Polymer Technology

181. Rain coats are made of

1. Neoprene
2. PVC
3. Polyurethane
4. SBR

View answer

182. Rayon is a _________ fibre.

1. Cellulosic
2. Polyamide
3. Polyester
4. Natural

View answer

183. Rayon is superior to cotton in making gauge for wound treatment, because rayon

1. Is a synthetic polymer
2. Does not stick to the wound unlike cotton
3. Can absorb over 90% of its own weight of water
4. Both (B) and (C)

View answer

184. Reaction of dimethyl terephthalate (DMT) and ethylene glycol produces

1. Nylon-6
2. Dacron
3. Polyester
4. PVC

View answer

185. Rexine (also called artificial leather), which is used for making table cover, automobile seat cover, shoes etc. is made by coating thick cloth with molten

1. Teflon
2. Bakelite
3. SBR
4. PVC

View answer

186. Zeigler process

1. Produces high density polythene
2. Uses no catalyst
3. Produces low density polythene
4. Employs very high pressure

View answer

187. Scouring is a finishing operation during the manufacture of fibre, which aims at _________ of fibres.

1. Improving the stretchability
2. Dyeing/colouring
3. Detergent solution washing
4. Glycol soaking

View answer

188. Silicone is a/an

1. Monomer
2. Inorganic polymer
3. Thermoplastic material
4. A natural polymer

View answer

189. Silicone resins, which are highly water repellent and has good heat resistance cannot be used

1. As room temperature adhesive
2. As grease & lubricant
3. Hydraulic fluid for heat transfer
4. Resin for lamination

View answer

190. Size range of polymer molecules varies from _________ metre.

1. 10^-2 to 10^-5
2. 10^-4 to 10^-7
3. 10^-1 to 10^-2
4. 10^-8 to 10^-10

View answer