The range of Mho’s scale of hardness is from________________?

Related Mcqs:

1. The hardest material just prior to diamond in Mhos scale is_________________?

   A. Topaz B. Carborundum C. Corundum D. Calcite...

2. The softest material just next to talc in the Mhos scale is_________________?

   A. Quartz B. Gypsum C. Feldspar D. Fluorite...

3. A hardness depth of about 3 mm can be achieved by induction hardness in ______________ seconds?

   A. 5 B. 100 C. 250 D. 500...

4. The softest material in Mho’s scale (for measuring hardness) is________________?

   A. Talc B. Gypsum C. Rubber D. None of these...

5. Brinell Hardness Number (BHN) for talc is approximately in the range of____________________?

   A. 1-5 B. 20-30 C. 100 -150 D. 200 – 250...

6. High speed steel tools retain their hardness upto a temperature of _____________ °C?

   A. 500 B. 750 C. 900 D. 1100...

7. Silicon percentage in iron castings to have maximum hardness should be about__________________?

   A. 0.3 B. 0.5 C. 0.8 D. 2.5...

8. Addition of ______________ in steel is helpful in increasing the depth of hardness?

   A. Chromium B. Sulphur C. Vanadium D. Tungsten...

9. Softness of silver can be converted into hardness by alloying it with small quantity of_________________?

   A. Copper & nickel B. Zinc C. Aluminium D. Tin...

10. Addition of _____________ in steel can help in increasing the depth of hardness?

    A. Nickel B. Chromium C. Vanadium D. Tungsten...