Material Knowledge

Which property is improved by adding carbon into steel ?

• Hardness

• Ductility

• Malleability

Which property allows the metal to change shapes without breaking ?

• Hardness

• Ductility

• Malleability

Which property indicates the ability of a metal to become liquid ?

• Hardness

• Ductility

• Fusibility

What is the testing method to identifying ferrous metals ?

• Tap testing

• Ultrasonic testing

• Spark testing

The 18-8 stainless steel in content of ...

• 18 percent chromium and 8 percent nickel

• 18 percent nickel and 8 percent chromium

• 18 percent chromium and 8 percent carbon

What is the maximum carbon % to increase the hardness ?

• 0.75

• 0.80

• 0.85

Which heat treatment method is conduct below the critical temperature ?

• Annealing

• Tempering

• Normalizing

Which gas is use in nitriding method ?

• Carbon dioxide

• Nitrogen

• Ammonia

Which manufacturing method is forcing metal through an opening die ?

• Extrusion

• Hammering

• Casting

1234 Aluminum in accordance with aluminum alloy designations is ... ?

• 99.00% Aluminum with 2 control over individual impurities

• 99.34% Aluminum with 2 control over individual impurities

• 99.12% Aluminum with 1 control over individual impurities