Rain coats are made of__________________?
Rain coats are made of__________________?
A. Neoprene
B. PVC
C. Polyurethane
D. SBR
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Thermoplastic resins usually____________________?
Thermoplastic resins usually____________________?A. Remain hard as long as they are hot
B. Cannot be reclaimed from waste
C. Permanent setting resins
D. Less brittle than thermosetting resinsProperties of a polymer is affected by the____________________?
Properties of a polymer is affected by the____________________?A. Chain length
B. Intermolecular forces
C. Both A. and B.
D. None of theseAlkyd resin is a/an___________________?
Alkyd resin is a/an___________________?A. Polyamide
B. Polyester
C. Polyolefin
D. Addition polymerIdentify the group in which all the polymers mentioned can be used to make fibres ?
Identify the group in which all the polymers mentioned can be used to make fibres ?A. Butadiene copolymers, Polyamides, Urea-formaldehyde
B. Cellulose derivatives, Polyisoprene, Polyethylene
C. Cellulose derivatives, Polyamides, Polyurethane
D. Polypropylene, Poly vinyl chloride, SiliconFlexible foam (for mattresses) are usually made of _________________?
Flexible foam (for mattresses) are usually made of _________________?A. PVC
B. Silicone rubber
C. Polyurethanes
D. PolyamidesTemperature and gage pressure maintained during the manufacture of hot SBR (styrene butadiene rubber) are____________________?
Temperature and gage pressure maintained during the manufacture of hot SBR (styrene butadiene rubber) are____________________?A. 50°C and 3 – 4 kg/cm2
B. 50°C and 1 kgf/cm2
C. 250°C and 10 kgf/cm2
D. 250°C and 1 kgf/cm2