chemical engineering MCQs – Page 71

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 Review each marked answer and report any item that may be outdated or unclear.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

1401. Dacron is a/an _________________?
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A. Unsaturated polyester

B. Polyamide

C. Inorganic polymer

D. Polyester

1402. Comparing sulphate process with sulphite process, we find that ______________ in the later ?
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A. Both temperature & pressure in the former is less than that

B. Both temperature & pressure in the former is more than that

C. Temperature is more in the former whereas pressure is more

D. Pressure is more in the former whereas temperature is less

1403. The process involved in converting rubber into a thin sheet or coating it on fabric is called ___________________?
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A. Mastication

B. Calendaring

C. Extrusion

D. Vulcanisation

1404. ____________ is a polysaccharide?
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A. Maltose

B. Starch

C. Sucrose

D. Glucose

1405. Main use of hydrazine is___________________?
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A. As a disinfectant

B. As a rocket fuel

C. In water treatment

D. As fire retardant

1406. Bleaching of paper pulp is done with__________________?
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A. Chlorine or chlorine dioxide

B. Magnesium sulphite

C. Activated clay

D. Bromine

1407. During the absorption of HCl gas in water (to produce liquid HCl), the gas is kept above dew point to__________________?
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A. Increase the rate of absorption

B. Avoid corrosion

C. None of these

D. Reduce the cooling water circulation rate

1408. Which one of the following is not likely to be a constituent of vegetable oils ?
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A. Oleic acid

B. Glycerol

C. Stearic acid

D. Citric acid

1409. Polycaprolactam is commercially known as___________________?
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A. Nylon-66

B. Nylon-6

C. Dacron

D. Rayon

1410. All enzymes are made of______________________?
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A. Amino acids

B. Proteins

C. Fats

D. Carbohydrates

1411. Isopropyl benzene produced by alkylation of benzene with propylene is known as _________________?
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A. Mercaptans

B. Neoprene

C. Gelatin

D. Cumene

1412. Impurities present in brine is normally removed by treatment with ?
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A. Lime, ammonia and carbon

B. All A , B. and C.

C. NH3 and CO2

D. Lime and soda ash

1413. Polyvinyl chloride (PVC) is____________________?
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A. Made by employing emulsion polymerisation

B. A condensation polymerisation product

C. None of these

D. A thermosetting material

1414. Which of the following is a bleaching agent added in the detergents to facilitate removal of stains caused due to blood, tea etc ?
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A. Caustic soda

B. Sodium silicate

C. Sodium borate

D. Sodium tripolyphosphate (STPP)

1415. Catalytic oxidation of naphthalene produces ?
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A. None of these

B. Phthalic anhydride

C. Styrene

D. Phenol

1416. Claude process of gas liquefaction employs___________________?
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A. Adiabatic expansion against a piston or in a turbine

B. Joule-Thomson expansion cooling

C. Merely compression of gas beyond its critical pressure

D. Heat exchange with colder stream

1417. Varnish does not contain_______________?
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A. Thinner

B. Pigment

C. Both A. & B.

D. Neither A. nor B.

1418. Conversion of CO to CO2 by steam in presence of a catalyst is called__________________?
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A. Steam gasification

B. Shift conversion

C. Steam reforming

D. None of these

1419. Oils are partially hydrogenated (not fully) to manufacture Vanaspati, because fully saturated solidified oils________________?
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A. Have affinity to retain harmful sulphur compounds

B. Cause cholesterol build up and blood clotting

C. Are prone to rancid oxidation

D. Always contain some amount of nickel (as their complete removal is very difficult)

1420. Production of one ton of dry paper pulp requires about ___________________ tons of bamboo or wood?
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A. 10

B. 2.5

C. 5

D. 1

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