CENTRAL INSTITUTE OF PLASTICS ENGINEERING & TECHNOLOGY
Question Bank
2 MARK ---QUESTION
3 MARK --- QUESTION
4/5 MARK ----QUESTION
COURSE : DPT
SEMESTER : IV
SUBJECT : PLASTICS MATERIAL- II
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1. High temperature, high performance polymeric materials are called _______ polymers
a) Engineering b) Liquid crystal c) Specialty d) Commodity
Ans.: d) Specialty polymers
2. ____________ are known as self-reinforced polymers
Ans.: Liquid crystal polymers
3. Liquid crystal polymers are
a) Thermotropic b) Lyotropic c) Both a and b d) None of these
Ans.: c) Both a & b
4. LCPs are ____________in state.
a) Amorphous b) mesomorphous c) semicrystalline d) All of these
Ans.: b) mesomorphous
5. Liquid crystal polymers are __________ in nature.
a)isotropic b) nonisotropic c) anisotropic d) None of these
Ans.: c) anisotropic
6. Melting point of LCP is __________ .
Ans.: a) 275-430°C
7. Recommended Mold Temperature for PEEK is _______
a)90-130°C b) 200-220°C c) 100 -140°C d) 160-200°C
Ans.: d) 160-200°C
8. Full form of LCP?
Ans.:Liquid crystal polymers
9. Characteristics of PSU are
a)high strength and hardness b) very high dimensional stability
c) Stability at high temperatures d) all of the above
Ans.: d) all of the above
10. Injection molding (processing) temperature of PSU is _______
a)350 to 400°C b) 250 to 300°C c) 300 to 350°C d) 180-220°C
Ans.: a) 350 to 400°C
11. Recommended Mold Temperature for PSU is
a)80-130°C b) 120 -160°C c) 160 -190°C d) 190 -220°C
Ans.: b) 120 -160°C
12. Victrex is the trade name of ______
Ans.: PEEK
13. Expand the termPAEK.
Ans.: Poly aryl ether ketone
14. Astrel is the trade name of ______
Ans.: c) Polyarylethersulfone
15. Starting materials for PPS are _______ & _________
a)p-benzene, and sodium sulfide b) p-dichlorobenzene, and sodium sulfide
c) p-chlorobenzene, and sodium hydroxide d) p-chlorobenzene, and calcium sulfide
Ans.: b) p-dichlorobenzene, and sodium sulphide
16. In some high temperature, non-stick applications __________ can replace PTFE.
a)PMMA b) PES c) PEEK d) PPS
Ans.: d) PPS
17. Which one of the following has higher impact strength and better chemical resistance?
a)Polysulphones b) Polyethersulphones c) ABS d) None of the above
Ans.: b) Polyethersulphones
18. Trade name of PPO is
Ans.: Noryl
19. Tgof PPO is
a)100 °C b) 50 °C c) 210 °C d) 300 °C
Ans.: c) 210 °C
20. Polyimide is synthesized by the reaction between
a)Isopthalic acid and glycerol b) Diisocynate and diol
b) Diamine and dibasic acid d) Dianhydride and diamine
Ans.: d) Dianhydride and diamine
21. Advantage of using metallocene catalyst is to get
a)Broader molecular weight distribution b) narrow molecular weight distribution
c) High molecular weight polymer d) low molecular weight polymer
Ans.: b) narrow molecular weight distribution
22. Commercially available PPO is modified using
a) Glycerol b) ethylene glycol c) styrene d) acrylics
Ans.: c) styrene
23. Metallocene polymers have
a) Broader distribution b) Narrow distribution c) Higher melt viscosity d) Both b and c
Ans.: d) Both b) and c)
24. Which one of the following is used in microwave oven parts
a)Polystyrene b) HDPE c) PET d) Polysulphone
Ans.: d) polysulfone
25. Polyetherimides are amorphous in nature due to
a)Symmetric b) Asymmetric c) ether linkage d) None of the above
Ans.: b) Asymmetric
26. Which one of the following has lowest toxic gas emission and smoke emission
a)Polysulphone b) PPS c) PPO d)PEEK
Ans.: d) PEEK
27. Kapton is the trade name of
Ans.:Polyimide
28. Which one of the following is used as wire enamels
a)PEEK b) PET c) PPS d) Polyimide
Ans.: d) Polyimide
29. Polyimide has following disadvantage
a)Poor thermal stability b) Poor acid resistance c) Poor hydrolysis resistance d) All the above
