1. A Brinell hardness test produced an indentation of 4mm using a 10-mm ball indenter and a load of 3000 kg. Calculate the BHN for the material. 2. If a 500-kg load produced an indentation of 2.5 mm using a 10-mm ball indenter, what is the BHN for the material? 3. What is the Vickers hardness number (DPH), for a material where a diagonal length of 0.22 mm was produced using a 10-kg load? 4. If a 10-kg load produced an indentation with a 0.33-mm diagonal, what is the DPH for the material? 5. What is the Knoop hardness number for a material that exhibited an indentation with a length of 0.050 mm after being subjected to a 500-g load? 6. If a 10kg load produced an indentation with a length of 0.075 mm, what is the Knoop hardness number for the material? 7. Convert an HRC value of 30 to a BHN. 8. Convert an HRB value of 50 to a BHN. 9. What Rockwell scale would be used with a 1/16 in. indenter and a 100-kg load? 10. What Rockwell scale would be used with a brale indenter and a 150 kg load?