Plastic Moulding Multiple Choice Questions
1. In which of the following plastic is used
A. Automobiles
B. Electrical appliances
C. Packaging
D. All of the above
2. Plastics can be shaped into
A. Sheets
B. Films
C. Fibers
D. All of the above
3. Plastics are principal ingredient of the following material(s)
A. Paints
B. Varnishes
C. Adhesives
D. All of the above
4. Which of the following plastics are made up of lines of long chain molecules?
A. Thermoplastics
B. Thermosetting plastics
C. Both A. and B.
D. None of the above
5. Credit cards are made of
A. Polyethylene
B. Polypropylene
C. Polyvinyl chloride (PVC)
D. Polystyrene
6. Milk and water bottles are made of
A. Polyethylene
B. Polypropylene
C. Polyvinyl chloride (PVC)
D. Polystyrene
7. Bottles for acidic foods like juices are made of
A. PTFE (polytetrafluoroethylene)
B. PET (polyethylene terephthalate)
C. Polyamide (nylon)
D. Acrylics (PMMA: polymethyl methacrylate)
8. Polyamide (nylon) is used for making
A. Bearings
B. Gears
C. Textiles and fabrics
D. All of the above
9. Which of the following plastics are made up of molecules that are heavily cross-linked?
A. Thermoplastics
B. Thermosetting plastics
C. Both A. and B.
D. None of the above
10. Which of the following plastics cannot be reshaped?
A. Thermoplastics
B. Thermosetting plastics
C. Both A. and B.
D. None of the above
11. Which of the following is an example of Thermosetting plastic?
A. PVC
B. Epoxies and Resins
C. PET
D. All of the above
12. Which of the following product(s) is (are) made by Compression moulding?
A. Electric plugs
B. Pot handles
C. Dinnerware plates
D. All of the above
13. There is no sprue and runner system in a
A. compression mold
B. injection mold
C. extrusion mold
D. all of the above
14. Which of the following is a type of Transfer Moulding?
A. Pot transfer moulding
B. Plunger transfer moulding
C. Both A. and B.
D. None of the above
15. In which of the following a die is used
A. Compression moulding
B. Injection moulding
C. Extrusion moulding
D. All of the above
16. Which of the following items are produced by Extrusion moulding?
A. structural shapes
B. Pipes
C. coated electrical wires
D. all of the above
17. The correct sequence of sections in extrusion moulding machine is
A. Feed section – Compression section – Metering section
B. Feed section – Metering section – Compression section
C. Compression section – Feed section – Metering section
D. Metering section – Feed section – Compression section
18. In extrusion moulding, the function of screen pack is to
A. Straighten flow of polymer melt
B. Filter out contaminants
C. Build pressure in metering section
D. All of the above
19. Coating of electrical wires is done with
A. compression moulding
B. injection moulding
C. extrusion moulding
D. all of the above
20. Which of the following is not a part of Injection moulding machine?
A. Ejector pins
B. Sprue
C. Nozzle
D. Breaker plate
21. Plastic bottles are manufactured by
A. Compression moulding
B. Transfer moulding
C. Blow moulding
D. All of the above
22. A starting tube in blow moulding is known as
A. harison
B. parison
C. garison
D. none of the above
23. Production rate of Injection Blow Moulding method is ___ of Extrusion Blow Moulding
A. lower than that
B. higher than that
C. equal
D. depends upon machine
24. The process of passing the feedstock through a series of rolls to reduce thickness to desired gage is known as
A. calendering
B. embossing
C. spinning
D. none of the above
25. The following welding of plastics is similar to that of oxy-acetylene welding in metals
A. Hot plate welding
B. Hot gas welding
C. Vibration welding
D. Spin welding
26. In Ultrasonic welding of plastics, heat is produced due to
A. surface friction
B. inter-molecular friction
C. both A. and B.
D. torch
27. In Friction (spin) welding of plastics
A. one part is stationary, other rotates
B. both parts rotate
C. both parts are stationary
D. depends upon types of plastics to be joined
28. Following is (are) the advantage(s) of Vibration welding of Plastics.
A. Join dissimilar shaped materials
B. simplicity of tooling
C. high production rates
D. all of the above