chemical engineering mcqs to prepare for nts, kppsc, fpsc, ppsc and more

chemical engineering Mcqs

5401. Polycaprolactam (Nylon 6) is produced by the condensation polymerisation of caprolactam at 240-280C in which the conversion of caprolactam is about ______________ percent?
0

A. 90

B. 50

C. 99

D. 75

5402. Nylon-66 is manufactured from ____________________?
0

A. Dimethyl terephthalate (DMT) and ethylene glycol

B. Maleic anhydride and Hexamethylene diamine

C. Adipic acid and Hexamethylene diamine

D. Caprolactam

5403. Phenol formaldehyde __________________?
0

A. Employs addition polymerisation

B. Employs condensation polymerisation

C. Is an abrasive material

D. Is a monomer

5404. Size range of polymer molecules varies from __________ meter?
0

A. 10-2 to 10-5

B. 10-1 to 10-2

C. 10-8 to 10-10

D. 10-4 to 10-7

5405. Dacron (or Treylene) fibres as compared to nylon fibres have_____________________?
0

A. Poorer resistance to alkalis

B. Better heat & acid resistant properties

C. All A., B. and C.

D. Poorer dyeability

5406. Alkyd resin cannot be used for making_________________?
0

A. Film forming materials

B. Fibers

C. Paint & varnish

D. Plasticiser

5407. _______________ is a natural fiber?
0

A. Dacron

B. Nylon-6

C. None of these

D. Cellulose

5408. The physical state in which polymers exist is___________________?
0

A. Partially crystalline state

B. All A., B. and C.

C. Amorphous glassy state

D. Melts & rubber like state

5409. Thiokol is nothing but____________________?
0

A. Polyamide fibre

B. Engineering plastic

C. Polysulphide rubber

D. Expanded polystyrene

5410. Thermoplastic materials___________________?
0

A. Are heavily branched molecules

B. Do not soften on application of heat

C. None of these

D. Are solvent insoluble

5411. Coal is pulverised before burning in large capacity boiler furnaces mainly to____________________
0

A. Facilitate easy ash removal

B. Ensure its complete combustion

C. Enhance its calorific value

D. Provide trouble free operation

5412. Temperature maintained in the emulsion polymerisation reactor for PVC manufacture is about ______________ C?
0

A. 50

B. 500

C. 250

D. -20

5413. Phenol formaldehyde is produced by condensation polymerisation. It is also known as_________________?
0

A. Nylon-66

B. Bakelite

C. Teflon

D. Polyester

5414. Acrylonitrile is mainly used in the _____________ industry?
0

A. Polymer

B. Dyeing

C. Photographic

D. Printing

5415. _______________ is normally used for the manufacture of refrigerator components and transistor parts?
0

A. Polyurethane

B. Polystyrene

C. Polyester

D. Polypropylene

5416. Advantages of fluidised bed combustion are ____________________?
0

A. Lower furnace operating temperature

B. High heat transfer rate

C. All A., B. & C.

D. Reduced NOx formation in flue gas

5417. _____________ moulding is used for shaping of thermosetting plastics exclusively?
0

A. Transfer

B. Extrusion

C. Injection

D. Compression

5418. Which of the following is a polymer of Hexamethylene diamine and adipic acid ?
0

A. Nylon-6, 10

B. Nylon-6

C. Epoxy resin

D. Nylon-66

5419. Nitrile rubber is produced by the polymerisation of_________________?
0

A. Acrylonitrile & styrene

B. Acrylonitrile & butadiene

C. Isobutylene & isoprene

D. None of these

5420. Coke oven gas burns with a yellowish flame, because of the presence of __________________?
0

A. H2

B. CO2

C. CH4

D. NH3

5421. Supply of excess air for complete combustion of fuel is necessitated to facilitate___________________?
0

A. None of these

B. Attainment of high temperature

C. Attainment of chemical equilibrium

D. Its thorough mixing with air

5422. Cellulose is the main constituent of most ______________ fibres?
0

A. Natural

B. Acrylic

C. Spandex

D. Synthetic

5423. The monomer of natural rubber is A. DMT ______________________?
0

A. Isoprene

B. 2 methyl-1 propane

C. Both B. and C.

5424. Melamine formaldehyde resin which has a very high anti tacking properties, is not used for the ___________________?
0

A. Decorative laminates

B. Strengthening of plaster of Paris

C. Electrical insulation purpose

D. Tanning of leather

5425. Contact lenses for eyes are made of Perspex, which is nothing but_______________?
0

A. Polypropylene

B. Polystyrene

C. poly-methyl-methacrylate

D. Unsaturated polyester

5426. Polycaprolactam is nothing but __________________?
0

A. Orlon

B. Saran

C. Nylon-66

D. Nylon-6

5427. The calorific value of LPG (50% propane + 50% butane) is about ______________ kcal/Nm3?
0

A. 5000

B. 10,000

C. 15,000

D. 25,000

5428. Flexible foam (for mattresses) are usually made of _________________?
0

A. PVC

B. Polyurethanes

C. Silicone rubber

D. Polyamides

5429. Polycaprolactam is also known as _________________?
0

A. SBR

B. Teflon

C. Nylon-6

D. Nylon-66

5430. ? glucose is the monomer of__________________?
0

A. None of these

B. Protein

C. Starch

D. Cellulose

5431. In case of pulverised coal fired steam boiler, the secondary air serves the main purpose of__________________?
0

A. Transportation of coal

B. Preheating the primary air

C. Combustion of coal by supplying it around the burner

D. Drying of coal

5432. In a linear polymer, the monomeric units are linked together to form long straight chains. The cross linked or branched chain polymers compared to linear polymers have higher ___________________?
0

