When inspecting a plastic part you have never seen before and have no information on, which of the following specifically indicate that it was injection molded? 

For many engineering plastics, the cooling rate during processing strongly influences the level of crystallinity, which in turn has a strong influence on the uniformity of the properties throughout the part.

Composites can have isotropic properties.

Which of the following is the most important design consideration for resin transfer molding tools?

Hot wire cutting is primarily used for cutting hard thermosetting materials

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