chemical engineering MCQs – Page 31

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 Review each marked answer and report any item that may be outdated or unclear.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
601. Load cells used for the measurement of weight has______________?
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A. No moving parts and incurs negligible deflection under load

B. Provision of thermal compensation and is hermetically sealed

C. All A, B & C

D. Compact & rugged construction with an accuracy of 0.1 to 1%

602. Fine grained steels have____________________?
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A. Higher tendency to distort

B. None of these

C. High ductility

D. High brittleness

603. Heat release during phase change is observed in case of a/an_________________?
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A. Boiler

B. Evaporator

C. All A. B. & C.

D. Condenser
604. The heat released by cooling one mole of copper from 400 K to room temperature (300 K) is (assume : Cp of copper is 23 J K-1mole-1) ?
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A. 2.3 106 J

B. 230 J

C. 4600 J

D. 2300 J
605. The underground well of a bio gas plant is called the________________?
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A. Oxidation well

B. Septic tank

C. Digestor

D. Lagoon

606. Increasing the carbon content of steel_________________?
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A. Decreases hardness

B. Increasing the ductility transition temperature

C. Reduces the upper shelf energy

D. Decreases brittleness

607. Pick out the wrong statement ?
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A. Most of the hydrocarbons are non-polar

B. None of these

C. ionise

D. Generally, non-polar compounds are chemically inactive, conduct electricity poorly and do

E. Molecules with symmetrical arrangements (e.g. CH4 or CCl4) are non-polar

608. Identify the false statement?
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A. Stress corrosion cracking is facilitated by tensile stress

B. Martensitic steels are less susceptible to pitting corrosion than austenitic steels

C. Hydrogen embrittlement is facilitated by tensile stress

D. Pitting corrosion is usually very localised

609. Normalising of an object does not________________________?
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A. Improve ductility

B. Improve yield strength

C. Improve mechanical properties

D. