chemical engineering Mcqs
5451. Styrene butadiene rubber (SBR) is never used for making__________________?
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A. Coated fabrics

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

C. Gaskets

D. Soles of shoes

5452. Plastic tubes & pipes are generally made by ______________ moulding?
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A. Compression

B. Injection

C. Transfer

D. Extrusion
5453. Polymethyl methacrylate (PMMA) which is also known as Perspex and is produced by bulk polymerisation of methyl methacrylate is not a ______________ polymer?
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A. Linear

B. Thermosetting

C. Glass like transparent

D. Thermoplastic

5454. Which of the following is not a condensation polymer ?
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A. Bakelite

B. None of these

C. Poly-methyl-methacrylate (PMMA)

D. Melamine polymer

5455. Liners of bags are usually made of ____________________?
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A. Polyesters

B. Polythene

C. Polypropylene

D. PVC

5456. Polymerisation process in which two or more monomers of chemically different nature take part is called__________________?
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A. None of these

B. Chain polymerisation

C. Copolymerisation

D. Addition polymerisation

5457. Dacron is a _____________________________?
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A. Thermosetting material

B. None of these

C. Condensation polymerisation product of dimethyl terephthalate (DMT) and ethylene glycol

D. Condensation polymerisation product of Hexamethylene diamine and adipic acid

5458. The major constituent of laminate of safety glass, which holds the broken glass, pieces in their places during accident (and thus minimises the danger from flying glass fragments) is____________________?
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A. PVC

B. Polyvinyl acetate

C. Polyvinyl alcohol

D. Polyvinyl butyral
5459. Polycaprolactam is____________________?
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A. Nylon-6

B. Rayon

C. Nylon-66

D. Dacron

5460. A chain growth polymerisation reaction consists of three different types of reaction namely initiation reaction, propagation reaction & termination reaction. Chain growth polymerisation reaction is not involved in the manufacture of_______________________?
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A. Siloxane elastomers

B. Vinyl polymers

C. Polyamides

D. Urea-formaldehyde resins
5461. Traces of tar fog present in the coke oven gas is removed by_________________?
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A. Washing with monoethanolamine

B. Electrostatic precipitator

C. Cyclone separator

D. Wet packed scrubber

5462. Which of the following is generally not drawn into fiber ?
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A. Unsaturated polyesters

B. Polyacrylonitrile

C. Polyamide

D. Saturated polyesters

5463. Vulcanisation of rubber does not increase its_________________?
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A. None of these

B. Elasticity

C. Ductility

D. Plasticity
5464. Polyhexamethylene adipamide is also known as______________?
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A. Nylon-66

B. Epoxy resin

C. Silicone rubber

D. Bakelite

5465. Poly-tetra-fluoro ethylene (PTFE) is known as_________________?
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A. Teflon

B. Celluloid

C. Bakelite

D. Dacron

5466. Percentage of carbon monoxide in blast furnace gas may be around ____________________ ?
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A. 52

B. 8

C. 14

D. 22
5467. Dacron is a/an___________________?
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A. Addition polymer

B. Condensation polymer

C. Polyester

D. Both B. and C.
5468. Main component of sewage gas produced during anaerobic decomposition of organic waste (by suitable bacteria) during sewage disposal is __________________?
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A. H2

B. N2

C. CH4

D. CO2

5469. Which is the most matured coal ?
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A. Semi-anthracite

B. Lignite

C. Anthracite

D. Bituminous

5470. Zeigler Natta catalyst (AlR3 AlCl3) is used in the polymerisation of_________________?
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A. Styrene

B. Vinyl acetate

C. Propylene

D. Vinyl chloride

5471. Bristles of tooth brushes are made of_______________?
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A. Nylon-66

B. Nylon-6

C. PVC

D. Polystyrene

5472. In a co-polymer, the repeating units contain two different monomers. Which of the following is a copolymer ?
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A. Buna-S

B. PTFE

C. PMMA

D. Polycaprolactam

5473. Fuel for a nuclear reactor (thermal) is ____________________?
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A. None of these

B. Radium

C. Uranium

D. Plutonium

5474. Which of the following is stretched into fibers ?
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A. Isoprene

B. Bakelite

C. Unsaturated polyester

D. Saturated polyester
5475. In flue gas analysis by Orsats apparatus, carbon monoxide is absorbed by__________________?
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A. None of these

B. Potassium hydroxide

C. Cuprous chloride

D. Alkaline pyrogallol solution

5476. _______________________ is not a condensation polymer ?
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A. Nylon-66

B. Dacron

C. Polystyrene

D. Teflon
5477. Largest constituent of blast furnace gas is__________________?
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A. CO

B. N2

C. CO2

D. H2

5478. High excess air in combustion of fuels results in____________________?
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A. Increased fuel consumption

B. Incomplete combustion

C. None of these

D. Smoky flame

5479. ______________ is an addition polymer ?
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A. Polythene

B. Nylon

C. Bakelite

D. None of these

5480. Pitch creosote mixture (PCM) as compared to furnace oil is a better fuel, because its ___________________?
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A. All A., B. and C.

