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Engineering Materials

Engineering Materials
Which of the following alloys does not have copper as one of the constituents?

Constantan
Nichrome
Delta metal
Monel metal

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

Increase wear resistance
Increase hardenability
Reduce machinability
Increase endurance strength

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Engineering Materials
The silicon steel is widely used for

Connecting rods
Generators and transformers in the form of laminated cores
Motor car crankshafts
Cutting tools

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Engineering Materials
Which of the following material has maximum ductility?

Mild steel
Copper
Aluminium
Nickel

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Engineering Materials
Gamma iron exits at following temperature

Near melting point
Between 910°C and 1400°C
Room temperature
Between 1400°C and 1539°C

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Engineering Materials
Closed packed hexagonal space lattice is found in

Zinc, magnesium, cobalt, cadmium, antimony and bismuth
None of these
Alpha-iron, tungsten, chromium and molybdenum
Gamma-iron, aluminium, copper, lead, silver and nickel

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