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Engineering Materials

Engineering Materials
Phosphor bronze contains

0.5% of phosphorous
2.5% phosphorous
1% phosphorous
None of these

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Engineering Materials
A material is known as allotropic or polymorphic if it

Responds to heat treatment
Has a fixed structure under all conditions
Exists in several crystal forms at different temperatures
Has its atoms distributed in a random pattern

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Engineering Materials
Pig iron is the name given to

Raw material for blast furnace
Iron in molten form in the ladles
Product of blast furnace made by reduction of iron ore
Iron containing huge quantities of carbon

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Engineering Materials
Delta iron occurs at temperature of

Above melting point
Between 1400°C and 1539°C
Between 910°C and 1400°C
Room temperature

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Engineering Materials
Solder is an alloy consisting of

Tin and copper
Tin and lead
Lead and zinc
Tin, antimony, copper

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Engineering Materials
The machinability of steel is increased by

Silicon and sulphur
Phosphorous, lead and sulphur
Sulphur, graphite and aluminium
Phosphorous and aluminium

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