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Engineering Materials

Engineering Materials
Preheating is essential in welding

All of these
High speed steel
All nonferrous materials
Cast iron

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Engineering Materials
The percentage of carbon in low carbon steel is

0.05%
0.5%
0.15%
0.3%

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Engineering Materials
Surveying tapes are made of a material having low coefficient of expansion and enough strength. The alloy used is

Silver metal
Hastelloy
Invar
Duralumin

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Engineering Materials
Which of the following metal is used for nuclear energy?

All of these
Thorium
Uranium
Niobium

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Engineering Materials
Which of the following display properties similar to that of steel?

Whiteheart cast iron
None of these
Blackheart cast iron
Both (A) and (B)

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

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

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