ELECTRICAL MACHINES QUIZ

Plexiglass (also called lucite) because of its high optical transparency is used for making lenses. It is chemically

Phenolic resins

Polymethyl methacrylate (PMMA)

Polycarbonates

Polytetraflouroethylene(PTFE)

TRUE ANSWER : ?
YOUR ANSWER : ?

Polyhexamethylene adipimide is also known as

Nylon-66

Bakelite

Epoxy resin

Silicone rubber

TRUE ANSWER : ?
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Cellulose content in bomboo fibre is about __________ percent.

85

50

20

10

TRUE ANSWER : ?
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__________ tubes are good substitude for human blood vessels onrheart by-pass operation.

Polystyrene

PVC

Polythene

Teflon/dacron

TRUE ANSWER : ?
YOUR ANSWER : ?

Dacron is a/an

Polyamide

Unsaturated polyester

Inorganic polymer

Polyester

TRUE ANSWER : ?
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Melamine formaldehyde resin which has a very high anti tacking properties, is not used for the

Tanning of leather

Decorative laminates

Electrical insulation purpose

Strengthening of plaster of paris

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Styrene butadiene rubber (SBR) is never used for making

Gaskets

Front wheel tyres of aeroplanes (i.e., heavy duty tyres)

Soles of shoes

Coated fabrics

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Elastomers are

Thermosetting material

Having very high tensile strength and heat resistance

Having high flexural strength

Exemplified by protein derivatives

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Cross linked polymers formed from bi-and trifuctional groups in which cross-linkage in three dimensions via few chemical bonding across linear chains occur imparts to the polymer __________ properties.

Elastometric

Brittleness

Thermoplastic

Thermosetting

TRUE ANSWER : ?
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Condensation polymerisation of caprolac-tum is carried out in the reactor maintained at a temperature of __________ °C for producing nylon-6.

250-280

-20 to 25

50 to 75

100 to 150

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YOUR ANSWER : ?

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