Question

Match List I with List II

LIST I (Hardness Test)	LIST II (Type of indenter used)
A. Rockwell hardness test	I. Square-based diamond-pyramid
B. Vickers hardness test	II. Hard steel ball
C. Brinell hardness test	III. Rhombic-based diamond-pyramid
D. Knoop hardness test	IV. Diamond cone

• A. A - I B - II C - III D - IV
• B. A - II B - III C - I D - IV
• C. A - I B - II C - IV D - III
• D. A - III B - I C - II D - IV

Hint:

Different hardness tests use various indenters like diamonds steel balls or cones each suitable for specific materials and testing conditions

Answer 1

The Correct Option is A

- The Rockwell hardness test uses a diamond cone indenter (Option IV).
- The Vickers hardness test uses a square-based diamond-pyramid indenter (Option I).
- The Brinell hardness test uses a hard steel ball indenter (Option II).
- The Knoop hardness test uses a rhombic-based diamond-pyramid indenter (Option III).