A. Butyl rubber
B. Silicon rubber
C. Nitrile rubber
D. Silicone rubber
Related Mcqs:
- 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 - Size range of polymer molecules varies from __________ meter?
A. 10-2 to 10-5
B. 10-4 to 10-7
C. 10-1 to 10-2
D. 10-8 to 10-10 - Molecular weight of polymers are in the range of__________________?
A. 10 to 103
B. 102-107
C. 107-109
D. 109-1011 - Plasticisers are high boiling liquids added to plastic polymers to impart toughness and flexibility at ordinary temperature. Which of the following is not a plasticiser ?
A. Ethylene glycol
B. Stearic acid estors
C. Tricresyl phosphate
D. Esters of phthalic acid - Polystyrene is a ____________ plastic at room temperature?
A. Ductile
B. Brittle
C. Malleable
D. None of these - 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 - 90% of the caprolactam is converted to nylon-6 on its condensation polymerisation in the reactor maintained at a temperature of _____________ °C?
A. -5
B. 10-30
C. 250-280
D. 500-600 - Melt spinning of polymers involves the forcing of polymer melt through spinnerates (fine holes) into an atmosphere kept at a temperature lower than the melting point of the polymer, which causes the fine diameter polymer melt to harden into filaments. Melt spinning is not used in case of the _____________ fibres?
A. Acrylic
B. Polyester
C. Nylon 6:6
D. Polypropylene - Most of the plastics are safe to be used upto a maximum temperature of ______________ °C?
A. 100
B. 150
C. 350
D. 450 - Temperature maintained in the emulsion polymerisation reactor for PVC manufacture is about ______________ ° C?
A. -20
B. 50
C. 250
D. 500
