Q1: Which of the following has the highest modulus of elasticity (about 7 x 10⁶ kg/cm²) ?

ANS:C - Tungsten carbide

Tungsten carbide is a compound consisting of tungsten (W) and carbon (C) atoms. It is an exceptionally hard and wear-resistant material, often used in industrial applications where high hardness and durability are required. Tungsten carbide is known for its superior properties, including:

1. Hardness: Tungsten carbide is one of the hardest materials known, surpassed only by diamond. This makes it highly resistant to wear, abrasion, and deformation, even in harsh operating conditions.
2. Strength: Despite its extreme hardness, tungsten carbide also possesses high strength, allowing it to withstand heavy loads and impacts without breaking or deforming.
3. Heat resistance: Tungsten carbide maintains its hardness and strength at high temperatures, making it suitable for applications involving high-speed machining, cutting, and drilling where temperatures can rise significantly.
4. Chemical resistance: Tungsten carbide exhibits excellent resistance to corrosion and chemical attack, making it suitable for use in aggressive environments where other materials may degrade.
5. Versatility: Tungsten carbide can be formed into various shapes and sizes, including inserts, cutting tools, dies, and wear parts, making it highly versatile for a wide range of industrial applications.