A. Tensile strength

B. Melting point

C. Densities

D. Hardness, rigidity & brittleness

5433. Very ______________ coals are completely devoid of cokability i.e., it is non-coking ?
0

A. Young

B. Mature

C. Both A & B

D. Neither A nor B

5434. Which of the following polymers shows the highest anti-tacking properties ?
0

A. Phenolic resin

B. Epoxy resin

C. Melamine formaldehyde resin

D. Alkyd resin

5435. Overfire burning in a furnace is a phenomenon characterised by the __________________?
0

A. Supply of excess fuel

B. None of these

C. Burning of carbon monoxide and other incombustibles in upper zone of furnace by supplying

D. Supply of excess air

E. e air</strong>

5436. Collapsible tubes for tooth paste are produced by _____________ extrusion?
0

A. Impact

B. Indirect

C. None of these

D. Direct

5437. Alkyd resin is a/an___________________?
0

A. Polyamide

B. Addition polymer

C. Polyester

D. Polyolefin

5438. Mott and Wheeler test is conducted on coke to find its _____________________?
0

A. Phosphorus content

B. Volatile matter content

C. Reactivity with O2

D. Abradability

5439. Cannel coal and boghead coal are the examples of _________________?
0

A. Humic coals

B. Sapropelic coals

C. Liptobiolites

D. None of these

5440. Largest constituent of coke oven gas is_________________?
0

A. H2

B. N2

C. CH4

D. CO2

5441. Which of the following is not a natural fiber ?
0

A. Wool

B. Cotton

C. Viscose rayon

D. Silk

5442. Desirable Micum Index values of metallurgical coke are ___________________?
0

A. M40 > 4% and M10 10% and M10 98% and M10 < 2%

B. M40 > 78% and M10 < 10%

5443. With increase in moisture content of coal, its___________________?
0

A. None of these

B. Caking properties diminish

C. Calorific value increases

D. Swelling during carbonisation becomes excessive

5444. Thermosetting plastic materials___________________?
0

A. Can be repeatedly melted

B. Cannot be melted after forming

C. Is useful for melt casting

D. Is useful for spinning

5445. ______________ fibres are made of polyamides?
0

A. Dacron

B. Nylon

C. Orion

D. Rayon

5446. Which of the following is an elastomer ?
0

A. Thiokol

B. Phenol formaldehyde

C. Polystyrene

D. Urea formaldehyde

5447. Catalyst used in Fischer-Tropsch process is_______________?
0

A. Alumina

B. Nickel

C. Thorium oxide

D. Zinc oxide

5448. Acrilan fibres used for making cloth, carpet & blankets, which is a hard, horny & high melting polymeric material is nothing but____________________?
0

A. Polyamide

B. Saturated polyester

C. Alkyd resin

D. Polyacrylonitrile

5449. Which of the following polymers does not belong to the class of Polyacrylate polymer ?
0

A. None of these

B. Poly Ethyl acrylate

C. PMMA

D. Polyacrylonitrile

5450. Chain growth polymerisation is a process, in which the monomers are added in a chain fashion, and it requires an initiator to produce the free radical. An example of chain growth polymerisation products is __________________?
0

A. Teflon

B. Polyester

C. Bakelite

D. Nylon-66

Previous Next

Showing 5401 to 5450 of 8709 mcqs

civil engineering

hrm

economics

agriculture

political science

statistics

english

electrical engineering

judiciary and law

computer

chemical engineering/chemical engineering basics

mechanical engineering

english literature

pak study

software engineering

mathematics

chemical engineering/process equipment and plant design

chemical engineering/mass transfer

medical

chemistry

chemical engineering/polymer technology

pakistan current affairs

chemical engineering/heat transfer chemical engineering

chemical engineering/chemical reaction

islamic studies

general knowledge

sociology

world current affairs

psychology

biology

chemical engineering/chemical environmental engineering chemical engineering

auditing

chemical engineering/process control and instrumentation

physics

chemical engineering/mechanical operations

chemical engineering/stoichiometry

chemical engineering/fertilizer technology

chemical engineering/fuels and combustion

chemical engineering/thermodynamics for chemical chemical engineering

chemical engineering/plant economics

finance

chemical engineering/materials and construction

marketing

chemical engineering/refractory technology

urdu general knowledge

accounting

election officer

chemical engineering/petroleum refinery engineering

everyday science

chemical engineering/nuclear power engineering

chemical engineering/chemical process

chemical engineering/fluid mechanics for chemical chemical engineering

pedagogy

chemical engineering

chemical engineering/furnace technology