Fuselage wings and stabilised surface

#1. What is the purpose of the wing main spar?

• ATo withstand bending and torsional loads.
• BTo withstand compressive and torsional loads.
• CTo withstand compressive and shear loads.
• DTo withstand bending and shear loads.

#2. What is the purpose of wing ribs?

• ATo withstand the fatigue stresses.
• BTo shape the wing and support the skin.
• CTo house the fuel and the landing gear.
• DTo provide local support for the skin.

#3. What is the purpose of stringers?

• ATo absorb the torsional and compressive stresses.
• BTo produce stress risers and support the fatigue metres.
• CTo prevent buckling and bending by supporting and stiffening the skin.
• DTo support the primary control surfaces.