Unit 3 and 4 quiz

Which of the following is the first step in powder metallurgy?

• • A) Sintering

• B) Compaction

• C) Powder Production

• D) Finishing

Which process is commonly used to produce metal powders in powder metallurgy?

• A) Cold rolling

• B) Atomization

• C) Annealing

• D) Extrusion

Which of the following factors affects the compaction process in powder metallurgy?

• A) Particle size and shape

• B) Alloy composition only

• C) Melting point of the powder

• D) Cooling rate

What is the primary advantage of powder metallurgy over traditional casting methods?

• A) Lower melting point

• B) Greater material strength

• C) Reduced machining

• D) Lower density

What is the primary purpose of sintering in powder metallurgy?

• A) To melt the powders

• B) To remove impurities

• C) To bond powder particles by solid-state diffusion

• D) To create pores in the material

What is the main disadvantage of powder metallurgy?

• A) High material utilization

• B) Limited shapes and geometries

• C) Requires high melting temperatures

• D) Slow production rates

What is the purpose of a lubricant in powder metallurgy pressing?

• A) To enhance sintering

• B) To reduce friction during compaction

• C) To increase porosity

• D) To alter chemical composition

In powder metallurgy, the process of applying pressure to shape the powder into a desired form is known as:

• A) Sintering

• B) Compaction

• C) Alloying

• D) Grinding

Which type of bonding primarily occurs during the sintering process in powder metallurgy?

• A) Ionic bonding

• B) Covalent bonding

• C) Metallic bonding

• D) Hydrogen bonding

Which method is commonly used to produce metal powders in powder metallurgy?

• A) Melting and casting

• B) Electrolysis

• C) CNC machining

• D) Rolling