Ferromagnetic alpha iron exists in temperature range of

Engineering Materials
Ferromagnetic alpha iron exists in temperature range of

910 to 1440°C

Below 723°C

770 to 910°C

1400 to 1539°C

910 to 1440°C

Below 723°C

770 to 910°C

1400 to 1539°C

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Engineering Materials
The brown smoke during the operation of a Bessemer converter indicates that the

Air is burning out silicon and manganese

The brown smoke does not occur during the operation of a Bessemer converter

Silicon and manganese has burnt and carbon has started oxidizing

The converter must be titled to remove the contents of the converter

Air is burning out silicon and manganese

The brown smoke does not occur during the operation of a Bessemer converter

Silicon and manganese has burnt and carbon has started oxidizing

The converter must be titled to remove the contents of the converter

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Engineering Materials
Which of the following constituents of steels is softest and least strong?

Pearlite

Cementite

Ferrite

Austenite

Pearlite

Cementite

Ferrite

Austenite

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Engineering Materials
Malleable cast iron

Is produced by small additions of magnesium (or cerium) in the ladle. Graphite is in the nodular or spheroidal form and is well dispersed throughout the material

Contains 1.7 to 3.5% carbon in Free State and is obtained by the slow cooling of molten cast iron

Is produced by annealing process. It is soft, tough, and easily machined metal

Is also known as chilled cast iron and is obtained by cooling rapidly. It is almost unmachinable

Is produced by small additions of magnesium (or cerium) in the ladle. Graphite is in the nodular or spheroidal form and is well dispersed throughout the material

Contains 1.7 to 3.5% carbon in Free State and is obtained by the slow cooling of molten cast iron

Is produced by annealing process. It is soft, tough, and easily machined metal

Is also known as chilled cast iron and is obtained by cooling rapidly. It is almost unmachinable

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Engineering Materials
Alnico, an alloy used extensively for permanent magnets contains iron, nickel, aluminium and cobalt in the following ratio

30 : 20 : 30 : 20

40 : 30 : 20 : 10

50 : 20 : 10 : 20

50 : 20 : 20 : 10

30 : 20 : 30 : 20

40 : 30 : 20 : 10

50 : 20 : 10 : 20

50 : 20 : 20 : 10

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Engineering Materials
1841 high speed steel contains

Vanadium 4%, chromium 18% and tungsten 1%

None of these

Vanadium 1%, chromium 4% and tungsten 18%

Vanadium 18%, chromium 1% and tungsten 4%

Vanadium 4%, chromium 18% and tungsten 1%

None of these

Vanadium 1%, chromium 4% and tungsten 18%

Vanadium 18%, chromium 1% and tungsten 4%

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Engineering Materials

Engineering Materials Ferromagnetic alpha iron exists in temperature range of

Engineering Materials The brown smoke during the operation of a Bessemer converter indicates that the

Engineering Materials Which of the following constituents of steels is softest and least strong?

Engineering Materials Malleable cast iron

Engineering Materials Alnico, an alloy used extensively for permanent magnets contains iron, nickel, aluminium and cobalt in the following ratio

Engineering Materials 1841 high speed steel contains

Engineering Materials
Ferromagnetic alpha iron exists in temperature range of

Engineering Materials
The brown smoke during the operation of a Bessemer converter indicates that the

Engineering Materials
Which of the following constituents of steels is softest and least strong?

Engineering Materials
Malleable cast iron

Engineering Materials
Alnico, an alloy used extensively for permanent magnets contains iron, nickel, aluminium and cobalt in the following ratio

Engineering Materials
1841 high speed steel contains