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Engineering Materials

Engineering Materials
Hardness of lower bainite (tempered martensite) is about

RC 48
RC 65
RC 57
RC 80

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Engineering Materials
The metal suitable for bearings subjected to light loads, is

Phosphor bronze
Monel metal
Silicon bronze
White metal

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Engineering Materials
Which is false statement about annealing? Annealing is done to

Relieve stresses
Soften material
Harden steel slightly
Improve machining characteristic

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Engineering Materials
Heavy duty leaf and coil springs contain carbon of the following order

0.005
0.01
0.008
0.002

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Engineering Materials
Super conduction by metals is observed in the temperature range of

Above 100°K
Around 100°C
Around 0°C
Below 10°K

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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?

Phosphorus
Silicon
Sulphur
Manganese

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