Aluminium and Aircraft Materials Quiz

Which of the following is the main reason aluminium is used in aircraft?

• It is easy to melt

• It has a high strength-to-weight ratio

• It is magnetic

• It absorbs radar waves

What is a major drawback of aluminium-silicon (Al-Si) alloys?

• They are too expensive

• They corrode quickly

• They are too soft

• They can become brittle due to the silicon phase

Which material is mainly used in stealth fighter jets because it absorbs radar waves?

• Aluminium alloy

• Steel

• Composite materials

• Copper

Which aluminium alloy is known for high strength and is heat-treatable?

• Al-Si

• Al-Mg-Si

• Al-Cu

• Pure aluminium

Why is the black box made from titanium or stainless steel instead of aluminium?

• To reduce weight

• To lower cost

• To improve radio signal

• To survive fire, impact, and water damage