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Engineering Materials

Engineering Materials
Quenching is not necessary when hardening is done by

Nitriding
Case hardening
Any one of these
Flame hardening

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Engineering Materials
When a steel containing __________ 0.8% carbon is cooled slowly below the lower critical point, it consists of ferrite and pearlite.

Equal to
None of these
Less than
More than

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Engineering Materials
Compressive strength of grey cast iron in tonnes/cm is of the order of

710
35
57
1015

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Engineering Materials
The aluminium alloy, mainly used, for anodized utensil manufacture, is

Magnalium
Duralumin
Y-alloy
Hindalium

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Engineering Materials
The ability of a material to absorb energy in the plastic range is called

Fatigue strength
Resilience
Toughness
Creep

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Engineering Materials
Manganese is added in low carbon steel to

Make the steel ductile and of good bending qualities
All of these
Raise the yield point
Make the steel tougher and harder

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