ENGINEERING MATERIALS QUIZ

Maximum percentage of carbon in austenite is

0.00025

0.0026

0.008

0.017

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Delta-iron occurs between the temperature ranges of

1400°C to 1530°C

400°C to 600°C

900°C to 1400°C

600°C to 900°C

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The alloy used for making electrical resistances and heating elements is

Invar

Nichrome

Elinvar

Magnin

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The charge of the blast furnace consists of

Calcined ore, coke and limestone all in equal parts

Calcined ore (1 part), coke (8 parts) and limestone (4 parts)

Calcined ore (8 parts), coke (4 parts) and limestone (1 part)

Calcined ore (4 parts), coke (1 part) and limestone (8 parts)

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Blast furnace is used to produce

Pig iron

Cast iron

Steel

Wrought iron

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Chilled cast iron has

Graphite as its basic constituent of composition

A low percentage of graphite

No graphite

A very high percentage of graphite

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Blast furnace produces following by reduction of iron ore

Malleable iron

Cast iron

Pig iron

Wrought iron

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The electric process of steel making is especially adapted to

High speed tool steel

Alloy and carbon tool steel

Magnet steel

All of these

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In low carbon steels, ________ raises the yield point and improves the resistance to atmospheric corrosion.

Sulphur

Silicon

Phosphorus

Manganese

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Weld decay is the phenomenon found with

Nonferrous materials

Mild steel

Stainless steel

Cast iron

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