chemical engineering MCQs – Page 345

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 Review each marked answer and report any item that may be outdated or unclear.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

6881. Which of the following has the least value of ultimate tensile strength (UTS) ?
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A. High carbon steel

B. Wrought iron

C. Medium carbon steel

D. Cast iron

6882. Entropy, which is a measure of the disorder of a system, is__________________?
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A. Independent of pressure

B. Independent of temperature

C. Zero at absolute zero temperature for a perfect crystalline substance

D. All A, B. & C

6883. Presence of even very minute amount (say 0.1%) of ______________ in copper, reduces its electrical conductivity very seriously?
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A. Bismuth

B. Arsenic

C. Antimony

D. Both B. and C.

6884. The damage/deterioration of metals by the ______________ action of fluids is called erosion?
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A. Abrasive

B. Corrosive

C. Both A. & B.

D. Neither A. nor B.

6885. Compressive strength of wood is usually more along the grains. The tenile strength of wood as compared to that of steel is about_______________?
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A. One twelfth

B. Half

C. One third

D. One fifth

6886. Tin coating on metals is not done by_____________________?
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A. Electro-deposition

B. Hot dipping

C. Spraying

D. Powder metallurgy

6887. With increase in the carbon percentage in the steel, its__________________?
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A. All A., B. and C.

B. Tensile strength increases

C. Hardness increases

D. Ductility reduces

6888. The equivalent diameter for fluid flow through square cross section channel of side x, for pressure drop calculation purpose is given by____________________?
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A. x

B. 4x

C. ?x

D. 2x

6889. Manganese in steel affects its__________________?
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A. Hardness

B. Tensile strength

C. None of these

D. Ductility

6890. Tin in its pure form is used for making_______________?
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A. Foil for wrapping cheese

B. Collapsible tubes for toilet preparations

C. All A., B. and C.

D. Cans for food packing

6891. Lead pipe is_____________________?
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A. Having very low elastic limit resulting in permanent deformation from either mechanical or

B. rmal strain

C. All A., B. and C.

D. Especially resistant to solutions containing H2SO4

E. Usually joined by burning (e.g. by melting to adjacent pieces with a torch)

6892. Carbon content in steel is ___________________ percent?
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A. 0.1-2

B. 6-Apr

C. 0.001-0.01

D. 4-Feb

6893. For the production of very high vacuum, a _____________ pump is normally used?
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A. Diffusion

B. Centrifugal

C. Jet ejector

D. Piston

6894. Creeping flow around a sphere is defined, when particle Reynolds number is___________________?
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A. < 0.1

B. < 500

C. < 2100

D. > 2.5

6895. At low Reynolds number______________?
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A. Viscous forces are unimportant

B. Viscous forces control and inertial forces are unimportant

C. Viscous forces control

D. Gravity forces control

6896. If in a flow field, between any two points, then the flow must be___________________?
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A. Unsteady, incompressible, irrotational

B. Steady, compressible and along a streamline

C. Steady, compressible, irrotational

D. Steady, incompressible, irrotational

6897. 1m3 of an ideal gas at 500 K and 1000 kPa expands reversibly to 5 times its initial volume in an insulated container. If the specific heat capacity (at constant pressure) of the gas is 21 J/mole . K, the final temperature will be ?
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A. 174 K

B. 274 K

C. 154 K

D. 35 K

6898. Steel pipes are normally manufactured by ______________ process?
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A. Forging

B. Electroforming

C. Cold working

D. Extrusion

6899. Which of the following is the most suitable material of construction for evaporator & its tubes for concentrating NaOH solution to 70% ?
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A. Karbate

B. Steel

C. Nickel

D. Cast iron

6900. Muntz metal is a/an alloys of____________________?
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A. Copper & zinc

B. Magnesium & tin

C. Ferrous material

D. Lead & tin

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