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

Related Mcqs:

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

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

2. The softest material just next to talc in the Mho’s scale is___________________?

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

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

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

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

   A. 1 to 15
   B. 1 to 8
   C. 1 to10
   D. 0 to 10

5. The increase in hardness of metal due to its cold working is termed as the _______________ hardening?

   A. Work
   B. Age
   C. Induction
   D. Flame

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

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

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