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Engineering Materials

Engineering Materials
The bond formed by transferring electrons from one atom to another is called

Metallic bond
Covalent bond
None of these
Ionic bond

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Engineering Materials
The hardness of steel increases if it contains

Pearlite
Martensite
Cementite
Austenite

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Engineering Materials
The machinability of steel is increased by

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

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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

Pearlite and cementite
Ferrite and pearlite
Mainly pearlite
Mainly ferrite

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Engineering Materials
Acidic solution is one which has pH value

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

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Engineering Materials
Addition of lead and bismuth to aluminium results in

One of the best known age and precipitation hardening systems
Improvement of corrosion resistance
Improving machinability
Improvement of casting characteristics

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