Question

Match the hardness test (in Column I) with its indenter type (in Column II):

• A. P-2, Q-4, R-1
• B. P-4, Q-2, R-3
• C. P-3, Q-2, R-1
• D. P-4, Q-2, R-1

Hint:

- Brinell → Tungsten carbide sphere.
- Rockwell → Diamond cone (or steel ball for softer scales).
- Vickers → Diamond pyramid.

Answer 1

The Correct Option is C

Step 1: Brinell Hardness Test.
Uses a **tungsten carbide sphere** as the indenter. \[ P = 3 \]
Step 2: Rockwell Hardness Test.
Primarily uses a **diamond cone (Brale indenter)** for metals. \[ Q = 2 \]
Step 3: Vickers Hardness Test.
Uses a **diamond pyramidal indenter**. \[ R = 1 \]
Step 4: Final matching.
\[ P-3,\; Q-2,\; R-1 \] Final Answer: \[ \boxed{\text{(C) P-3, Q-2, R-1}} \]