Question

The surface plate is usually made of grey cast iron because it provides:

• A. Hard plate
• B. Wear-resistant plate
• C. Easy to manufacture
• D. Lubricates due to graphite flakes

Hint:

Grey cast iron is commonly used for surface plates because of its wear resistance and ability to maintain dimensional accuracy over time. The graphite flakes also help reduce friction.

Answer 1

The Correct Option is D

Step 1: Properties of grey cast iron.
Grey cast iron is known for its excellent wear resistance, which makes it ideal for surface plates used in measuring and inspection. The graphite flakes present in the cast iron improve its ability to resist wear and provide thermal stability.
Step 2: Why grey cast iron is used.
Surface plates are used to ensure precision in measurements, and grey cast iron provides a durable and wear-resistant material for these applications. The material's properties ensure that it can withstand repeated use without significant deformation. Additionally, the graphite flakes present in grey cast iron offer self-lubrication, reducing friction and wear.