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Engineering Materials

Engineering Materials
Taps dies and drills contain carbon

Above 1%
Above 2.2%
Below 1%
Below 0.5%

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

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Engineering Materials
Which of the following metal is used in making electrical resistance wire for electric furnaces and heating elements?

Phosphor bronze
Babbitt metal
Monel metal
Nichrome

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Engineering Materials
Delta-iron occurs between the temperature ranges of

600°C to 900°C
1400°C to 1530°C
900°C to 1400°C
400°C to 600°C

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

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

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Engineering Materials
Cementite consist of

13% carbon and 87% ferrite
13% ferrite and 87% cementite
13% cementite and 87% ferrite
6.67% carbon and 93.33% iron

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