B. Flue gas has lower dew point thereby facilitating more waste heat recovery

C. Sulphur content is lower

D. Emissivity factor is higher

5481. Thermocol (expanded polystyrene) is not used for __________________?
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A. High temperature thermal insulation in furnaces

B. Acoustic control and ceiling for building

C. Low temperature thermal insulation as in refrigerator and air conditioners

D. Packing of delicate electronic gadgets

5482. The hottest part of the flame lies in its _______________ zone?
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A. Non-luminous

B. Luminous

C. Unburnt gases

D. Yellow

5483. Pick out the correct statement ?
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A. Plastics are good conductors of heat and electricity

B. All the polymers are highly crystalline in nature

C. ymerisation</strong>

D. The liquid polymer becomes greasy, then waxy and finally solid on increasing the degree of

E. Polymers can be vaporised by heating to a very high temperature

5484. Synthetic rubber___________________?
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A. Is brittle at low temperature

B. Deforms, if stretched to double of its original dimension

C. Is softer at higher temperature

D. Is highly permeable to air & water and is readily attacked by chemicals & atmospheric gases
5485. Which of the following low molecular weight (<104), soft & waxy polymer is used in chewing gum? ?
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A. Thiokol

B. Polyvinyl acetate

C. PVC

D. Cellulose acetate

5486. Which of the following rubbers has the widest service temperature range (-75 to 275C) ?
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A. Butyl rubber

B. Nitrile rubber

C. Silicone rubber

D. Silicon rubber

5487. _____________ polymer is produced by the copolymerisation of vinyl chloride-vinyl acetate?
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A. Fibrous

B. Hard

C. Rubbery

D. Leathery
5488. Rayon is superior to cotton in making gauge for wound treatment, because rayon_____________________?
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A. Is a synthetic polymer

B. Does not stick to the wound unlike cotton

C. Can absorb over 90% of its own weight of water

D. Both B. and C.

5489. Silicone is a/an ___________________?
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A. Thermoplastic material

B. A natural polymer

C. Inorganic polymer

D. Monomer

5490. Bunsen burner is an example of a/an _____________ burner?
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A. Rotary cup

B. Outside mixing/diffusion flame/nozzle mix type

C. Inside mixing/premix type

D. Submerged combustion

5491. Plasticisers are added to synthetic plastics to ________________?
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A. All A., B. and C.

B. Develop new improved properties not present in the original resin

C. Improve workability during fabrication

D. Impart flexibility

5492. Bomb calorimeter can be used to determine the _____________ of the coal?
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A. Sulphur content

B. Calorific value

C. Both A. & B.

D. Neither A. nor B.

5493. The inter particle forces between linear chains in nylon-66 are ______________ bonds?
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A. None of these

B. Hydrogen

C. Ionic

D. Covalent

5494. _____________ of the coal is the basis for Seylors coal classification?
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A. Proximate analysis

B. Ultimate analysis

C. Calorific value

D. Caking index

5495. In step growth polymerisation, condensation occurs in a stepwise manner with or without the elimination of smaller molecules. An example of step growth polymerisation product is________________?
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A. PVC

B. Terylene

C. Polybutadiene

D. Polypropylene

5496. The process involved in converting rubber into a thin sheet or coating it on fabric is called__________________?
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A. Extrusion

B. Vulcanisation

C. Calendaring

D. Mastication

5497. _______________ is a copolymer ?
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A. PVC

B. Polypropylene

C. Poly tetra fluoro ethylene

D. Nylon-66
5498. Poly Vinyl chloride (PVC) is a ________________ material?
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A. Fibrous

B. Thermoplastic

C. Chemically active

D. Thermosetting

5499. Buna-N is also called__________________?
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A. Neoprene

B. Nitrile rubber

C. Butyl rubber

D. Thiokol

5500. Terylene is a/an_________________?
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A. Homopolymer

B. Addition polymer

C. None of these

D. Poly amide