Mechanical Engineering : Engineering Materials QUESTIONS AND ANSWERS :: part2 : 21 to 25
Following Mechanical Engineering Multiple choice objective type questions and answers will help you in BSNL JTO, GATE 2024 and IES 2024 examinations :
21.Sulfur in pig iron tends to make it |
| hard' |
| soft |
| ductile |
| tough |
| malleable. |
22.Iron is |
| paramagnetic |
| ferromagnetic |
| ferroelectric |
| dielectric |
| none of the above. |
23.In grey cast iron, carbon is present in the form of |
| cementite |
| free carbon |
| flakes |
| spheroids |
| nodular aggregates of graphite. |
24.Pick up wrong statement about wrought iron |
| It contains carbon of the order of 0 to 0.25% |
| It melts at 1535�C |
| It is very soft and ductile |
| It can be easily forge welded |
| It is made by adding suitable percent�age of carbon to molten iron and subjecting the product to repeated hammering and rolling. |
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