Casting, Forming and Welding II Practice Test 1

1. In extrusion blow moulding process, it is very difficult to trim away excess of plastics.

2. Where does the granular molding material get loaded into?

3. In thermoforming, it is very easy to mould the plastic materials which are of crystalline nature.

4. Which of the following is a light metal?

5. In the extrusion process, a cast type barrel is mainly used for the heating of polymer material.

6. Components from injection moulding process are made very expensive due to the application of very costly equipment.

7. In extrusion process, extra shearing occurs in which part of the system?

8. Thermosetting polymers can be processed by extrusion process by forming cross-linking in the extruder.

9. What is the minimum air pressure required in the blow molding process?

10. What is the maximum pressure required in a compression molding process?