Which of the following element results in presence of free graphite in C.I.?

Engineering Materials
Which of the following element results in presence of free graphite in C.I.?

Carbon

Silicon

Manganese

Sulphur

Carbon

Silicon

Manganese

Sulphur

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Engineering Materials
Which of the following statements are true for annealing of steels?

Steels are heated to 500 to 700°C

Internal stresses are relieved

Cooling is done slowly and steadily

All of these

Steels are heated to 500 to 700°C

Internal stresses are relieved

Cooling is done slowly and steadily

All of these

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Engineering Materials
Super conduction by metals is observed in the temperature range of

Around 100°C

Below 10°K

Around 0°C

Above 100°K

Around 100°C

Below 10°K

Around 0°C

Above 100°K

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Engineering Materials
The temperature at which ferromagnetic alpha iron transforms to paramagnetic alpha iron is

1050°C

Below recrystallization temperature

770°C

910°C

1050°C

Below recrystallization temperature

770°C

910°C

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Engineering Materials
Grey cast iron

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

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

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

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

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

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

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

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

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Engineering Materials
Stress relaxation is the phenomenon

In which parts are not loaded

In which deformation tends to loosen the joint and produces a stress reduced

Stress reduces on increasing load

In which stress remains constant on increasing load

In which parts are not loaded

In which deformation tends to loosen the joint and produces a stress reduced

Stress reduces on increasing load

In which stress remains constant on increasing load

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Engineering Materials

Engineering Materials Which of the following element results in presence of free graphite in C.I.?

Engineering Materials Which of the following statements are true for annealing of steels?

Engineering Materials Super conduction by metals is observed in the temperature range of

Engineering Materials The temperature at which ferromagnetic alpha iron transforms to paramagnetic alpha iron is

Engineering Materials Grey cast iron

Engineering Materials Stress relaxation is the phenomenon

Engineering Materials
Which of the following element results in presence of free graphite in C.I.?

Engineering Materials
Which of the following statements are true for annealing of steels?

Engineering Materials
Super conduction by metals is observed in the temperature range of

Engineering Materials
The temperature at which ferromagnetic alpha iron transforms to paramagnetic alpha iron is

Engineering Materials
Grey cast iron

Engineering Materials
Stress relaxation is the phenomenon