Ans.: c) Poor hydrolysis resistance
30. Lyotropic liquid crystal transition occurs by__________.
Ans.: styrene
31. Which one of the following is notch sensitive
a)Polysulfone b) Polyolefins c) ABS d) Nylons
Ans.: a) Polysulfone
32. Which one of the following is used as wire enamels
a) PEEK b) PET c) PPS d) Polyimide
Ans.: d) Polyimide
33. Polyimide has following disadvantage
a)Poor thermal stability b) Poor acid resistance c) Poor hydrolysis resistance d) All the above
Ans.: c) Poor hydrolysis resistance
34. Which one of the following feature is predominant components of LCP
a)Meta-phenylene b) ortho-phenylene c) para-phenylene d) none of the above
Ans.: c) para-phenylene
35. Thermotropic liquid crystal transition occurs by
a)Solvent b) Temperature c) Cooling d) Freezing
Ans.: b) Temperature
36. Trimellitic anhydride is used to synthesize
a) Polyimide b) Polyamide-imide c) Polyether imide d) All the
Ans. b) Polyamide-imide
37. Polymer blend with improved interphase is called __________.
Ans.: d) Polymer alloy
38. Miscible polymer blend is associated with __________
a)Negative of free energy b) Positive of free energy c) Kinetic energy d) None of the above
Ans.: a) Negative of free energy
39. PP and nylon 6 form _______
a) Miscible blend b) Immiscible blend c) LCP d)Compatibilized blend
Ans.: b) Immiscible blend
40. Polymer alloy is an _________blend having modified interface and/or morphology
a) Miscible blend b) Immiscible blendc) LCP d) compatibilised blend
Ans.: b) Immiscible blend
41. Reason for blending POM with PE is
a) To improve abrasion resistanceb) To improve barrier property
c) To decrease rigidity d) All the above
Ans.: a) To improve abrasion resistance
42. Reason for blending TPU with POM is
a) To increase the modulus b) To increase the tensile strength
c) To increase the toughness d) All the above
Ans.: c) To increase the toughness
43. Polymer blending can be done by_______________
a)Mechanical mixing b) Latex blending c) Fine powder mixing d) All of the above
Ans.: d) All of the above
44. LLDPE and LDPE form
a) Immiscible blend b) Miscible blend c) LCP d) none of the above
Ans.: a) immiscible blend
45. Compatibilizers are used to modify the interphase
a) To cure the resin b) To modify the interphase
c) To initiate the polymerization d) None of the above
Ans.: b) To modify the interphase
46. Reason for blending ABS with PVC is
a) To improve Tgb) To improve processability c) To improve toughness d) all the above
Ans.: d) all the above
47. NBR in PVC/NBR blend acts as
a) Curing agent b) lubricant c) plasticizer d) thinner
Ans.: c) plasticizer
48. Reason for blending polyamide with polyethylene is
a) To decrease the barrier property b) To increase the barrier property
c) To decrease the moisture absorption c) All the above
Ans.: b)To increase the barrier property
49. Reason for blending EPDM with PP is
a) To increase the barrier property b) To decrease the barrier property
c) To increase the low temperature impact strengthd) To increase the modulus
Ans.: c) To increase the low temperature impact strength
50. Full form of EPDM is
Ans. Ethylene propylene diene monomer
51. Blending PVC with acrylics to get
a) To increase the flame resistance b) To increase the modulus
c) To increase the abrasion resistance d) To increase the rigidity
Ans.: a) To increase the flame resistance
52. Mindel is the blend of ____________
Ans.: Polysulphone/ABS
53. PC/ABS is an ____________
Ans.: Alloy
54. Laminate is a product made by bonding together two or more layers of material(s). (Say True or
False)
Ans.: True
55. Usually stronger constituent of a composite is __________.
Ans.: (b) Reinforcement
56. The primary purpose of the matrix is to____.
(a) Act as a binder (b) Control the physical shape and dimensions
(c) Transfer the applied load (d) Protect the reinforcement.
