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Engineering Materials

Engineering Materials
The alloying element which reduces the formation of iron sulphide in steel is

Nickel
Chromium
Vanadium
Manganese

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Engineering Materials
Process of Austempering results in

Formation of bainite structure
Martenistic structure
Carburised structure
Lamellar layers of carbide distributed throughout the structure

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

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

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Engineering Materials
Chromium when added to steel _________ the tensile strength.

Increases
Decreases
None of these
Does not effect

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Engineering Materials
Which of the following alloys does not have copper as one of the constituents?

Constantan
Nichrome
Delta metal
Monel metal

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Engineering Materials
The presence of sulphur in pig iron makes

It hard
The casting unsound
It easily machinable
It brittle

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