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Engineering Materials

Engineering Materials
Iron-carbon alloys containing carbon ________ 4.3% are known as hyper-eutectic cast irons.

Less than
None of these
More than
Equal to

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Engineering Materials
Chromium when added to steel _________ the tensile strength.

None of these
Increases
Does not effect
Decreases

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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

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

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Engineering Materials
Manganese is added in low carbon steel to

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

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Engineering Materials
Neutral solution is one which has pH value

Less than 7
pH value has nothing to do with neutral solution
Equal to 7
Greater than 7

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Engineering Materials
Which of the following is not the correct method of increasing fatigue limit?

Surface decarburisation
Cold working
Nitriding of surface
Shot peening

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