Ans.: (c) Transfer the applied load
57. The acronym PMC stands for:
Ans.: Polymer Matrix Composite
58. The acronym CMC stands for:
Ans.: Ceramic Matrix Composite
59. The acronym CMC stands for:
Ans.: Ceramic Matrix Composite
60. Composite materials are__________
(a) Isotropic but not homogeneous (b) Homogeneous but not isotropic
(c) Both Homogeneous and Isotropic (d) Neither homogeneous nor isotropic
Ans.: (d) Neither homogeneous nor isotropic
61. Aramid fibers are made up of the following elements_____________
(a) Carbon, Hydrogen, and Oxygen (b) Carbon, Hydrogen, Oxygen and Nitrogen
(c) Carbon, Hydrogen, and Nitrogen (d) Hydrogen, Oxygen and Nitrogen.
Ans.: (b) Carbon, Hydrogen, Oxygen and Nitrogen
62. Composites which do not have the same mechanical or physical property in all directions are
saidto be ___________
Ans.: (d) Anisotropic
63. Expand DMC.
Ans.: Dough Molding Compound
64. Which of the following is not an example of an organic fiber?
(a) Polyester (b) Glass (c) Nylon (d) Aramid
Ans.: (b) Glass
65. For high temperature applications, which of the following matrix material is preferred?
(a) Vinyl ester (b) PF (c) Epoxy resins(d) Unsaturated polyester
Ans.: (c) epoxy resins
66. Roving consists of_________
(a) untwisted filaments (b) chopped filaments
(c) long and narrow bundles of fibres (d) None of the above
Ans.: (c) long and narrow bundles of fibres
67. Out of the following, which polymer has the highest service temperature?
(a) Phenolic (b) Epoxy (c) Polyester (d) Polyimide
Ans.: (d) Polyimide
68. Yarn consists of ________
(a) untwisted filaments (b) twisted bundles of fibres
(c) long and narrow bundles of fibres (d) None of the above
Ans.: (b) long continuous length of interlocked fibres
69. Amongst the choices given below, high performance applications in the aerospace industry use
(a) Kelvar 49 (b) Kelvar 29 (c) Kevlar (d) None of the above
Ans.: (a) Kelvar 49
70. The first man-made fibre is _____.
Ans.: Rayon
71. A synthetic fibre which works like wool is _______
(a) Nylon (b) Polyester (c) Acrylic (d) PVC
Ans.: (c) Acrylic
72. Kevlar is the commercial name of Aramid fibers(say true or False)
Ans.: True
73. Reinforcement imparts___________ to the polymeric material.
(a) Strength (b) Shape (c) Both (a) & (b) (d) None of the above
Ans.: (a)Strength
74. The stronger constituent of a composite is ___________
(a) Matrix (b) Reinforcement (c) Both are of equal strength (d) Can’t define
Ans.: (b) Reinforcement
75. Composite manufacturing methods are _______.
(a) Fast & Cheap (b) Slow & Costly (c) Fast but costly (d) None of the above
Ans.: (b) Slow & Costly
76. A typical range of carbon content in carbon fiber is ___________
(a) 93-95% (b) 92-95% (c) 93-94% (d) 90-95%
Ans.: (a) 93-95%
77. The most common fiber shape is not circular. (say true or False)
Ans.: False
78. Longitudinal strength of fiber reinforced composite is mainly influenced by ______.
(a) Fiber strength (b) Fiber orientation (c) Fiber volume fraction (d) Fiber length
Ans.: (a) Fiber strength
79. Impact modifiers are also known astoughening agents.(say True or False)
Ans.: True
80. Nanocomposites consist of particles or fibers that are of at most this dimension or less?
(a) 0.0000001 m (b) 0.000001 m (c) 0.00001 m (d) 0.0001 m
Ans.: (a) 0.0000001 m
81. Adhesive bonding of composite parts may require ___________.
(a) Elevated temperatures during curing (b) Refrigeration while setting
(c) Vacuum chambers (d) Additional Mechanical fastening.
