chemical engineering MCQs – Page 50

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 Review each marked answer and report any item that may be outdated or unclear.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

981. Utilities in a chemical process plant includes compressed air, steam, water, electrical power, oxygen, acetylene, fuel gases etc. Utility costs for ordinary chemical process plants ranges roughly from _______________ percent of the total product cost?
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A. 25 to 35

B. 35 to 45

C. 1 to 5

D. 10 to 20

982. ______________ cannot increase the fatigue strength of a material?
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A. Grain refining

B. Grain coarsening

C. Shot peening

D. Surface hardening

983. One of the methods of purification of leach liquor is ion exchange, which involves_________________?
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A. Exchange between a solid phase and a gas phase

B. Exchange between two liquid phases

C. Exchange between a liquid phase and an organic resin phase

D. Exchange between a gaseous phase and a liquid phase

984. Which of the following is not a component of the fixed capital for a chemical plant facility ?
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A. Process equipment

B. Emergency facilities

C. Raw materials inventory

D. Utilities plants

985. If the interest rate of 10% per period is compounded half yearly, the actual annual return on the principal will be ______________ percent ?
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A. 10

B. < 20

C. 20

D. > 20

986. Which of the following is not a mathematical method for evaluation of profitability of a chemical process plant ?
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A. Discounted cash flow based on full life performance

B. Payout period

C. Cash reserve

D. Rate of return on investment

987. Plants produce carbohydrates from the CO2 present in the atmosphere by_________________?
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A. Oxidation

B. Photochemical reaction

C. Polymerisation

D. None of these

988. Carborundum consists mainly of_________________?
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A. Silicon carbide

B. Boron carbide

C. Bauxite

D. Calcium carbide

989. An example of unsteady non uniform flow is the flow of liquid under pressure through a__________________?
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A. Tapering pipe at constant flow rate

B. Tapering pipe at either decreasing or increasing flow rate

C. None of these

D. Long pipeline of constant diameter

990. . The effect of friction on the flow of steam through a nozzle is to decrease the _______________ of steam?
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A. Wetness

B. Mass flow rate

C. Both A & B

D. Neither A nor B

991. Accumulated sum at the end of 5 years, if Rs. 10000 is invested now at 10% interest per annum on a compound basis is Rs ?
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A. 15000

B. 18105

C. 12500

D. 16105

992. Sea water contains about ______________________ ppm of bromine ?
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A. 70

B. 1700

C. 500

D. 5

993. Na2CO3 is called _________________?
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A. Soda ash

B. Washing soda

C. Calcite

D. Plaster of Paris

994. The major use of butadiene is____________________?
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A. As an anti-skinning agent in paint

B. In the manufacture of synthetic rubber

C. As a plasticiser for unsaturated polyester

D. None of these

995. Main constituent of limestone is____________________?
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A. Na2CO3

B. CaSO4

C. CaCO3

D. MgCO3

996. Lubricating greases are a mixture of__________________?
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A. Mineral oil, soap and additives

B. Fatty oil and metallic soap

C. Mineral oil and metallic soap

D. Mineral oil and fatty oil

997. Thermosetting plastic materials____________________?
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A. Cannot be melted after forming

B. Can be repeatedly melted

C. Is useful for melt casting

D. Is useful for spinning

998. Sulphuric acid saturated with SO3 is called_________________?
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A. None of these

B. Concentrated H2SO4

C. Sulphurous acid

D. Oleum

999. Glaubers salt is chemically ?
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A. Potassium sulphate

B. Potassium chlorate

C. Calcium sulphate

D. None of these

1000. Yellow glycerine is made into white, using____________________?
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A. Activated carbon

B. Bauxite

C. Bentonite

D. Diatomaceous earth

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