ENGINEERING MATERIALS QUIZ

Greater than 7

Less than 7

pH value has nothing to do with basic solution

Equal to 7

There is no change in grain size

The average grain size is a minimum

The grain size first increases and then decreases very rapidly

The grain size increases very rapidly

1% silver

No silver

5% silver

2% silver

Cast iron

Mild steel

Wrought iron

Brass

Provides high hot hardness

Promotes decarburisation

Forms very hard carbides and thus increases wear resistance

Promotes retention of austenite

Cycle chains

Cast iron pipes

Flywheel of steam engine

Gas turbine blades

Alloy of tin, lead and cadmium

Iron scrap and zinc

88% copper, 10% tin and rest zinc

63 to 67% nickel and 30% copper

Zinc

Lead

Silver

Glass

Gives ductility, toughness, tensile strength and anti-corrosion properties

Refines grain size and produces less tendency to carburisation, improves corrosion and heat resistant properties

Improves wear resistance, cutting ability and toughness

Improves cutting ability and reduces hardenability

Tin

Sulphur

Zinc

Vanadium