CENTRAL INSTITUTE OF PLASTICS ENGINEERING & TECHNOLOGY
Question Bank
3 MARK --- QUESTION
4/5 MARK ----QUESTION
COURSE : DPT
SEMESTER : IV
SUBJECT : Plastics Testing – I
1. Which of the following is Indian Standardization Organization?
a) BIS b) IEC c) ISO d) BS
Ans.: a) BIS
2. Which of the following is long term property?
a) Creep b) Stress Relaxation c) both (a) & (b) d) none of the above
Ans.: c) both (a) & (b)
3. Which of the following is the unit of HDT?
a) oC/Min b) oC c) MPa d) mm/ oC
Ans.: b) oC
4. Select a hard and tough material out of the following?
a) PC b) PP c) Nylon-6 d) POM
Ans.: a) PC
5. Which of the following plastics material has got the lowest density?
a) POM b) Polycarbonate c) PET d) PP
Ans.: d) PP
6. Write the unit of VST.
a) V/Mil b) oC c) Unit less d) g/cc
Ans.: b) oC
7. Which of the following is an International Standards Body?
a) ASTM b) BIS c) IEC d) DIN
Ans.: c) IEC
8. What is the unit of Tensile Modulus?
a) MPa b) Kgf c) gm/10 mins d) Unit less
Ans.: a) MPa
9. What is the recommended notch depth for IZOD impact test as per ASTM?
a) 0.1 inch b) 1 inch c) 0.01 inch d) 1.1 inch
Ans.: c) 0.01 inch
10. What temperature and load is preferable for Polypropylene in MFI test?
a) 230°C & 5 kg b) 230°C & 2.16 kg c) 190°C & 5 kg d) 200°C & 2.16 kg
Ans.: b) 230°C & 2.16 kg
11. Which of the following ASTM test method is applicable for Cup Flow test?
a) ASTM D785 b) ASTM D570 c) ASTM D3123 d) ASTM D731
Ans.: d) ASTM D731
12. Which of the following ASTM test method applicable for Spiral Flow test?
a) ASTM D1003 b) ASTM D790 c) ASTM D3123 d) ASTM D731
Ans.: ASTM D3123
13. Which type of hardness test is most suitable for flexible PVC?
a) Durometer Shore Hardness b) Rockwell c) Barcol d) None of the above
Ans.: a) Durometer Shore Hardness
14. Which test method is used for Density by Density Gradient Technique?
a) ASTM D1525 b) ASTM D792 c) ASTM D1505 d) ASTM D732
Ans.: c) ASTM D1505
15. Which test method is used for Vicat Softening Temperature?
a) ASTM D1525 b) ASTM D1238 c) ASTM D1505 d) ASTM D648
Ans.: a) ASTM D1525
16. Which test method is used for HDT test?
a) ASTM D1525 b) ASTM D638 c) ASTM D792 d) ASTM D648
Ans.: d) ASTM D648
17. Name two specimen preparation techniques.
Ans.: Injection Molding and Punching or using counter cutter.
18. Which amongst the following has the highest Density?
a) PC b) PP c) Nylon-6 d) PTFE
Ans.: d) PTFE
19. Name two plastics which float in water.
Ans.: PP & PE
20. Name two Self-extinguishing Plastics materials.
Ans.: PVC and PTFE.
21. What notch depth used for notching Izod test specimen as per ASTM method?
Ans.: 2.54 mm
22. What is the unit of Coefficient of Thermal Conductivity (K)?
a) V/Mil b) oC c) Unit less d) W/mK
Ans.: d) W/mK
23. What is the unit of MFI ?
a) g/ 60sec b) Kg/10min c) g/10min d) Both (a) & (c)
Ans.: c) g/10min
24. In Stress-Strain curve of tensile strength of plastics up to which point the elongation property is found
to be reversible?
