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Engineering Materials

Engineering Materials
Quenching is not necessary when hardening is done by

Flame hardening
Case hardening
Nitriding
Any one of these

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Engineering Materials
In compression, a prism of brittle material will break

By shearing along oblique plane
By crushing into thousands of pieces
By forming a bulge
In direction perpendicular to application of load

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Engineering Materials
Iron-carbon alloys containing 1.7 to 4.3% carbon are known as

None of these
Hypoeutectic cast irons
Eutectic cast irons
Hypereutectic cast irons

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

High speed steel
Heat resisting steel
Nickel steel
Stainless steel

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Engineering Materials
In full annealing, the hypo eutectoid steel is heated from 30°C to 50°C above the upper critical temperature and then cooled

In still air
Slowly in the furnace
Any one of these
Suddenly in a suitable cooling medium

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Engineering Materials
Balls for ball bearings are made of

Cast iron
Mild steel
Carbon-chrome steel
Stainless steel

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