Mechanical Engineering Test Preparations On Engineering Materials Part 2

Test Preparation on Mechanical Engineering Test Preparations On Engineering Materials Part 2

1.

Nodular cast iron is produced by adding __________ to the molten cast iron.

1nickel
2chromium
3copper
4magnesium

2.

Free carbon in iron makes the metal

1soft and gives a coarse grained crystalline structure
2soft and gives a fine grained crystalline structure
3hard and gives a coarse grained crystalline structure
4hard and gives a fine grained crystalline structure

3.

In the middle part of the blast furnace (zone of absorption), the temperature is

1400Adeg to 700AdegC
2800AdegC to 1000AdegC
31200AdegC to 1300AdegC
41500AdegC to 1700AdegC

4.

The temperature point at which the change starts on heating the steel is called

1lower critical point
2upper critical point
3point of recalescence
4point of decalescence

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