Ans.: (a) Elevated temperatures during curing
82. _______ of adhesive means the time from the date manufacture to the termination of life of
adhesive due to its deterioration by ageing process.
Ans.: (b) Shelf life
83. Which of the following products are typically made by hand lay-up method:
(a) fishing poles (b) boat hulls (c) bath tubs (d) Both (b) & (c)
Ans.: (d) Both (b) & (c)
84. The ________ process was developed for making a variety of components, includingrelatively
largeparts with complex shapes.
(a) Hand Lay-up (b) Spray–up (c) Vacuum bag (d) None of these
Ans.: (c) Vacuum bag
85. The advantage of using an open mold is which one of the following:
(a) Higher production rates (b) Smoother surfaces are achieved on both sides
(c) Interior of the mold is accessible (d) The mold costs much less than if two matchingmolds were
used.
Ans.: (d) the mold costs much less than if two matching molds were used.
86. An apparatus that provides control over both temperature and pressure and is used to copolymer
matrix composites is called which one of the following:
(a) Autoclave (b) curing furnace (c) curing oven (d) pressure cooker
Ans.: (a) Autoclave
87. Wood an example for laminar composite.(say True or False)
Ans.: False
88. Fibers impregnated with partially cured TS resins to facilitate shape processing are called
____
(a) Preforms (b) Prepegs(c) Mats (d) None of these
Ans.: (b) Prepegs
89. Which of the following molding processes is most labor-intensive?
(a) Hand Lay-up process (b) Spray–up Process (c) Vacuum bag process (d) None of these
Ans.: (a) Hand Lay-up processes
90. A molding operation that uses sheet-molding compound is a form of which one of thefollowing:
(a) compression molding (b) contact molding (c) injection molding (d) open moldprocessing
Ans.: (a) Compression molding
91. In ___________ process, the Resin-impregnated continuous fibers are wrapped around
Rotatingmandrel that has the internal shape of the desired FRP product; the resin is then cured
and themandrel removed.
Ans.: (c) Filament winding
92. The special tooling in filament winding that determines the shape of the filament-wound partis
calledwhich one of the following:
(a)collet (b) core (c) fixture (d) mandrel
Ans.: (d) mandrel
93. Pultrusion is most similar to which one of the following plastic shaping processes:
(a) Blow molding (b) Extrusion (c) Injection molding (d) Thermoforming
Ans.: (b) Extrusion
94. The mechanical properties of the composites are significantly increased with the use of
Reinforcementmaterials that consists of:
(a) Finely ground particles (b) Long oriented fibers
(c) Random chopped fiberglass (d) Graphite flakes.
Ans.: (b) Long oriented fibers
95. Which of the following is a closed mold process
(a) Hand lay-up (b) Spray-up (c) Contact molding (d) Pressure Bag
Ans.: (d) Pressure Bag
96. The first coating typically applied to the mold surface prior to beginning a manual lay- up
iscalled_____.
Ans.: Release agent
97. _______ fiber reinforced composites have higher strength than short fiber reinforcedcomposites.
(a) Long (b) Chopped (c) Long and chopped (d) none of the above
Ans.: (a) Long
98. The most widely used composites are:
(a) Bismaleimides(b) Fiber-reinforced thermoplastic polymers
(c) Fiber-reinforced thermosetting polymers (d) Phenolics.
Ans.: (c) Fiber-reinforced thermosetting polymers
99. The acronym SMC stands for_______.
Ans.: Sheet Molding Compound
100. In the automotive industry where short production runs are necessary, polymer
matrixCompositesare manufactured by the process called _____________.
(a) Filament Winding (b) Autoclave Forming (c) Resin Transfer Molding (d) None of the above.
