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Engineering Materials

Engineering Materials
The machinability of steel is improved by adding

Sulphur, lead and phosphorus
Chromium
Nickel
Nickel and chromium

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Engineering Materials
Age-hardening is related with

Gun metal
Stainless steel
Duralumin
German silver

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

Increase wear resistance
Increase endurance strength
Reduce machinability
Increase hardenability

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Engineering Materials
The alloying element which can replace tungsten in high speed steels is

Molybdenum
Nickel
Vanadium
Cobalt

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Engineering Materials
In which of the following cases, consideration of creep is important

Flywheel of steam engine
Cycle chains
Cast iron pipes
Gas turbine blades

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Engineering Materials
Which of the following metal shrinks most from molten state to solid state?

Cast steel
Admiralty metal
Cast iron
Brass

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