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Engineering Materials

Engineering Materials
Taps dies and drills contain carbon

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

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Engineering Materials
A small percentage of boron is added to steel in order to

Increase endurance strength
Increase hardenability
Increase wear resistance
Reduce machinability

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Engineering Materials
The machinability of steel is increased by

Silicon and sulphur
Sulphur, graphite and aluminium
Phosphorous and aluminium
Phosphorous, lead and sulphur

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Engineering Materials
Malleability of a material can be defined as

Ability to undergo large permanent deformations in tension
All of these
Ability to recover its original form
Ability to undergo large permanent deformations in compression

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Engineering Materials
Admiralty brass used for steam condenser tubes contains copper and zinc in the following ratio

40 : 60
2.9375
2.1180555555556
30 : 70

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Engineering Materials
The portion of the blast furnace below its widest cross-section is called

Stack
Hearth
Bosh
Throat

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