Softness of silver can be converted into hardness by alloying it with small quantity 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. Percentage of silver in German silver is__________________?

   A. 5
   B. 10
   C. 20
   D. 0

3. __________________ does not contain copper as an alloying element?

   A. Nichrome
   B. Manganin
   C. Perminvar
   D. Monel metal

4. _______________ does not contain tin as an alloying material?

   A. Brass
   B. Pewter
   C. Solder
   D. Babbitt metal

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

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

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

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

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

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

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

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

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

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

10. 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