WorksheetsMP Subjective and Objective
Total questions: 10
Worksheet time: 35mins
Describe the key steps involved in the powder metallurgy process. How do parameters such as particle size, compaction pressure, and sintering temperature affect the final mechanical properties of the product? (In 500 words)
Explain the differences between injection molding, compression molding, and extrusion processes in terms of material flow, tooling requirements, and product characteristics. (500 words)
Differentiate between hot forging, warm forging, and cold forging in terms of temperature range, metal flow behavior, energy requirement, and surface finish. (300 words)
Explain the purpose of lubricants and binders during powder compaction. (100 words)
Describe the sequence of operations in closed-die forging. What are flash and gutter, and why are they important? (250 words)
Define blanking and piercing. (100 words)
Which of the following plastic processing methods is used primarily for manufacturing bottles and hollow containers?
A) Compression molding
B) Injection molding
C) Blow molding
D) Transfer molding
In forging, the term flash refers to:
A) A crack in the forged part
B) Extra metal squeezed out between die halves
C) A polishing defect
D) None of the above
The main purpose of adding plasticizers to polymers is to:
A) Increase hardness
B) Improve flexibility and reduce brittleness
C) Increase melting point
D) Reduce color fading
The green compact formed after pressing is weak because:
A) It contains residual moisture
B) There is no metallurgical bonding yet
C) The powder particles are fully fused
D) The density is higher than theoretical
