Eom 3 paper 3

11,The carbon content in the steel is?,

1.3 to 4 %,

2.0.15 %,

3.1.8 to 5 %,

4.less than 1.8 %,

12,In steel as well as in wrought iron the percentage of sulphur should not exceed ?,

1.0.06,

2.0.1,

3.0.5,

4.0.8,

13,In wrought iron the % of phosphourus should not exceed ?,

1.0.06,

2.0.2,

3.0.5,

4.1.0,

14,The process of heating the metal to normalising temparature and then allowing it to cool slowly and 

uniformly not in air is called?,

1.Forging,

2.Normalising,

3.Annealing,

4.Hardening,

15,The objective of annealing is?,

1.To remove internal strains,

2.To reduce the size of crystal grains,

3.To improve the strength,

4.None,

Ans

11. 4

12. 1

13. 2

14. 3

15. 1