This set of Polymer Engineering Questions and Answers for Experienced people focuses on “Identification of Common Plastics and Rubbers-2”. 1. What colour change is observed when few drops of alcoholic NaOH is added to polyvinyl chloride solution? a) colourless to red b) colourless to yellow c) colourless to blue d) colourless to grey 2. Which … Read more
This set of Polymer Engineering Multiple Choice Questions & Answers (MCQs) focuses on “Identification of Common Plastics and Rubbers-1”. 1. A rubber polymer sample A is reacted with chromic acid solution and yields acetic acid solution. Compound A also gives positive Weber test. Which of the following is possibly A? a) 1,4-polyisoprenes b) butyl rubber … Read more
This set of Polymer Engineering Interview Questions and Answers for Experienced people focuses on “Synthetic Rubber-II”. 1. Which of the following resistances is provided by the presence of chlorine in CR molecules? a) resistance to flex cracking b) ozone resistance c) flame resistance d) resistance to oxidative aging 2. Which one of the following conditions … Read more
This set of Polymer Engineering Multiple Choice Questions & Answers (MCQs) focuses on “Synthetic Rubber”. 1. Which synthetic rubber is also commonly known as hypalon? a) polychloroprene rubber b) chloro-sulphonated polyethylene c) styrene-butadiene rubber d) nitrile rubber 2. What kind of synthetic rubbers are commonly known as thiokols? a) polyurethane rubbers b) polysulphide rubbers c) … Read more
This set of Polymer Engineering Multiple Choice Questions & Answers (MCQs) focuses on “Natural Rubber”. 1. Which tree gives out the latex to obtain natural rubber? a) eucalyptus b) hevea brasiliensis c) anogeissus d) astragalus 2. Which substance is added to the dilute latex to prevent darkening of latex? a) sodium bisulfite b) potassium sulfite … Read more
This set of Polymer Engineering Questions and Answers for Entrance exams focuses on “Additives for Plastics”. 1. Which of the following type of fillers are treated with chemicals to improve its attachment with polymers? a) particulate fillers b) rubbery fillers c) mineral fillers d) fibrous fillers 2. Which of the following additives are used in … Read more
This set of Polymer Engineering Multiple Choice Questions & Answers (MCQs) focuses on “Other Plastic Materials”. 1. Which of the following monomer molecule does cumarone and indene resemble to? a) ethylene b) styrene c) butadiene d) cumene 2. Which catalyst is used in the resinification reaction of cumarone and indene? a) nitric acid b) sulphuric … Read more
This set of Polymer Engineering Multiple Choice Questions & Answers (MCQs) focuses on “Amino Resins”. 1. Which of the following is not a characteristic of a cured urea resin? a) hard and rigid b) non-inflammable c) excellent electrical insulation d) impart colour and odour to food & drinks 2. Which of the following is used … Read more
This set of Basic Polymer Engineering Questions and Answers focuses on “Phenolic Resins”. 1. How many methylol groups are present in a typical novolac molecule? a) 3-5 b) 6-8 c) 0 d) 2 2. If the resinification reaction is stopped at early stages, a low molecular weight product A, having 3-4 aromatic rings and 3-5 … Read more
This set of Polymer Engineering Multiple Choice Questions & Answers (MCQs) focuses on “Cellulose Plastics”. 1. Which of the following area of application restricts the use of cellulose nitrate? a) photographic films b) lacquor coatings c) tool handles d) printing inks 2. What is the role of H2SO4 in the preparation of cellulose nitrate? a) … Read more
