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Engineering Materials

Engineering Materials
Manganese in steel increases its

Hardness
Tensile strength
Ductility
Fluidity

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

Cold working
Shot peening
Surface decarburisation
Nitriding of surface

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Engineering Materials
German silver is an alloy of

Refined silver
Silver and some impurities
Nickel, Copper and zinc
Nickel and copper

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Engineering Materials
When steel containing less than 0.8% carbon is cooled slowly from temperatures above or within the critical range, it consists of

Mainly pearlite
Ferrite and pearlite
Pearlite and cementite
Mainly ferrite

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Engineering Materials
Which of the following has highest specific strength of all structural materials?

Magnetic steel alloys
Titanium alloys
Magnesium alloys
Chromium alloys

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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
In still air
Slowly in the furnace
Any one of these

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