Ans.: Elastics Limit
25. What is the unit of Coefficient of Linear Thermal Expansion (CLTE)?
a) V/Mil b) /oC c) Unit less d) W/mK
Ans.: b) /oC
26. What is the ASTM Standard for Conditioning of test specimen?
a) D 648 b) D 618 c) D 638 d) D 177
Ans.: b) D 618
27. The following test is used for grading of material based on processability?
a) Melting Point b) Melt Flow Index c) Vicat Softening Point d) Heat Deflection Temperature
Ans.: b) Melt Flow Index
28. Which of the following is not a Rockwell Hardness scale?
a) L b) M c) N d) R
Ans.: c) N
29. Which of the following material melts and drips during burning?
a) PP b) PVC c) PS d) PC
Ans.: a) PP
30. What is need of Testing?
a) For quality control b)To meet standard c)Safety d)All of the above
Ans.: d)All of the above
31. What is the Diameter and Length of the Die used in MFI test as per ASTM D1238?
a) 2.095 + 0.005mm & (8+ 0.025mm) b) 2.009 + 0.0051mm & (8 + 0.025mm) c) 2.9 + 0.051mm & (8
+ 0.0025mm) d) None of these
Ans.: a) 2.095 + 0.005mm & (8+ 0.025mm)
32. Write formula for Relative Viscosity.
Ans.: Relative viscosity = ηre1 = t/t0
33. Write the significance of Mark-Houwink equation.
a) To determine Tg b) To calculate viscosity c) To calculate Mw d) Both (b) & (c)
Ans.: d) Both (b) & (c)
34. Write Mark-Houwink equation.
Ans.: [η]=KMα
35. Name of Machine which is used for testing Tensile, Flexural and Compressive properties of plastics.
Ans.: UTM (Universal Testing Machine)
36. The test result for Tensile strength depends on
a) Temperature b) Humidity c) Straining rate d) All ofthe above.
d) All of the above.
37. The test result for Flexural strength depend on a) Temperature b) Humidity c) Strain rate d) All of the above
Ans.: d) All of the above.
38. What is the size of a HDT specimen?
Ans.: 127mmx12.7mmx3.2mm
39. What are the scales used for Rockwell hardness test.
Ans.: R L M E K
40. Which of the following materials is Self Extinguishing in nature?
a .Polypropylene b) Polystyrene c) PVC d) HDPE Ans.: c) PVC
41. What is the use of Guarded Hot Plate Apparatus?
Ans.: To measure Coefficient of Thermal Conductivity
42. Define Stress-Relaxation?
Ans.: Decrease in Stress with time at a constant Strain is called as Stress-Relaxation .
43. As the temperature increases, tensile strength of material increases or decreases?
Ans.: a) Increases
44. What is the included angle of notch in the impact test specimen?
Ans.: b) 45°
45. Is MFI is directly proportional to Viscosity?
Ans.: No
46. What is the density of material which floats on water ?
Ans.: < 1
47. Cup Flow Test is specially designed for which material ?
Ans.: Thermosetting Compound
48. What is the unit of Stress?
Ans.: a) N/mm²
49. Is Stress relaxation is short term mechanical properties?
Ans.: No
50. What is the test method for determination of Shear Strength?
Ans.: b) ASTM D 732
51. What is the unit of Shear Strength ?
Ans.: N /mm2 or MPa
52. Define Pycnometer ?
Ans.: Glass Density bottle which is used in Density test is known as Pycnometer .
53. What are the methods used for testing flexural properties of plastic material?
Ans.: Three Point & Four Point are the methods .
54. What is the size of the specimen used in flexural propertie as per ASTM.
Ans.: 127x12.7x3.2 mm
55. Is Flexural Bending load is a combination of Compressive and Tensile load?
Ans.: Yes
56. Write formula for flexural strength.
Ans.: S=3PL/2bd2
57. Shock loading characteristic of a material is determined by which properties?
Ans.: b) Impact
58. What is the unit of impact strength?
Ans.: Kj/m2 or J/m
59. Is large radius of curvature at base of Notch in Izod specimen will gives high impact strength? Say
True / False
Ans.: No
60. What is the unit of Hardness?
Ans.: c) No Unit (Unit less)
61. What is the size of specimen for Izod impact test as per ASTM D256?
Ans.: 63mm x 12.7mm x 3.2 mm
62. What is the ASTM Method used for Barcol Hardness ?
Ans.: ASTM D2583
63. What is the ASTM Method used for Brittleness Temperature Test?
Ans.: ASTM D 746
64. What is the use of Brook Field Viscometer?
Ans.: is used for measuring viscosity of resin.
65. Which of the following tests is used as processability test for flow determination ______ a) CTI b)HDT c) MFI d) VST
Ans.: c) MFI
66. UTM is be used for the determination of which properties of plastic materials?
Ans.: a) Tensile strength b) Flexural strength c) Compressive strength
67. What is the Unit of modulus of elasticity ?
Ans.: a) lb/in2 or kgf/cm2 or N/mm2
68. What is the minor load used in R-scale of Rockwell hardness test ?
Ans.: a) 10 kg.
