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.Management Sciences
Category: Polymer Technology
Orion is_________________?
A. A copolymer
B. A condensation polymer
C. Obtained by polymerising vinyl cyanide
D. All A., B. and C.
The synthetic fibres produced from _____________ are known as rayon?
A. Lignin
B. Cellulose
C. Polyamides
D. Ethylene glycol
Vulcanisation of rubber_____________________?
A. Decreases its tensile strength
B. Increases its ozone & oxygen reactivity
C. Increases its oil & solvent resistance
D. Converts its plasticity into elasticity
The process involved in converting rubber into a thin sheet or coating it on fabric is called__________________?
A. Extrusion
B. Mastication
C. Calendaring
D. Vulcanisation
Vulcanisation of rubber decreases its__________________?
A. Tensile strength
B. Resistance to organic solvents
C. Tackiness
D. Working temperature range
Which of the following is the most important rubber compounding ingredient which is used to improve wearing qualities of both natural rubber & SBR by imparting toughness ?
A. Phosphorous
B. Carbon black
C. Pine oil
D. Rosin
Which of the following is stretched into fibers ?
A. Saturated polyester
B. Unsaturated polyester
C. Isoprene
D. Bakelite
Addition of stabiliser during PVC manufacture is done to________________?
A. Improve its impact strength
B. Improve its elasticity
C. Reduce the melt viscosity & glass transition temperature
D. Prevent its thermal degradation
Due to its excellent permeability to air/gas and oxidation resistance, the tubes of automobile tyres is made of________________?
A. Cold SBR
B. Butyl rubber
C. Bunai N
D. Buna S
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