Define Testing and list various reasons for testing.
[3 marks]Give characteristics of plastics, sink/float when immersed in to water (a) PP (b) PVC (c) PE (d) PTFE.
[4 marks]Define MFI. Explain Melt flow index test procedure with neat diagram.
[7 marks]Draw the test specimen as per ASTM for Flexural, Impact and Compression strength.
[3 marks]Give density of: LDPE, PS, PVC and PP.
[4 marks]Explain test procedure to determine Tear Strength of plastic film sample.
[7 marks]Give ASTM standard to determine Tensile strength for plastics material. Draw tensile test sample and explain test procedure in detail.
[7 marks]Plastic tensile test specimen has width and thickness about 8mm and 3mm respectively. If tensile strength at yield point is 600 kg/cm2. Calculate load recorded at yield point.
[3 marks]Define Conditioning. Give basic reasons for conditioning specimens. Give standard laboratory temperature and humidity.
[4 marks]Explain the test method to determine bulk (Apparent) density of plastic material in detail.
[7 marks]List three thermoplastic and three thermoset materials having self- extinguishing properties.
[3 marks]Explain spiral flow test for thermoset materials.
[4 marks]Define Hardness. Explain Rockwell hardness test as per ASTM standard.
[7 marks]Give flame characteristic and kinds of smoke generated during burning of PP and Nylon.
[3 marks]Explain test method to determine water absorption of plastics.
[4 marks]Define Flexural Strength. Explain the flexural strength test procedure and factors affecting the test results.
[7 marks]Give any one solvent for PE, PS, and PVC.
[3 marks]Explain sample preparation technique for thermoset materials.
[4 marks]Discuss determination of specific gravity of solid sample using specific gravity balance.
[7 marks]Give full name of: ASTM, ISO, and BS.
[3 marks]Explain stress-strain behavior for Plastic materials.
[4 marks]Define Impact strength. Explain Izod impact test procedure with factors affecting the test results. OR1
[7 marks]Calculate compressive strength of the specimen having Height 2.5 cm, Length 1.4 cm and Width 1.4 cm. Load recorded at crushing is 600 kg.
[3 marks]Explain cup flow test for thermoset materials.
[4 marks]Explain test procedure to determine Shear Strength of Plastic sample.2
[7 marks]