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Engineering Materials

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

Gun metal
Aluminium bronze
Babbitt metal
Silicon bronze

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Engineering Materials
The surface hardness of the following order is achieved by nitriding operation

250 VPN
1500 VPN
600 VPN
1000 to 1100 VPN

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Engineering Materials
The blade of a power saw is made of

Boron steel
Malleable cast iron
High speed steel
Stainless steel

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Engineering Materials
The tensile strength of wrought iron is maximum

None of these
Perpendicular to lines of slag distribution
Uniform in all directions
Along the lines of slag distribution

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Engineering Materials
The defect which takes place due to imperfect packing of atoms during crystallization is known as

None of these
Surface defect
Point defect
Line defect

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Engineering Materials
Maximum percentage of carbon in austenite is

0.017
0.008
0.00025
0.0026

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