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Engineering Materials

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

None of these
Remain same
Increases
Decreases

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Engineering Materials
Monel metal contains

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

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Engineering Materials
Alnico, an alloy used extensively for permanent magnets contains iron, nickel, aluminium and cobalt in the following ratio

30 : 20 : 30 : 20
40 : 30 : 20 : 10
50 : 20 : 20 : 10
50 : 20 : 10 : 20

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Engineering Materials
Which of the following has a fine gold colour and is used for imitation jewellery?

Babbitt metal
Gun metal
Aluminium bronze
Silicon bronze

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Engineering Materials
Maximum percentage of carbon in austenite is

0.0026
0.00025
0.008
0.017

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Engineering Materials
The material widely used for making pendulums of clocks is

Heat resisting steel
Stainless steel
High speed steel
Nickel steel

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