Hardest material so far found is__________________?

Related Mcqs:

1. Hardest materials so far found is_________________?

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

2. Which of the following is the hardest material ?

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

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

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

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

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

5. Which of the following is the hardest _______________?

   A. Cementite
   B. Pearlite
   C. Austenite
   D. Ferrite

6. The material of construction of bearings is__________________?

   A. Cast iron
   B. Babbitt metal
   C. Pig iron
   D. Steel

7. For handling sulphuric acid of 95% strength, the suitable material of construction for pipes is__________________?

   A. Stainless steel
   B. Cast iron
   C. Aluminium
   D. Nickel

8. Most suitable material for high pressure vessel operating at 500 atm. and 500° C is__________________?

   A. Molybdenum stainless steel
   B. 18/8 stainless steel
   C. Mild steel
   D. High silicon iron (14% Si)

9. The material of construction of pressure mills used for squeezing out the juice from sugar cane is__________________?

   A. Stainless steel
   B. Cast iron
   C. Mild steel
   D. Monel

10. Most suitable material of construction for the storage of concentrated nitric acid is__________________?

    A. Cast iron
    B. Monel
    C. Karbate
    D. Aluminium or chromium alloys (Cr > 18% for cold acid)