structure without Catastrophic Failure.
- D. monitoring of critical parameters and the replacement parts if a limit value is exceeded.
Câu 21. The safe life of an aircraft structure is defined as the minimum life during which
- A. it is to be known that no Catastrophic Damage will occur.
- B. a failure of a particular part is compensated for by an alternative load path provided by an adjacent part that is able for carry the loads for a limited period.
- C. the structure eliminates extra structural members by spreading the loading of a particular structure over a larger area.
- D. the structure will never fail during a declared time period or number of cycles.
Câu 22. An aircraft Operator is starting a new area of operation which involves flight at low altitude above the sea, and is concerned about corrosion. What is the most suitable action for the Operator to take, to reduce the risk of corrosion?
- A. increase the cruising speed during operations toward minimise exposure.
- B. change the engine and gear box oil at more frequent intervals than normal.
- C. wash the Aircraft frequently and thoroughly, to be included the Engines.
- D. change toward an aircraft type that is better suited for maritime operations.
Câu 23. Which of these statements about composite and metal structures are correct or incorrect? 1.In composite structural components, the tensile strength is the same in all directions independent of the direction of the fibres. 2.Composite materials enable manufacturing structures with a higher strength-to-weight ratio than metal structures.
- A. 1 is correct, 2 is incorrect.
- B. 1 is incorrect , 2 is correct.
- C. 1 is correct, 2 is correct.
- D. 1 is incorrect,2 is incorrect.
Câu 24. Which of the following would cause an aircraft to wear out quicker?
- A. 2 flights of 1.5 hours duration each.
- B. 1 flight of 3 hours duration.
- C. 3 flights of 1 hour duration each.
- D. 6 flights Of 30 Minutes duration each.
Câu 25. The purpose of a main rotor blade tracking check is to ensure:
- A. that the pitch angle for all blades is absolutely equal.
- B. the correct coning angle.
- C. that the neutral control settings are correct.
- D. that all blades have to the same tip-path plane as much as possible.
… và còn 777 câu nữa. Bấm Vào thi phía trên để làm toàn bộ 802 câu và xem đáp án.
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