Which element is added to steel to improve its toughness?

What is the primary objective of the hardening process? 

Stainless steel contains at least what percentage of chromium?

The graphite in grey cast iron is present in which form?

Which type of timber is most durable for outdoor use? 

What is the main difference between annealing and normalizing?

Which type of rubber is petroleum-based? 

Which material is commonly used for insulating high-temperature equipment?

What structural change occurs at the lower critical temperature of steel? 

Which of the following is a common method for case hardening?

Which property makes cast iron suitable for engine blocks?

Tool steel is primarily used for: 

Which non-ferrous metal is commonly used in electrical wiring? 

What happens to steel at the upper critical temperature?

What property is enhanced in steel by tempering? 

Which property is improved by adding molybdenum to alloy steel?

Synthetic rubber is commonly used in:

Which parameter determines the depth of case hardening?

Which property distinguishes ferrous metals from non-ferrous metals?

Which of the following materials is most commonly used to insulate electrical wires? 

Medium-carbon steel typically contains carbon in the range of: 

Stress relief annealing is performed to: 

The primary advantage of case hardening is: 

Which of the following is NOT typically considered an alloying element in steel? 

Which of the following is a softwood commonly used in construction?