Engineering Materials
Which of the following statements are true for annealing of steels?

Steels are heated to 500 to 700°C
Cooling is done slowly and steadily
Internal stresses are relieved
All of these

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Engineering Materials
Aluminium bronze contains

90% magnesium and 9% aluminium with some copper
92.5% aluminium, 4% copper, 2% nickel, and 1.5% Mg
94% aluminium, 4% copper and 0.5% Mn, Mg, Si and Fe
10% aluminium and 90% copper

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Engineering Materials
Chromium in steel

Improves wear resistance, cutting ability and toughness
Gives ductility, toughness, tensile strength and anti-corrosion properties
Improves cutting ability and reduces hardenability
Refines grain size and produces less tendency to carburisation, improves corrosion and heat resistant properties

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