chemical engineering MCQs – Page 53

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 Review each marked answer and report any item that may be outdated or unclear.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
1041. Cellulose content of bamboo and ideal fibrous raw material for the manufacture of paper is ______________ percent?
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A. 95

B. 50

C. 80

D. 10

1042. Varnish does not contain____________________?
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A. Pigment

B. Anti-skimming agent

C. Thinner

D. Dryer

1043. Temperature during hydrogenation of oil should not be more than 200C, otherwise it will result in______________________?
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A. Hydrogen embrittlement

B. Pyrolysis of oil

C. Sintering of porous catalyst

D. All A, B. and C.
1044. Commercial production of Vanaspati is done by _______________ of edible vegetable oils ?
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A. Hydrocracking

B. Hydrolysis

C. Oxidation

D. Hydrogenation
1045. Stereospecific agents are exemplified by________________?
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A. Radiation

B. Supported metal oxide catalysts

C. Ziegler catalysts

D. All A , B. & C
1046. The main aim behind cooling the digested chip at the bottom portion of the digestor by injecting cold black liquor is to___________________?
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A. None of these

B. Remove lignin by way of crystallisation

C. Increase the cellulose content

D. Avoid mechanical weakening of fibre
1047. Industrial production of chloroform requires acetone and_____________________?
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A. Phosgene

B. Ammonium chloride

C. Chlorine

D. Calcium hypochlorite
1048. Nicotine is___________________?
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A. A volatile alkaloid

B. Obtained by treating by-products of the tobacco processing industry

C. Both A. and B.

D. Neither A. nor B.

1049. Refractory bricks burnt at very high temperature have got______________?
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A. Greater resistance to corrosion by slags

B. None of these

C. Less resistance to corrosion by slags

D. High spalling tendency

1050. Ceramics are produced from silicates or clayish materials: Which of the following is not a ceramic material ?
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A. Teflon

B. Slag cement

C. Glasses

D. Porcelain/Potteries

1051. The most commonly used substance to speed up the sedimentation of sewage is___________________?
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A. Sodium bisulphite

B. Chlorine

C. Lime

D. Sulphuric acid

1052. Lime and soda ash are added to water to remove ___________________?
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A. Bacteria

B. Bicarbonates & sulphates of calcium and magnesium

C. Its corrosiveness

D. Undesirable taste and odour

1053. Paper pulp produced by Kraft/sulphate process is__________________ ?
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A. Dark colored

B. Bleached easily

C. Strong fibrous

D. Dull white in color

1054. Presence of H2S in raw water (to be chlorinated) results in the_____________________?
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A. None of these

B. Easy removal of its hardness

C. Reduced softening capacity of zeolite

D. Increased dosage of chlorine to provide a disinfecting residual in the water
1055. Iron ore hematite is concentrated using ____________________?
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A. Gravity separation

B. Froth floatation

C. Roasting

D. Electromagnetic separation mainly

1056. Chalcopyrite is the main ore of_________________?
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A. Copper

B. Lead

C. Tin

D. Iron

1057. Function of thinner in a paint is to ______________________ ?
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A. Form a protective film

B. Suspend pigments & dissolve film forming materials

C. Prevent gelling of the paint

D. Accelerate the oxidation of oil

1058. Pick out the endothermic reaction out of the following ?
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A. CO + 3H2 = CH4 + H2O

B. CaCO3 = CaO + CO2

C. C+ O2 = CO

D. CO + O2 = CO2

1059. ________________ acid is the main constituent of cotton seed oil ?
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A. Oleic

B. Palmitic

C. Linoleic

D. Acetic

1060. Insulin is an __________________ drug?
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A. Antibiotic

B. Anti-TB

C. None of these

D. Anti-malarial