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WorksheetsLevel 2 Materials Quiz
Total questions: 15
Worksheet time: 5mins
1. What is the primary reason aluminum is used extensively in aircraft structures?
A. It is inexpensive
B. It has a high strength-to-weight ratio
C. It resists corrosion better than all other metals
D. It is easier to weld than steel
2. Which of the following is a non-ferrous metal used in aircraft structures?
A. Mild steel
B. Stainless steel
C. Aluminum alloy
D. Wrought iron
3. The main purpose of anodizing aluminum is to:
A. Improve its electrical conductivity
B. Increase its corrosion resistance
C. Reduce its weight
D. Make it easier to machine
4. What is the main disadvantage of using magnesium alloys in aircraft structures?
A. They are highly flammable when ignited
B. They are too heavy
C. They cannot be machined
D. They have low strength
5. The part of the fuselage structure that gives it shape and maintains rigidity is the:
A. Stringer
B. Frame
C. Longerons
D. Skin
6. What type of stress is experienced by the lower flange of a wing spar in flight?
A. Tensile stress
B. Compressive stress
C. Shear stress
D. Torsional stress
7. Which of the following composite reinforcements provides the highest stiffness?
A. Kevlar
B. Glass fibre
C. Carbon fibre
D. Polyester
8. The main function of stringers in an aircraft fuselage is to
A. Form the outer skin
B. Provide longitudinal strength and support the skin
C. Support the ribs
D. Connect the landing gear
9. What is the purpose of anodizing aluminium alloy components?
A. To increase strength
B. To improve corrosion resistance and paint adhesion
C. To reduce weight
D. To increase flexibility
10. Which type of structure uses a skin that carries most of the load?
A. Truss type
B. Semi-monocoque
C. Monocoque
D. Box beam
11. In a semi-monocoque fuselage, which components prevent buckling of the skin?
A. Spars
B. Frames and stringers
C. Bulkheads
D. Longerons only
12. The honeycomb core in composite panels is used mainly to
A. Reduce cost
B. Increase flexibility
C. Increase stiffness with minimal weight
D. Provide electrical insulation
13. Which inspection method is most suitable for detecting surface cracks in aluminium?
A. Radiography
B. Dye penetrant inspection
C. Eddy current inspection
D. Ultrasonic testing
14. The primary alloying element in 2024 aluminium alloy is
A. Magnesium
B. Copper
C. Zinc
D. Manganese
15. What is the main purpose of a spar in a wing structure?
A. Form the aerodynamic shape
B. Carry bending loads from lift and weight
C. Provide attachment for control surfaces
D. Reduce drag
