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Engineering Materials

Engineering Materials
Lead is poured into the joint between two pipes. These pipes may be made of

Asbestos cement
Vitrified clay
Cast iron
Concrete

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Engineering Materials
Hardness of upper bainite (acicular structure) is about

RC 65
RC 80
RC 57
RC 48

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Engineering Materials
Dye penetrant method is generally used to locate

Core defects
Temporary defects
Surface defects
Superficial defects

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Engineering Materials
When low carbon steel is heated up to lower critical temperature

There is no change in grain size
The grain size first increases and then decreases very rapidly
The grain size increases very rapidly
The average grain size is a minimum

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Engineering Materials
Process of Austempering results in

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

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Engineering Materials
The molecules in a solid move

In a random manner
In a haphazard way
In circular motion
Back and forth like tiny pendulums

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