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.Management Sciences
Category: Polymer Technology
Flexible plastic pipes are made of___________________?
A. High density polyethylene (HDPE)
B. Low density polyethylene (LDPE)
C. Polypropylene
D. Unsaturated polyester
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
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