Chemical Engineering MCQs

Page No. 341

The monomer of poly vinyl chloride (PVC) is__________________?


aChloroethane

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bEthylene dichloride

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cEthyl chloride

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dChloroform

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View Answer Chloroethane

In nylon-66, the first and second numbers (i.e., 6) respectively designate the number of carbon atoms present in the_________________?


aHexamethylene diamine and the ring

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bHexamethylene diamine and the adipic acid

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cAdipic acid and the ring

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dNone of these

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_____________ is not a polyester fiber?


aTerylene

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bDacron

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cNylon

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dPolyacrylonitrile

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View Answer Nylon

Neoprene is rendered non-inflammable, because of_____________________?


aIts cross-linked structure

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bIts linear chain structure

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cThe presence of chlorine atoms in its monomer

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dThe absence of chlorine atoms in its monomer

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Thermosetting polymers as compared to thermoplastic polymers_____________________?


aAre formed by addition polymerisation

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bHave three dimensional structure

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cHave linear structure

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dNone of these

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Alkyd resin e.g., glyptal resin formed by Phthalic anhydride and glycerine is not used_______________?


aFor surface coating of automobiles & air crafts

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bFor fibre making

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cAs plasticiser for PVC & nitrocellulose

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dFor film forming materials

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View Answer For fibre making

Orion is_________________?


aA copolymer

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bA condensation polymer

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cObtained by polymerising vinyl cyanide

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dAll A., B. and C.

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Temperature and gage pressure maintained during the manufacture of cold SBR (styrene butadiene rubber) are__________________?


a5°C and 1 kgf/cm2

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b– 20°C and 1 kgf/cm2

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c0°C and 1 kgf/cm2

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d0°C and 3 kgf/cm2

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View Answer 5°C and 1 kgf/cm2

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 ?


aPhosphorous

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bCarbon black

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cPine oil

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dRosin

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View Answer Carbon black

Vulcanisation of rubber decreases its__________________?


aTensile strength

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bResistance to organic solvents

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cTackiness

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dWorking temperature range

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View Answer Tackiness

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