69. What is the penetration length of needle in VST?
Ans.: 1 mm
70. What is the use of Extensometer?
Ans.: To measure the elongation of the plastic material by using UTM.
71. Define Necking?
Ans.: The localized reduction in cross section that may occur in a material under tensile stress is
called Necking.
72. What is the unit of Elongation at break?
Ans.: Percentage (%)
73. Define Hardness?
Ans.: To measure the resistance of plastic materials to compression and indentation is called
Hardness.
74. Define Proportional Limit?
Ans.: The greatest stress that a material is capable of sustaining without deviation from
proportionality of stress and strain is called Proportional Limit.
75. Define Shear Strength?
Ans.: The maximum load required to shear a specimen in such a manner that the resulting pieces
are completely clear of each other is called Shear Strength.
76. The test specimen dimension for flexural test as per ASTM standard is ________________.
Ans.: 127x12.7x3.2 mm.
77. Melting point of Nylon 6 is ___________°C.
Ans.: 223-225
78. __________ is used as solvent for viscosity determination in the case of PVC.
Ans.: Cyclohexanone.
79. Resistance to deformation under constant load with respect to time is called as __________.
Ans.: Creep
80. Area under Stress-strain curve is called _____________.
Ans.: Toughness
81. Dimensions for Compression test is length _____ (mm) thickness ___ (mm) width ____ (mm).
Ans.: 25.4(mm), 12.7(mm) & 12.7 (mm)
82. Ratio of stress to corresponding strain in stress-strain curve is called _____________.
Ans.: Modulus of Elasticity
83. Arrange following material in increasing order of their hardness _______LDPE, PF, ABS.
Ans.: LDPE, ABS, PF.
84. ASTM standard generally used for conditioning of test specimens is ASTMD______.
Ans.: ASTMD 618.
85. Max. Service temperature of plastics is also known as _______ (HDT/VSP).
Ans.: HDT
86. Color of flame when PVC is burnt ______________.
Ans:Yellow with Green base.
87. At Yield point in Stress-Strain curve __________ increases without increasing stress?
Ans.: Strain
88. Combined characteristics of fusion under pressure, melt viscosity and gelation rate under specific
conditions for Thermoset material is studied by ______________ test.
Ans.: Spiral Flow Test
89. ISO _______ is the equivalent to ASTM 638 Test method for Tensile test of plastics.
Ans.: 527
90. _____________ is defined as the ratio of the volume of any given quantity of the loose plastic
material to the volume of the same quantity of the material after molding or forming. Ans.: Bulk
Factor
91. Dumbbell shaped test specimens are preferred for _____________Test.
a) Tensile b) Flexural c) Izod Impact d) Charpy Impact
Ans.: a) Tensile
92. The oil heating rate used for VST is ________°C/hour or _______°C/hour.
Ans.: 50 °C/hour or 120 °C/hour.
93. HDT is defined as the temperature in which a standard test of ________ size is used.
Ans.: 127x12.7x3.2 mm
94. HDT is defined as the temperature at which a standard test deflects _____ mm under a stated load
of either ____ MPa or _____ MPa.
Ans.: 0.455 MPa or 1.82 MPa.
95. Rate of rise of temperature in HDT test is used as _____________°C/hour.
Ans.: 2+ 0.2
96. Angle of Notch for IZOD test specimen as per ASTM__________ is 45o .
Ans.: 45o
97. MFI test for Polyethylene as per ASTM D 1238 is carried at ______ °C and _____ kg Weight.
Ans.: 230°C and 2.16 kg Weight.
98. Melting point of HDPE is _____________.
a) 160°C b) 135°C c) 110°C d) 215°C
Ans.: b) 135°C
99. MFI for Polycarbonate as per ASTM D 1238 is carried at _____ °C and _____ kg Weight?
Ans.: 300°C and 1.2 kg Weight.
100. If tensile strength refers to resistance to stretching then in the similar sense the flexural strength
should be defined as resistance to _____________.
Ans.: Bending
101. Compression Molded specimen are relatively stress free. Say True / False.
Ans.: True
102. Injection Molded components have lower HDT than Compression molded components. Say True /
False.
