Steel & cast iron pipes are produced by ______________ casting ?

Related Mcqs:

1. _____________________ of grey cast iron produces white cast iron?

   A. Tempering
   B. Rapid heating
   C. Rapid cooling
   D. Slow cooling

2. ______________________ iron is produced by the annealing of white cast iron?

   A. Malleable
   B. Nodular
   C. Ductile
   D. Grey

3. ______________ joint is usually used for joining cast iron pipes mostly used for temporary pipelines, where it may be necessary to dismantle & reassemble the pipeline very frequently ?

   A. Collar
   B. Flanged
   C. Bell and Spigot
   D. Expansion

4. Solidification time of a molten metal in a casting is proportional to (where, V = volume of metal & A = its surface area; in the casting) ?

   A. V/A
   B. V/A2
   C. V2/A
   D. V2/A2

5. Annealing of white cast iron produces _____________________ iron?

   A. Grey
   B. Nodular
   C. Malleable
   D. Spheroidal

6. Steel produced from phosphatic iron is _______________ in nature?

   A. Malleable
   B. Ductile
   C. Brittle
   D. Tough

7. Carbon is present in the form of _______________________ in grey cast iron ?

   A. Spheroids
   B. Nodular aggregates of graphite
   C. Flakes
   D. Cementite

8. Cast iron contains ____________________ percent carbon?

   A. 2.5
   B. 3.75
   C. 4.75
   D. 5.25

9. Silicon percentage in acid resistant cast iron is about ___________________?

   A. 4
   B. 8
   C. 14
   D. 20

10. Iron content in Indian iron ore is about _________________ percent?

    A. 80-85
    B. 60-65
    C. 40-45
    D. 20-25