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Engineering Materials

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

Around 0°C
Below 10°K
Above 100°K
Around 100°C

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Engineering Materials
Which of the following when used in ordinary low carbon steels, makes the metal ductile and of good bending qualities?

Manganese
Phosphorus
Sulphur
Silicon

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Engineering Materials
Maximum percentage of carbon in austenite is

0.0026
0.017
0.00025
0.008

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Engineering Materials
Iron ore is usually found in the form of

All of these
Carbonates
Oxides
Sulphides

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

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

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Engineering Materials
The transistor is made of

Silver
Gold
Germanium
Copper

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