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Engineering Materials

Engineering Materials
Bronze is an alloy of

Copper and zinc
Copper and tin
Copper, tin and zinc
None of these

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Engineering Materials
The toughness of a material __________ when it is heated.

Remain same
None of these
Increases
Decreases

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Engineering Materials
The purpose of heat treatment is to

Change grain size
Relieve the stresses set up in the material after hot or cold working
Modify the structure of the material
Any one of these

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Engineering Materials
Admiralty brass used for steam condenser tubes contains copper and zinc in the following ratio

2.9375
2.1180555555556
40 : 60
30 : 70

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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?

Sulphur
Silicon
Manganese
Phosphorus

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Engineering Materials
Eutectoid steel contains following percentage of carbon

0.008
0.0063
0.003
0.0002

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