ENGINEERING MATERIALS QUIZ

0.35 to 0.45%

0.4 to 0.6%

0.6 to 0.8%

0.0004

40 : 60

30 : 70

2.9375

2.1180555555556

None of these

Heated slightly above the lower critical temperature and then cooled slowly to a temperature of 600°C

Heated up to the lower critical temperature and then cooled in still air

Heated below the lower critical temperature and then cooled slowly

Copper and tin

Copper and zinc

Copper, tin and zinc

None of these

Eutectic cast irons

None of these

Hypoeutectic cast irons

Hypereutectic cast irons

Is same for all steels

Depends upon the rate of heating

Decreases as the carbon content in steel increases

Increases as the carbon content in steel increases

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

High machinability

Low melting point

All of these

High tensile strength

Creep

Plastic deformation

Fatigue

Endurance

2

0.4

0.1

0.02