1.

If the load being applied is 2000kg, and the area of impression is 250 Square millimetres, what is the Brinell number of the test material?(a) 80 kg per square millimeter(b) 25 kg per square millimeter(c) 20 kg per square millimeter(d) 8 kg per square millimeterI have been asked this question by my college professor while I was bunking the class.My doubt is from Aircraft Materials in chapter Testing Aircraft Materials of Aerospace Materials & Processes

Answer»

Correct choice is (d) 8 KG per SQUARE millimeter

To elaborate: Brinell hardness number = \(\frac{Load \,APPLIED}{AREA \,of \,impression \,(spherical)}\)

= \(\frac{2000}{250}\)

= 8 kg per square millimeter.



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