Which of the following is the hardest _______________?

Related Mcqs:

1. Which of the following is the hardest material ?

   A. Topaz
   B. Quartz
   C. Corundum
   D. Fluorite

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

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

3. Hardest materials so far found is_________________?

   A. Diamond
   B. Graphite
   C. Carborundum
   D. Pumice stone

4. Hardest material so far found is__________________?

   A. Diamond
   B. Graphite
   C. Carborundum
   D. Pumice stone

5. The hardest material just prior to diamond in Mho’s scale is___________________?

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

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

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

7. Reduction in the grain size reduces the _______________ of the material?

   A. Fatigue resistance
   B. Tensile strength
   C. Creep resistance
   D. All A., B. & C.

8. _______________ is a donor impurity for semi-conductors ?

   A. Boron
   B. Antimony
   C. Gallium
   D. None of these

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

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

10. In the Kraft process of sulphate paper pulp manufacture, the black liquor and the white liquor storage tank is made of _______________?

    A. Concrete
    B. Wood
    C. Steel
    D. Porcelain