chemical engineering MCQs – Page 43

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 Review each marked answer and report any item that may be outdated or unclear.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
841. Which of the following are made out of the carbon steel having carbon content of 0.9 to 1%?
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A. Mandrels, twist drills, small lathe tools and razors

B. Cutlery, screws, rivets and files

C. Small punches, broaches reamers and springs

D. Forgings like can shaft, structural steel plate, threading dies and drawing dies

842. _____________ method for profitability evaluation of a project does not account for investment cost due to land ?
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A. Rate of return on investment

B. Discounted cash flow

C. Net present worth

D. Pay out period
843. Energy to be supplied to the radioactive nucleus for the emission of a neutron is ________________ MeV?
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A. 7.8

B. 200

C. 0.8

D. 10000

844. Soap cannot be used with hard water, because _________________?
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A. They form insoluble calcium soaps which precipitate

B. None of these

C. Hard water contains sulphate

D. They attract back the removed dirt

845. In the manufacture of sulphuric acid from elemental sulphur, the following sequence of major operations is followed ?
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A. Furnace ? converter ? absorber

B. Converter ? furnace ? absorber

C. Furnace ? evaporator ? absorber

D. Furnace ? converter ? evaporator

846. Purchased cost of equipments for a chemical process plant ranges from _____________ percent of the fixed capital investment?
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A. 45 to 60

B. 10 to 20

C. 20 to 40

D. 65 to 75

847. An approximately _____________ process exemplifies the flow of a gas through a very long pipe of uniform cross-section ?
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A. Adiabatic

B. Isothermal

C. Isochoric

D. Isentropic

848. Solute atoms which cause yield point phenomenon in mild steel are/is_________________?
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A. Nitrogen

B. Boron

C. Aluminium

D. Carbon
849. ______________________ of quicklime produces slaked lime ?
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A. Hydrogenation

B. None of these

C. Dehydration

D. Hydration
850. GASOHOL widely used in Brazil as a motor fuel is a mixture of alcohol and____________________?
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A. Light hydrocarbon gases (e.g. butane or propane)

B. LPG

C. None of these

D. Petrol
851. Hot & cold working of material causes its _______________ deformation?
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A. Plastic

B. Isotropic

C. Elastic

D. Visco-elastic

852. In financial accounting of a chemical plant, which of the following relationship is invalid ?
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A. Assets = capital

B. Assets = liabilities + net worth

C. Assets = equities

D. Total income = costs + profits

853. Reynolds number of a fluid flowing in a circular pipe is 10,000. What will be the Reynolds number when the fluid velocity is decreased by 30% & the pipe diameter is increased by 30% ?
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A. 9,100

B. 7,000

C. 2,550

D. 13,000

854. The ______________ of a chemical company can be obtained directly from the balance sheet as the difference between current assets and current liabilities ?
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A. Liquids assets

B. Current ratio

C. Net working capital

D. Cash ratio

855. Presence of carbonaceous matter in the sewage____________________?
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A. All A, B. and C.

B. Causes reduction in its dissolved oxygen content thereby endangering the life of aquatic

C. atures

D. Reduces sulphate ions to sulphides causing obnoxious smell

E. Increases the quantity of chlorine used for its purification

856. Production of one ton of cement requires about _______________ tons of limestone ?
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A. 0.6

B. 1.2

C. 3.8

D. 2.2

857. Out of the following, the depreciation calculated by the _____________ method is the maximum?
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A. Diminishing balance

B. Straight line

C. Sinking fund

D. Sum of the years digit

858. The amount of simple interest during n interest period is (where, i = interest rate based on the length of one interest period, p = principal) ?
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A. p(1 + i)n

B. p.i.n.

C. p(1 + i.n)

D. p(1 i.n)

859. The property of material, by which a given amount of energy is absorbed by it without plastic deformation, is called the________________________?
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A. Ductility

B. Impact strength

C. Resilience

D. Toughness

860. Depreciation is ____________________ in profit with time?
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A. Increase

B. None of these

C. Decrease

D. No change