1.Which of the following metallic powders requires the lowest compaction pressur

Question

1.Which of the following metallic powders requires the lowest compaction pressures? A. Aluminum. B. Iron. C. Steel.

2.Only thermoplastic molding compounds can be used in powder injection molding. A True B False

3.The rake face of the cutting tool directs the flow of the newly formed chip in a machining operation. A True B False

4.Secondary shear occurs in the chip as it slides along the rake face of the cutting tool; it is caused by friction between the chip and the tool that resists the flow of the chip along the rake face. A True B False

5.According to the Merchant equation, an increase in tool-chip friction has which two of the following effects, all other factors being the same? Select all that apply.

A. Decrease in friction angle.

B. Decrease in power requirements.

C. Decrease in shear plane angle.

D. Increase in cutting temperature.

E. Increase in friction angle.

F. Increase in shear plane angle.

Explanation / Answer

1. Aluminium parts are compacted at low pressure and aluminium is simpler to compact compared to other metals.

2. Flase. Metal powder and thermoplastic molding compounds can be used in powder injection molding

3. True. The rake face of the cutting tool directs the flow of the newly formed chip in a machining operation, is oriented in a certain angle called rake angle.

4. True

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