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Engineering Materials

Engineering Materials
Cemented carbide tools are not found to be suitable for cutting

Cast iron
Brass
Aluminium
Steel

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Engineering Materials
Monel metal contains

Malleable iron and zinc
88% copper and 10% tin and rest zinc
63 to 67% nickel and 30% copper
Alloy of tin, lead and cadmium

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Engineering Materials
For the allotropic forms of iron, the points of arrest are

The points where no further change occurs
Constant for all metals
The points of discontinuity
The points where there is no further flow of metal

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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 its atoms distributed in a random pattern
Responds to heat treatment
Has a fixed structure under all conditions

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Engineering Materials
In mottled cast iron, carbon is available in

Nodular form
Combined form
Partly in free and partly in combined state
Free form

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Engineering Materials
White cast iron has

All of these
Low tensile strength
High compressive strength
Carbon in the form of carbide

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MORE MCQ ON Engineering Materials

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