Multiple Choice Questions on Polymer Technology
1- Which of the following polymerizing techniques is extensively employed for the polymerization of isoprene?
(A). Bulk polymerization
(B). Solution polymerization
(C). Emulsion polymerization
(D). Suspension polymerization
2- What is the functionality of Vinyl Chloride?
(A). One
(B). Two
(C). Three
(D). Four
3- The size of a fiber is expressed in terms ____________
(A). Denier
(B). Tenacity
(C). CRIMP
(D). All of the above
4- Who is known as the “Father of Modern Polymer Science”?
(A). Hermann Staudinger
(B). Leo Baekeland
(C). Charles Goodyear
(D). W.H. Carothers
5- The polymerization technique employed for the polymerization of water-insoluble monomers
(A). Emulsion Polymerisation
(B). Bulk Polymerisation
(C). Solution Polymerisation
(D). Suspension Polymerisation
6- Which of the following is used as blowing agents in rubber compounds?
(i) Sodium bicarbonate (ii) Ammonium bicarbonate (iii) DNPT (di-nitroso pentamethylene tetramine) (iv) Titanium dioxide
(A). only (i) and (ii)
(B). only (ii) and (iv)
(C). only (i), (ii), and (iii)
(D). All of the above
7- An example of a yield stimulant for natural rubber latex is
(A). ammonia
(B). 2-chloroethane phosphonic acid
(C). Sodium sulfite
(D). formaldehyde
8- Among the following which one is not a method for concentrating natural rubber latex?
(A). centrifugation
(B). creaming
(C). evaporation
(D). coagulation
9- __________ helps to prevent natural coagulation and allows the latex to remain in its liquid state for a long time.
(A). Ammonia solution
(B). Sulphuric acid
(C). Formic acid
(D). Tamarind seed powder solution
10- Among the following which is not a marketable form of natural rubber?
(A). Ribbed sheets
(B). Latex concentrate
(C). Field coagulum
(D). Crepe rubber
11- Which chemical is not used for low-ammonia preservative systems?
(A). Tetramethyl thiuram disulfide
(B). Zinc oxide
(C). Stearic acid
(D). Lauric acid
12- The rubber which is not vulcanized by sulfur is _________
(A). Neoprene
(B). Nitrile rubber
(C). SBR
(D). Natural rubber
ANSWERS:
1-(B), 2-(B), 3-(A), 4-(A), 5-(D), 6-(C), 7-(B). 8-(D), 9-(A), 10-(C), 11-(C), 12-(A)