Neoprene is the trade name of________________?

A. Polyurethane
B. Phenol formaldehyde
C. Polychlorophrene
D. Styrene butadiene rubber (SBR)

Buna-S is also known as_________________?

A. Teflon
B. PTFE
C. SBR
D. Polycrylates

_______________ is a natural fiber?

A. Cellulose
B. Dacron
C. Nylon-6
D. None of these

Tyres are made by___________________?

A. Injection moulding
B. Extrusion
C. Rotational moulding
D. Compression moulding

Glyptal used in the manufacture of paints & lacquers is a _____________ polymer?

A. Polyamide
B. Polystyrene
C. Polyester
D. Polyacrylonitrile

Main constituent of natural rubber is_________________?

A. Polystyrene
B. Polyisoprene
C. Polybutadiene
D. Poly chloroprene

Out of all the elastomers, natural rubber has the longest elongation range & flexibility of the order of _______________ percent?

A. 1-1000
B. 1000-1500
C. 1500-2000
D. 2000-2500

Polycaprolactam is nothing but __________________?

A. Orlon
B. Nylon-66
C. Nylon-6
D. Saran

_____________ is not a polyester fiber?

A. Terylene
B. Dacron
C. Nylon
D. Polyacrylonitrile

Density of high density polythene is about __________ gm/c.c ?

A. 1.18
B. 1.05
C. 0.95
D. 0.99