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Engineering Materials

Engineering Materials
Which of the following pipes is least corrosion resistant?

Mild steel
Brass
Cast iron
Wrought iron

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Engineering Materials
Tungsten in high speed steel provides

Toughness
Wear resistance
Sharp cutting edge
Hot hardness

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Engineering Materials
The ultimate tensile strength and yield strength of most of the metals, when temperature falls from 0 to 100°C will

Remain same
Decrease
Increase
First increase and then decrease

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Engineering Materials
Which of the following represents the allotropic forms of iron?

Alpha iron, beta iron and gamma iron
Body centered cubic iron and face centered cubic iron
Alpha iron and beta iron
Alpha iron, gamma from and delta iron

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Engineering Materials
Machining properties of steel are improved by adding

Sulphur, lead, phosphorous
Chromium, nickel
Silicon, aluminium, titanium
Vanadium, aluminium

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Engineering Materials
Beryllium bronze contains

99% copper and 1% beryllium
80% copper and 20% beryllium
60% copper and 40% beryllium
97.75% copper and 2.25% beryllium

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