Ans.: True
103. Specimen is mounted Horizontally in Charpy impact test. Say True / False
Ans.: True
104. Specimen Clamped Horizontally in Izod Impact test. Say True / False
Ans.: False
105. Polystyrene produces metallic sound when it is dropped on a hard surface. Say True / False
Ans.: True
106. Molecular orientation has significant effect on Flexural test results-say True or False.
Ans.: True
107. Tensile Strength increases as Humidity increases-say True of False
Ans.: False
108. Tensile strength of plastics depends on the direction of orientation-Say True or False.
Ans.: True
109. Uncured resin shows lower hardness than cured resin. Say True / False
Ans.: True
110. Durameter (Shore) Hardness test is used for relatively soft material. Say True / False
Ans.: True
111. Abrasion Resistance is expressed in mg/1000 revolution. Say True / False
Ans.: True
112. The unit of Young’s modulus is same as Tensile Strength-say True or False
Ans.: True
113. Impact strength of plastics does not depend on lab temperature-say True or False.
Ans.: False
114. At yield point in Stress-Strain curve, strain increases at constant stress-say True or False.
Ans.: True
115. Unit for Specific Gravity is kg/m3
. True / False
Ans.: False
116. Specific gravity having no unit. True / False
Ans.: True
117. Melt Flow Index test is not carried out for PVC-Say True or False.
Ans.: True
118. As angle of notch is decreases, Izod Impact strength of specimen also decreases- Say True or
False
Ans.: True
119. The data obtained by HDT method cannot be used to predict the behavior of plastics materials at
elevated temperature-Say True or False
Ans.: True
120. HDT of the unannealed specimen is usually lower than that for a comparable annealed specimen.
–Say True or False
Ans.: True
121. The bulk factor is equal to the ratio of density after molding or forming to the apparent density of
material-Say True or False
Ans.: True
122. The density of plastic materials is defined as weight per unit volume-True or False
Ans.: True
123. Injection molded tensile test specimens show higher strength than specimens cut by counter cutterSay True or False.
Ans.: True
124. As laboratory room temperature increases, tensile strength also increases-Say True or False.
Ans.: False
125. Sieve Analysis is done for determination of Particle Size and its Distribution- Say True or False
Ans.: True
126. Expand the following abbreviations: (a) NABL (b) ISO
Ans:(a) NABL :National Accreditation Board for testing and Calibration Laboratories (b) ISO :
International Organization for Standardization
127. What is the full form of DSC
Ans. differential scanning calorimetry
128. TGA Stands for_______________
Ans. Thermogravimetric analysis
129. The expansion of HDT______________
Ans: Heat Deflection Temperature
130. What is full form of UTM?
a. Ans.: Universal Testing Machine
131. The expansion of ISO is ____________
i. Intelligence Standard Organization b) International Organization for Standardization
c) Integral Standard Organization d) Indian Standard Organization
b. Ans.: b) International Organization for Standardization
132. IEC stands for ____________.
a. Ans.: International Electrotechnical Commission
133. BIS stands for ________.
a. Ans.: Bureau Of India Standard
134. ASTM Stands for___________
a. Ans.: American Society for Testing Materials
135. CLTE Stands for______________
Ans.: Coefficient of Leaner Thermal Expansion (CLTE)
136. What is the expansion of PTFE polymer?
Ans.: Polytetrafluoroethylene
137. PS Stands for___________
Ans.:Polystyrene
138. Expand the abbreviation ‘PVDC’
Ans.: Polyvinylidene chloride
139. BOPP Stands for___________
Ans.: Biaxially Oriented Polypropylene
140. Write the full form of SAN?
Ans.: Styrene Acrylonitrile polymer
141. Write the full name of LLDPE?
Ans.: Linear low density polyethylene
142. UHMHDPE Stands for___________
Ans.: Ultra High Molecular Weight High Density Polyethylene
143. Tg Stands for___________
Ans.: Glass Transition Temperature
144. PVC Stands for___________
Ans.: Polyvinyl chloride
145. ABS Stands for___________
Ans.: Acrylonitrile butadiene styrene
146. PLA Stands for___________
Ans.:Polylactic Acid
147. HDPE Stands for___________
Ans.:High-density polyethylene
148. PVC Stands for___________
Ans.: Polyvinyl Chloride
149. PMMA Stands for___________
Ans.:Poly(methyl methacrylate)
150. VSP Stands for___________
Ans.: Vicat Softening Point
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