Give ASTM standards of following testes: 1) Tensile 2) Water absorption 3) MFI test.
[3 marks]Identify the following plastics based on flame and kinds of smoke generated during burning (1) PE (2) PVC (3) Nylon (4) PS.
[4 marks]Define Impact strength. Explain test procedure to determine Izod impact strength with neat diagram.
[7 marks]Give the behavior of following plastics when immersed in water- sink/float.
[3 marks]PP (b) HDPE (c) PVC.
[ marks]Explain water absorption test method for plastics.
[4 marks]Define flexural strength. Explain 3-point bending flexural strength test procedure with neat diagram.
[7 marks]Discuss determination of specific gravity of solid sample using specific gravity balance.
[7 marks]Explain spiral flow test with diagram.
[3 marks]List and discuss processes used for specimen preparation from thermoplastic.
[4 marks]Define compressive strength. Explain test procedure to determine compressive strength.
[7 marks]MFI test of HDPE is carried out at temperature 190°Cand 2.16 kg load. The average extruded weight of the sample is 1.60 g. Test is carried out at time interval of 60 seconds. Calculate MFI value of a given material.
[3 marks]Give basic reasons for conditioning specimens. Give standard laboratory temperature and humidity.
[4 marks]Explain test procedure to determine Trouser Tear Strength of plastic film sample.
[7 marks]Give density of (1) LDPE (2) PVC (3) PS.
[3 marks]Define: Stress, Strain, Modulus of elasticity, proportional limit
[4 marks]List the methods to identify plastic materials and explain (i) drop sound test, (ii) flotation test, (iii) Visual examination, (iv) copper wire test.
[7 marks]State the full forms of ISO, ASTM and BIS.
[3 marks]Define bulk density. Explain test procedure to determine bulk density.
[4 marks]Define MFI. Explain Melt flow index test procedure as per ASTM standard with neat diagram.1
[7 marks]Draw the test specimen as per ASTM for Flexural, Impact and Compression test.
[3 marks]Explain falling dart Impact test for Plastic film.
[4 marks]Define Hardness. Explain Rockwell hardness test as per ASTM standard.
[7 marks]Give difference between Izod and Charpy Impact test.
[3 marks]Explain Shore Dhardness (Durometer hardness) test for Plastics.
[4 marks]Draw and explain a typical Stress-Strain curve.
[7 marks]