Which is false statement about case hardening? Case hardening is done by

Engineering Materials
Which is false statement about case hardening? Case hardening is done by

Induction hardening

Nitriding

Electroplating

Cyaniding

Induction hardening

Nitriding

Electroplating

Cyaniding

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Engineering Materials
Delta iron occurs at temperature of

Between 1400°C and 1539°C

Room temperature

Between 910°C and 1400°C

Above melting point

Between 1400°C and 1539°C

Room temperature

Between 910°C and 1400°C

Above melting point

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Engineering Materials
White cast iron

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

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

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

Is produced by small additions of magnesium (or creium) in the ladle. Graphite is in 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 also known as chilled cast iron and is obtained by cooling rapidly. It is almost unmachinable

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

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

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Engineering Materials
For the allotropic forms of iron, the points of arrest are

The points of discontinuity

Constant for all metals

The points where no further change occurs

The points where there is no further flow of metal

The points of discontinuity

Constant for all metals

The points where no further change occurs

The points where there is no further flow of metal

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Engineering Materials
Admiralty gun metal contains

Iron scrap and zinc

63 to 67% nickel and 30% copper

88% copper, 10% tin and rest zinc

Alloy of tin, lead and cadmium

Iron scrap and zinc

63 to 67% nickel and 30% copper

88% copper, 10% tin and rest zinc

Alloy of tin, lead and cadmium

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Engineering Materials
Bell metal contains

90% copper and 10% tin

70% copper and 30% zinc

85 - 92% copper and rest tin with little lead and nickel

70 - 75% copper and rest tin

90% copper and 10% tin

70% copper and 30% zinc

85 - 92% copper and rest tin with little lead and nickel

70 - 75% copper and rest tin

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Engineering Materials

Engineering Materials Which is false statement about case hardening? Case hardening is done by

Engineering Materials Delta iron occurs at temperature of

Engineering Materials White cast iron

Engineering Materials For the allotropic forms of iron, the points of arrest are

Engineering Materials Admiralty gun metal contains

Engineering Materials Bell metal contains

Engineering Materials
Which is false statement about case hardening? Case hardening is done by

Engineering Materials
Delta iron occurs at temperature of

Engineering Materials
White cast iron

Engineering Materials
For the allotropic forms of iron, the points of arrest are

Engineering Materials
Admiralty gun metal contains

Engineering Materials
Bell metal contains