chemical engineering MCQs – Page 46

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 Review each marked answer and report any item that may be outdated or unclear.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
901. Which one can be directly solidified from gaseous state without entering into liquid state ?
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A. Helium

B. Oxygen

C. Carbon dioxide

D. None of these

902. Which of the following does not come under the sales expenses for a product of a chemical plant ?
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A. Advertising

B. Legal fees

C. Warehousing

D. Customer service

903. Pick out the correct statement ?
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A. Jet engine can work, where there is no atmosphere

B. Rocket engines carry oxygen required for the combustion in the form of oxidiser

C. Jet engines also carry oxidiser

D. Rocket engines cannot work, where there is no atmosphere

904. _________________ of depreciation calculation accounts for the interest on investment?
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A. Straight line method

B. Declining balance

C. Both A. and B.

D. Neither A. nor B.
905. The ratio of thermal & electrical conductivity is same for all the metals at the same temperature; and at around room temperature, this ratio is proportional to(where, T = absolute temperature, K) ?
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A. 1/T2

B. T

C. 1/T

D. T2

906. Gross earning is equal to the total income minus___________________?
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A. Income tax

B. Total product cost

C. Fixed cost

D. None of these

907. Velocity of a gas in sound is not proportional to (where, T = Absolute temperature of the gas. P = Absolute pressure of the gas. y = Ratio of specific heats (Cp/Cv) ? = specific weight of the gas) ?
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A. 1/??

B. ?y

C. ?T

D. 1/?P
908. Which of the following has the highest modulus of elasticity (about 7 106 kg/cm2) ?
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A. Stainless steel

B. Tungsten carbide

C. Superalloys

D. High speed steel

909. ______________ pipe is the most suitable for carrying sanitary drainage?
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A. Stainless steel

B. Asbestos cement

C. Cast iron

D. Reinforced cement concrete

910. _________________ is not a heat treatment process ?
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A. Austempering

B. Martempering

C. Cyaniding

D. Parkerizing
911. Which of the following terminology is used for the temperature at which new grains are formed in a metal ?
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A. Recrystallisation temperature

B. Eutectic temperature

C. Upper critical temperature

D. Lower critical temperature

912. Electrometallurgy is not involved in the extraction of ___________________ from its ore?
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A. Aluminium

B. Tin

C. Lead

D. Both B. & C.
913. Air-petrol ratio in an automotive petrol engine is around ________________?
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A. 25:01:00

B. 14 : 1

C. 4:01

D. 22:01

914. Work study deals with the _______________ study?
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A. Time

B. Motion

C. Both A. & B.

D. Neither A. nor B.

915. Glass reacts with___________________?
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A. K2Cr2O7

B. HNO3

C. HF

D. H2SO3

916. Euler number is defined as the ratio of inertia force to _______________ force?
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A. Pressure

B. Viscous

C. Gravity

D. Elastic

917. Nickel is a _________________ material?
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A. Ferroelectric

B. Semi-conductor

C. Paramagnetic

D. Ferromagnetic
918. Pick out the wrong statement ?
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A. Geothermal energy is a non-conventional source of energy

B. Mass is converted into energy in both nuclear fission & fusion reaction

C. Inhalation of mercury vapour is not harmful for human beings

D. Inhalation of arsenic causes cancer

919. Pick out the wrong statement about coating/electroplating of metals ?
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A. Calorising is the process of coating steel with chromium

B. Phosphate coating is less corrosion resistant than chromate coating

C. The base metal to be electroplated is normally made the cathode of the electrolytic cell and

D. Phosphate coating is used as an excellent base for paints & enamels

E. ting metal is made the anode

920. Identify the correct statement with reference to the extractive metallurgy of aluminium ?
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A. Approximately 80% of the aluminium deposited on the cathode comes from cryolite

B. Sodium is deposited along with aluminium, but is immediately vaporised

C. The electrolyte consists of molten Na3AlF6 with approximately 1 to 8% Al2O3

D. Anode effect sets in when the cryolite concentration goes below 40%.