Question

What are the trade names of two most common aramid materials?

• A. Silicon carbide, silicon nitride
• B. E-glass, aluminium oxide
• C. Kevlar, Nomex
• D. Zircon, carborundum

Hint:

Kevlar is known for its high tensile strength-to-weight ratio (used in body armor), while Nomex provides thermal and fire resistance (used in firefighter suits).

Answer 1

The Correct Option is C

Aramid materials are high-performance synthetic fibers that are known for their excellent strength-to-weight ratio, high resistance to abrasion, and thermal stability. They are widely used in various applications such as aerospace, military, and industrial sectors. Step 1: Identifying Aramid Materials - Aramids (Aromatic Polyamides): These fibers are known for their high strength, thermal stability, and resistance to abrasion. - Kevlar and Nomex are the two most widely used trade names for aramid fibers. Kevlar is widely used in making bulletproof vests, while Nomex is primarily used for fire-resistant clothing.


Step 2: Why the Other Options are Incorrect - Option (A) - Incorrect: Silicon carbide and silicon nitride are ceramic materials, not aramid fibers. - Option (B) - Incorrect: E-glass and aluminium oxide are used in fiber-reinforced composites but are not aramid materials. - Option (C) - Correct: Kevlar is used in bulletproof vests, and Nomex is used in fire-resistant clothing.
- Option (D) - Incorrect: Zircon and carborundum (silicon carbide) are ceramics, not aramid materials.


Step 3: Conclusion Since Kevlar and Nomex are the most common trade names for aramid materials, the correct answer is option (C).