What material is commonly used for blow molding?

What are two most important concerns when machining plastic materials?

Which process is commonly used to add layers of plastic insulation to extension cords? 

For standard plastic injection molding and extrusion machines, we have a kneed screw driving the feedstock material through the heater barrel. What is the main purpose of this screw? 

Ejector pin marks on manufactured goods indicate that the part was made using blow molding

What are the major differences between thermoplastic, thermosetting, and hyperelastic polymer materials? (Hint: What is always true about these types of materials?)

Define “subtractive manufacturing”

Which of the following statements regarding fire walls is MOST accurate? 

Which of the following statements about portable fire extinguishers is MOST accurate? 

When allowing hot work operations to proceed, at least one fire extinguisher with a minimum 2-A:20-B:C rating should be located within 30 ft. of where the hot work is being conducted.