AME 1 Q3

Answer:

B. Surgical instruments

Explanation:

Martensitic stainless steel is known for its high hardness and strength, making it an excellent choice for surgical instruments. It can be easily sharpened and maintains a sharp edge, crucial for precision in medical procedures.

Why the other options are incorrect:

• A. Kitchen sinks: While stainless steel is commonly used for kitchen sinks, martensitic stainless steel is not the ideal choice for this application. It's more susceptible to corrosion and staining compared to other types of stainless steel, such as austenitic.
• C. Construction beams: Martensitic stainless steel, while strong, is generally not used for construction beams due to its lower ductility compared to other types of steel. This makes it more prone to brittle fracture under stress.
• D. Electrical wiring: Martensitic stainless steel is not a good conductor of electricity and is therefore not suitable for electrical wiring. Copper is the primary material used for this purpose.

Answer:

B. Kitchen sinks

Explanation:

Ferritic stainless steel is often used for kitchen sinks due to its good corrosion resistance and easy cleaning. It's a popular choice for this application because it can withstand exposure to water, detergents, and food acids.

Why the other options are incorrect:

• A. Aircraft wings: Ferritic stainless steel is not typically used for aircraft wings due to its weight and potential limitations in terms of strength and fatigue resistance under the extreme conditions of flight.
• C. Ship propellers: While stainless steel is used in marine applications, ferritic stainless steel is generally not the preferred choice for propellers due to its lower strength compared to other types of stainless steel or other materials like bronze.
• D. Medical implants: Ferritic stainless steel is not commonly used for medical implants due to concerns about corrosion resistance and potential biocompatibility issues. Other types of stainless steel or titanium alloys are typically preferred for these applications.

Answer:

B. Kitchen cutlery

Explanation:

Austenitic stainless steel is commonly used for kitchen cutlery due to its excellent corrosion resistance, durability, and ease of cleaning. It's also non-reactive, meaning it won't alter the taste of food.