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Engineering Materials

Engineering Materials
Induction hardening is basically a

Carburising process
None of these
Core hardening process
Surface hardening process

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Engineering Materials
When low carbon steel is heated up to lower critical temperature

The grain size increases very rapidly
There is no change in grain size
The grain size first increases and then decreases very rapidly
The average grain size is a minimum

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Engineering Materials
Phosphor bronze contains

1% phosphorous
0.5% of phosphorous
2.5% phosphorous
None of these

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Engineering Materials
Which is false statement about properties of aluminium?

Modulus of elasticity is fairly low
Creep strength limits its use to fairly low temperatures
Fatigue strength is not high
Wear resistance is very good

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

2.1180555555556
40 : 60
2.9375
30 : 70

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Engineering Materials
The stiffness is the ability of a material to resist

Externally applied forces with breakdown or yielding
Fracture due to high impact loads
Deformation under stress
None of these

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