Which of the following is not an elastomer ?
Which of the following is not an elastomer ?
A. Polyisoprene
B. Neoprene
C. Nitrile-butadiene
D. None of these
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Nylon-66 compared to nylon-6 has __________________?
Nylon-66 compared to nylon-6 has __________________?A. Lower melting point
B. More abrasion resistant properties
C. Higher hardness
D. All A., B. and C.Zeigler process________________?
Zeigler process________________?A. Produces high density polythene
B. Uses no catalyst
C. Produces low density polythene
D. Employs very high pressurePolycondensation of saturated dicarboxylic acid with polyhydric alcohol produces________________?
Polycondensation of saturated dicarboxylic acid with polyhydric alcohol produces________________?A. Epoxy resin
B. Polyamide
C. Alkyd resin
D. Phenolic resinAll thermoplastic, thermosetting & elastic materials can be processed in a extrusion machine, however it cannot be used for the production of plastic_______________?
All thermoplastic, thermosetting & elastic materials can be processed in a extrusion machine, however it cannot be used for the production of plastic_______________?A. Filaments
B. Pipes
C. Buckets
D. TubingsRayon is superior to cotton in making gauge for wound treatment, because rayon_____________________?
Rayon is superior to cotton in making gauge for wound treatment, because rayon_____________________?A. Is a synthetic polymer
B. Does not stick to the wound unlike cotton
C. Can absorb over 90% of its own weight of water
D. Both B. and C.Silicone resins, which are highly water repellent and has good heat resistance cannot be used___________________?
Silicone resins, which are highly water repellent and has good heat resistance cannot be used___________________?A. As room temperature adhesive
B. As grease & lubricant
C. Hydraulic fluid for heat transfer
D. Resin for lamination