Certificate In Plastic Molding Science (Toys)

/30

Online Examination Detail:
Duration- 60 minutes.
Number of Questions- 30. (Multiple Choice Questions).
Maximum Marks- 100, Passing Marks- 40%.
There is no negative marking.

Candidate Details

NameEmailPhone Number

1 / 30

1. Injection pressure and holding pressure are same.

A. True

B. False

2 / 30

2. The heating and cooling of the thermos plastics _________the chemical nature.

A. Alters

B. Do not alter

C. Alters slightly

D. May be alters

3 / 30

3. ___________is distortion of product surface.

A. Short shots

B. Flash

C. Sink marks

D. Warpage

4 / 30

4. What are the types of injection moulding defects?

A. Sink mark

B. Weld line

C. Jetting

D. All of above

5 / 30

5. ________is undesirable extra material appearing at parting line.

A. Runner

B. Flash

C. Cold slug

D. Sprue

6 / 30

6. HDPE is a tough plastic used for making toys

A. TRUE

B. FALSE

7 / 30

7. Which of the following is an example of thermoplastic material?

A. Camera bodies

B. Automobile parts

C. Electric plugs

D. Electric insulation

8 / 30

8. What is a Mold?

A. It is a custom build tool in which we convert plastic raw material into finished product.

B. It is a custom build tool in which we convert sheet metal strips into final product.

C. It can be used for both plastic and sheet metal components

D. It is a cutting tool operation

9 / 30

9. Specific gravity of the plastics is usually.

A. Less than the specific gravity of metals

B. More than the specific gravity of metals

C. Similar to the specific gravity of metals

D. Unpredictable

10 / 30

10. Plastic resin is used in the paint industry as _________.

A. Catalyst

B. Ion exchanger

C. Inhibitor

D. Coolant

11 / 30

11. Polyamides is also known as_________.

A. Nylon

B. Polycarbonate

C. Phenolics

D. All of above

12 / 30

12. The plastics which soften when heat is applied with or without pressure, but requires cooling to set them to shape are called as;

A. Thermosofting materials

B. Thermosetting materials

C. Thermoplastic materials

D. Thermos tatting materials

13 / 30

13. What are the divided sections of screw of injection mouldingmachines?

A. Feed zone

B. Compression zone

C. Melting zone

D. All of them

14 / 30

14. What is the use of epoxy resin from commercial point of view?

A. As strength adhesives

B. As cementing agents

C. Cast objects and laminates

D. All of the mentioned

15 / 30

15. Plastics are the materials obtained by mixing the __________ with the other ingredients whichimpart special engineering properties.

A. Resin

B. Monomer

C. Catalyst

D. Any polymer

16 / 30

16. ____________time needed by plunger to force melt in cavity of closed mould.

A. Closing time

B. Holding time

C. Injection time

D. None of them

17 / 30

17. The word plastic comes from _________.

A. Plastic

B. Plastron

C. Plastics

D. Pasters

18 / 30

18. Plastics are ________ in weight.

A. Very heavy

B. Light

C. Negligible

D. Heavy

19 / 30

19. Where does the granular moulding material get loaded into?

A. Barrel

B. Hopper

C. Pellets

D. Split

20 / 30

20. Thermos plastics becomes ________ on heating.

A. Rigid

B. Moulded

C. Soft

D. Brittle

21 / 30

21. Injection moulding is the ideal method for processing.

A. Plastics

B. Thermos plastics

C. Thermos setting plastics

D. Nonferrous materials

22 / 30

22. Which of the following is a thermosetting polymer?

A. Polystyrene

B. Polyolefins

C. Nylons

D. Phenolic resins

23 / 30

23. the advantages of plastics?

A. Low strength

B. Low heat resistance

C. Poor mechanical properties

D. Easily available

24 / 30

24. What are the main elements of Mold?

A. Core and cavity

B. Drill

C. Fixture

D. All of them

25 / 30

25. Fixed half of mould is attached to________.

A. Fixed platen

B. Moving platen

C. Tool post

D. Tool holder

26 / 30

26. What are theadvantages ofplastics over metals?

A. Low weight

B. Corrosion resistance

C. Insulation properties

D. All of them

27 / 30

27. Plastic toys are usually produced by using:

A. Shell moulding

B. Injection moulding

C. Green sand moulding

D. Plaster moulding

28 / 30

28. ____________ type of cooling is usually employed to cool core of long cylindrical products.

A. Bubble cooling

B. Spiral cooling

C. Both of them

D. None of them

29 / 30

29. What are the general types of Molds?

A. Injection Molds

B. Compression Molds

C. Transfer Molds

D. All of the above

30 / 30

30. Which plastic materials contain strong cross linking’s in their molecular structure?

A. Thermoplastic materials

B. Thermosetting materials

C. Both (a) and (b).

D. None of the above

Exit