The material used in the filament of electric bulbs is_________________?

Related Mcqs:

1. Anodic material used for the cathodic protection of underground buried steel pipeline is_________________?

   A. Nickel or copper
   B. Zinc or magnesium
   C. Bronze
   D. Brass

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

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

3. A suitable material of construction to use with fuming sulphuric acid is_________________?

   A. Carbon steel
   B. Stainless steel type 304
   C. Nickel
   D. Monel

4. The preferred material of construction for storage tanks for 98% sulphuric acid is_________________?

   A. Aluminium
   B. Lead
   C. Stainless steel 316
   D. Mild steel

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

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

6. Failure of a material is termed as fatigue failure, if it fails below the yield point. The resistance to fatigue failure of a material is measured by the__________________?

   A. Ultimate tensile strength (U.T.S.)
   B. Endurance limit
   C. Elastic limit
   D. None of these

7. Nitriding of steel is done (in electric furnace) at _____________ °C?

   A. 510
   B. 1720
   C. 2210
   D. 910

8. Hardest materials so far found is_________________?

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

9. Iron rust is_________________?

   A. Ferrous oxide
   B. Hydrated ferric oxide
   C. Powdered iron
   D. Ferric sulphide

10. Percentage elongation of a material is a measure of its _______________________?

    A. Ductility
    B. Brittleness
    C. Toughness
    D. Malleability