Ans.: (c) Resin Transfer Molding
101. Composites are ___________materials.
(a) Heterogeneous (b) Homogeneous (c) Polymer materials (d) Ceramic materials
Ans.: (a) Heterogeneous
102. Tennis racquets are made from____________ composites.
Ans.: Carbon fiber reinforced
103. Most widely used form of FRP is ____________ Structure?
Ans.: Laminar
104. Inter-ply hybrid composites consists of____________.
(a) Two or more different composite systems (b) Two or more different fibers used in the samePly
(c) Both a and b (d) None of the above
Ans.: (a) Two or more different composite systems
105. The strongest fibre among the following is __________.
(a) Rayon (b) Nylon (c) Acrylic (d) Polyester
Ans.: (b) Nylon
106. Which of the following prepregs is used in printed circuit board?
(a) Epoxy (b) Phenolic (c) Unsaturated Polyester (d) MF
Ans.: (a) Epoxy
107. Which of the following plastic is widely used in DMC?
(a) Epoxy (b) UF (c) Unsaturated Polyester (d) PF
Ans.: (c) Unsaturated Polyester
108. Which of the following is a continuous process?
(a) Hand lay-up (b) Spray-up (c) Pultrusion (d) Compression molding
Ans.: (c) Pultrusion
109. Bullet resistant vests mainly use the following fiber.
(a) Boron (b) Glass (c) Graphite (d) Kevlar
Ans.: (d) Kevlar
110. 181- Expand RRIM
Ans.: (b) Reinforced Reaction Injection Molding
111. Which of the following composites are replacing metals in golf club shafts?
(a) Carbon-Carbon (b) Graphite/Epoxy (c) Boron/Epoxy (d) All the above
Ans.: (b) Graphite/Epoxy
112. Helmets are made up of which of the following process:
(a) Pressure bag molding (b) Vacuum bag molding
(c) Autoclave molding (d) Resin Transfer molding
Ans.: (a) Pressure bag molding
113. Angled products, channels, beams, tubing and solid rods are made by __________
(a) Hand lay-up (b) Spray-up (c) Pultrusion (d) Vacuum Bagging
Ans.: (c) Pultrusion
114. Fishing rods are made up of___________ fibre reinforced epoxy.
(a) Glass (b) Carbon (c) Kevlar (d) Both (a) and (b)
Ans.: (d) Both (a) and (b)
115. Which additives is used as a impact modifier
(a) MBS (b) filler (c) Lubricant(d) all
Ans. (a) MBS
116. Plasticizers are added to plastics to
(a) Increase flexibility (b) Reduce melt temperature (c) lower viscosity (d) all of the above
Ans. d. all of the above
117. Most common antistatic agent are
(a)Benzotriazole(b) quaternary ammonium compounds
(c) Phthalate (d) Paraffinwaxes
Ans. (b) quaternary ammonium compounds
118. The filler is used to plastics materials to
(a) Reduce the cost (b) Increase the cost
(c) Both of the above (d) None of these
Ans. (a) Reduce the cost
119. Which additives is used to modify the surface properties
(a) slip additives (b) lubricant (c) Filler (d) stabilizer
Ans. (a) slip additives
120. Which additives is used to modify the optical property
(a) Nucleating agent (b) lubricant (c) Filler (d) stabilizer
Ans. (a) Nucleating agent
121. Synergism effect denoted by
(a)>(x+y) (b)<(x+y) (c) (x+y) (d) all
Ans. (a)>(x+y)
122. Mixed fed extruder are usually fed by
(a) Gravity (b) linear (c) Angular (d) all
Ans. (a)Gravity
123. Cold fed extruder is a one type of
(a) Single screw extruder (b) Twin screw extruder (c) a&b (d) None of these
Ans. (a) Single screw extruder
124. Banbury mixer is also called
(a) Kneader Mixer (b) External Mixer (c) a & b (d) None of these
Ans. (a) Kneader Mixer
125. High speed mixer is not used for
(a)Viscous material (b)dry material (c) lump (d) None of these
Ans. (a) viscous material
126. UV stabilizers to absorb the radiation energy in the range of 290 to 400 nm.
(say true or false).
Ans. True
127. Blowing agents are used to prepare the cellular plastics.(say True or False)
Ans. True
128. After mixing the mixture should have Homogenous phase.(say True or False)
Ans. True
129. Compounding is used for R&D Purpose .(say True or False)
Ans. True
130. ________________.is an example of UV absorber.
