chemical engineering MCQs – Page 275

Practise multiple-choice questions from chemical engineering for competitive examinations and subject revision. Review each marked answer and report any item that may be outdated or unclear.

chemical engineering Mcqs

5481. Thermocol (expanded polystyrene) is not used for __________________?
0

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?
0

A. Non-luminous

B. Luminous

C. Unburnt gases

D. Yellow

5483. Pick out the correct statement ?
0

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___________________?
0

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? ?
0

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) ?
0

A. Butyl rubber

B. Nitrile rubber

C. Silicone rubber

D. Silicon rubber

5487. _____________ polymer is produced by the copolymerisation of vinyl chloride-vinyl acetate?
0

A. Fibrous

B. Hard

C. Rubbery

D. Leathery

5488. Rayon is superior to cotton in making gauge for wound treatment, because rayon_____________________?
0

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 ___________________?
0

A. Thermoplastic material

B. A natural polymer

C. Inorganic polymer

D. Monomer

5490. Bunsen burner is an example of a/an _____________ burner?
0

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 ________________?
0

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?
0

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?
0

A. None of these

B. Hydrogen

C. Ionic

D. Covalent

5494. _____________ of the coal is the basis for Seylors coal classification?
0

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________________?
0

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__________________?
0

A. Extrusion

B. Vulcanisation

C. Calendaring

D. Mastication

5497. _______________ is a copolymer ?
0

A. PVC

B. Polypropylene

C. Poly tetra fluoro ethylene

D. Nylon-66

5498. Poly Vinyl chloride (PVC) is a ________________ material?
0

A. Fibrous

B. Thermoplastic

C. Chemically active

D. Thermosetting

5499. Buna-N is also called__________________?
0

A. Neoprene

B. Nitrile rubber

C. Butyl rubber

D. Thiokol

5500. Terylene is a/an_________________?
0

A. Homopolymer

B. Addition polymer

C. None of these

D. Poly amide

Previous Next

Showing 5481 to 5500 of 8709 mcqs