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Which of the following tests are microhardness tests? P. Brinell Hardness Q. Rockwell Hardness R. Knoop Hardness S. Vickers Hardness
Brinell Hardness Number (BHN) for talc is approximately in the range of
Brinell hardness measurement made with a 10 mm diameter steel ball at a load of 1000 kg gives an indentation of diameter 4 mm in a material. The BHN of this material is approximately
The Brinell hardness measurement of a material is made by applying a 500 kg load with a 10 mm ball indentor. If the indentation diameter is 6 mm, the Brinell hardness (kg/mm2) will be
Which of the following statements are true about soft power?
1. Soft power can be used by state actors.
2. Soft power can be used by non-state actors.
3. Soft power is the second face of power.
4. Soft power is a form of idealism.
Select the correct answer:
Which of the following statements are correct? 1. Steel and cast iron are multi-phase alloys. 2. Ferrite is a single phase interstitial solid solution of carbon in iron. 3. Wrought iron is a highly refined iron with a small amount of slag which gives resistance to progressive corrosion. 4. Stellite contains large amounts of metals like cobalt and tungsten resulting in high hardness. Select the correct answer using the code given below.
Up to a Vickers hardness of _________ the VHN agrees with the BHN.
For hardness test of copper in Brinell hardness tester, the diameter of ball is ___________
The Meyer’s hardness is more sensitive to applied load than the Brinell hardness test.
Suppose Brinell hardness measurement is made from a nonstandard ball of diameter 5 mm. If the load applied in 10 mm standard ball is 3000 kg, then what load should be applied on the 5 mm ball to get the consistent reading in hardness measurement?