Ans. 2-hydroxy benzophenones
131. ______________ .agent is a substance which is capable of producing a cellular structure.
Ans. Blowing
132. Toughening agent improves the impact strength of plastics.(say True or False)
Ans. True
133. ______________ are used to improve the wettability and interfacial adhesion offillers.
Ans. Coupling Agents
134. To reduce accumulation of dust on plastics parts _______________ are used.
(a)Pigments (b) Anti-static agents (c) Fillers (d) None of these
Ans.(b) Anti-static agents
135. Cored rotors in Banbury mixer are used for circulation of cooling water or steam.(say True or
False)
Ans. True
136. Full form of HALS is ________________________________
Ans. Hindered Amine Light Stabilizer
137. ______________ is used to reduce the degradation of polymer caused byfrictional heating.
Ans. Internal Lubricant Course
138. The synergistic effect is also be increased by the use of halogens and bromide compounds.(say
True or False)
Ans. True
139. The antioxidants are substances that inhibit ……………at normal or elevatedtemperatures.
Ans. Oxidative degradation
140. ________________.is an example of UV absorber.
Ans. 2-hydroxy benzophenones
141. ______________ .agent is a substance which is capable of producing a cellular structure.
Ans. Blowing
142. Toughening agent improves the impact strength of plastics.(say True or False)
Ans. True
143. Di-octyl phthalate (DOP) are used as an impact modifier .(say True or False)
Ans. False
144. Filler reduce the cost as well as improve the _______________
Ans. Bulk Properties
145. Compatabilizer is used to reduce the _______________
Ans. Interfacial adhesion
146. Hindered amine light stabilizers provide superior long term colour stability to the
Plastics.(say True or False)
Ans. True
147. Pigment are insoluble in the plastics and hence the induce opacity.(say True or False)
Ans. True
148. Addition of plasticizer increases the glass transition temperature of PVC.(say True or False)
Ans. False
149. Carbon black in PE acts as UV Absorber and protect the PE from photodegradation
Ans. True
150. Reinforcements are added to plastics to increase the strength and _________of plastics.
Ans. Stability
151. Surface resistivity of plastics will be increased by the use of_____________
Ans. Antistatic Agent
152. High speed mixer is used for melt blending of Rigid Plastics. (say True or False)
Ans. True
153. External lubricants are largely insoluble in PVC.(say True or False)
Ans. True
154. Additives Change the properties of Plastic materials .(say True or False)
Ans. True
155. Flame retardant use as a property extender.(say True or False)
Ans. True
156. Antioxidant use as a Property Extender.(say True or False)
Ans. True
157. Diluent is used to reduce the formulation cost .(say True or False)
Ans. True
158. Nucleating agent is used to modify the optical property .(say True or False)
Ans. True
159. __________________ is used to modify the surface modification.
Ans. Anti-static agents
160. Oxidation occurs in the polymer during Manufacturing .(say True or False)
Ans. True
161. One side effect of lower cost plasticizer in PVC is their __________________
Ans. Thermal Stability
162. Transverse Tensile strength of glass fibre will improve by adding coupling agent .(say True or
False)
Ans. True
163. Carbon black is a conductive additive .(say True or False)
Ans. True
164. Antioxidant is used for PA and PET Recycling .(say True or False)
Ans. True
165. The thermoplastic mixer discharged from the Internal Mixer is usually in the form of lump.(say
True or False)
Ans. True
166. Thermoplastic material such as ABS, PS, etc. could be very well utilized for compounding .(say
True or False)
Ans. True
167. High speed mixer is used for dry blending of PVC.(say True or False)
True
168. The efficiency of the mixing action of the single screw extruder depends betweenthe wall of the
barrel and the material than between the materials and the screwsurface .(say True or False)
Ans. True
169. Organomodified siloxanes can be used as ______________________
Ans. Surface and Bulk modifying agents
170. A widely used mold releasing agent
(a) Silicon (b) Talc (c) Clay (d) all
Ans. (a)Silicon
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