Q1: 1. What is the primary benefit of using powder metallurgy in manufacturing processes?

• A) Increased material density
• B) Improved material properties
• C) Reduced material waste
• D) Faster production speed

Q2: 2. Which of the following is a common powder metallurgy process used to shape metal components?

• A) Injection molding
• B) Sand casting
• C) CNC machining
• D) Laser cutting

Q3: 3. What is the purpose of sintering in powder metallurgy?

• A) To increase material hardness
• B) To remove impurities from the powder
• C) To bond powder particles together
• D) To shape the metal component

Q4: 4. Which type of powder metallurgy process involves heating and compacting metal powder in a die?

• A) Cold isostatic pressing
• B) Hot isostatic pressing
• C) Powder injection molding
• D) Powder rolling

Q5: 5. What is the main advantage of powder metallurgy over traditional machining methods?

• A) Lower initial setup cost
• B) Higher material ductility
• C) Improved material purity
• D) Ability to produce complex shapes

Q6: 6. Which parameter has a significant impact on the final properties of a powder metallurgy product?

• A) Particle size distribution
• B) Ambient temperature
• C) Humidity level
• D) Mold pressure

Q7: 7. In powder metallurgy, what role does the lubricant play in the process?

• A) Enhances material strength
• B) Facilitates powder compaction
• C) Increases sintering temperature
• D) Improves surface finish

Q8: 8. Which of the following defects is commonly associated with powder metallurgy products?

• A) Warping
• B) Corrosion
• C) Fatigue cracking
• D) Porosity

Q9: 9. What is the purpose of adding alloying elements in powder metallurgy?

• A) Increase material hardness
• B) Reduce material density
• C) Enhance material ductility
• D) Improve material machinability

Q10: 10. Which factor is crucial in determining the green strength of a powder metallurgy compact?

• A) Sintering temperature
• B) Particle shape
• C) Lubricant content
• D) Compaction pressure

Q11: 11. What is the primary mechanism responsible for bonding powder particles during sintering?

• A) Diffusion
• B) Conduction
• C) Radiation
• D) Convection

Q12: 12. Which technique is commonly used to improve the mechanical properties of powder metallurgy components?

• A) Shot peening
• B) Annealing
• C) Shot blasting
• D) Flame hardening

Q13: 13. What is the purpose of adding a binder in powder metallurgy processes?

• A) Improve material machinability
• B) Facilitate powder compaction
• C) Enhance material ductility
• D) Increase sintering temperature

Q14: 14. Which of the following factors can affect the dimensional accuracy of powder metallurgy components?

• A) Sintering time
• B) Ambient humidity
• C) Lubricant viscosity
• D) Compaction pressure

Q15: 15. What is the purpose of degreasing in powder metallurgy processes?

• A) Remove impurities from the powder
• B) Improve material purity
• C) Enhance material ductility
• D) Eliminate residual lubricants

Q16: 16. Which parameter is critical in controlling the shrinkage of powder metallurgy components during sintering?

• A) Particle size distribution
• B) Sintering temperature
• C) Green density
• D) Binder content

Q17: 17. Which of the following powder metallurgy processes is suitable for producing intricate and small parts with high precision?

• A) Hot isostatic pressing
• B) Powder rolling
• C) Powder injection molding
• D) Cold isostatic pressing

Q18: 18. How does the green density of a powder metallurgy compact affect the final part properties?

• A) Higher green density results in lower strength
• B) Lower green density leads to increased porosity
• C) Green density has no impact on final properties
• D) Green density affects dimensional accuracy only

Q19: 19. What is the primary purpose of pre-alloyed powders in powder metallurgy?

• A) Increase material purity
• B) Enhance material ductility
• C) Improve material machinability
• D) Facilitate uniform alloy distribution

Q20: 20. Which of the following factors can affect the flowability of metal powders in powder metallurgy processes?

• A) Particle size distribution
• B) Ambient temperature
• C) Lubricant content
• D) Mold pressure

Q21: 21. In powder metallurgy, what is the purpose of post-sintering treatments such as impregnation?

• A) Increase material hardness
• B) Enhance material ductility
• C) Improve surface finish
• D) Fill pores with secondary materials

Q22: 22. Which of the following is a common application of powder metallurgy in the automotive industry?

• A) Aircraft engine components
• B) Brake pads
• C) Smartphone casings
• D) Bicycle frames

Q23: 23. What role does the lubricant play in the compaction stage of powder metallurgy?

• A) Enhances material strength
• B) Facilitates de-molding
• C) Improves material purity
• D) Reduces mold wear

Q24: 24. Which powder metallurgy process is suitable for producing parts with complex geometries and high material utilization efficiency?

• A) Powder injection molding
• B) Hot isostatic pressing
• C) Powder rolling
• D) Cold isostatic pressing

Q25: 25. What is the primary advantage of using powder metallurgy for producing magnetic components?

• A) Higher material density
• B) Improved material purity
• C) Enhanced magnetic properties
• D) Faster production speed