A. Compression
B. Injection
C. Transfer
D. Extrusion
Related Mcqs:
- Plastic articles are normally produced by _____________ moulding?
A. Green sand
B. Injection
C. Shell
D. Dry sand - _____________ is a thermosetting plastic ?
A. PVC
B. Polythene
C. Bakelite
D. Polystyrene - Plastic tubes & pipes are generally made by ______________ moulding?
A. Injection
B. Transfer
C. Extrusion
D. Compression - Thermosetting polymers as compared to thermoplastic polymers_____________________?
A. Are formed by addition polymerisation
B. Have three dimensional structure
C. Have linear structure
D. None of these - All thermoplastic, thermosetting & elastic materials can be processed in a extrusion machine, however it cannot be used for the production of plastic_______________?
A. Filaments
B. Pipes
C. Buckets
D. Tubings - Thermosetting resins/polymers as compared to thermoplastic ones are ____________________?
A. Soluble in all organic solvents
B. More brittle
C. Formed by addition polymerisation only
D. Easily reshaped & reused - Thermosetting materials_________________?
A. Are cross-linked molecules
B. Soften on application of heat
C. Are solvent soluble
D. None of these - Polymers are classified into four categories namely thermosetting, thermoplastic, elastomer and fibre depending upon their________________?
A. Molecular sizes
B. Magnitude of intermolecular forces
C. Resistance to heat
D. Polymerisation mechanism
Answer: Option B - Thermosetting plastic materials___________________?
A. Can be repeatedly melted
B. Is useful for melt casting
C. Cannot be melted after forming
D. Is useful for spinning - Most of the plastics are safe to be used upto a maximum temperature of ______________ °C?
A. 100
B. 150
C. 350
D. 450
