Engineering Materials
Corrosion resistance of steel is increased by addition of

Vanadium, aluminium
Chromium and nickel
Tungsten, molybdenum, vanadium, chromium
Sulphur, phosphorus, lead

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Engineering Materials
Pick up wrong statement about wrought iron

It is very soft and ductile
It melts at 1535°C
It is made by adding suitable percentage of carbon to molten iron and subjecting the product to repeated hammering and rolling
It contains carbon of the order of 0 to 0.25%

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Engineering Materials
Dow metal contains

90% magnesium and 9% aluminium with some copper
90% aluminium and 90% copper
92.5% aluminium and, 4% copper, 2% nickel and 1.5% Mg
94% aluminium, 4% copper and 0.5% Mn, Mg, Si and Fe

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Engineering Materials
A coarse grained steel

Is more ductile and has a less tendency to distort during heat treatment
Is more ductile and has a greater tendency to distort during heat treatment
Is less tough and has a less tendency to distort during heat treatment
Is less tough and has a greater tendency to distort during heat treatment

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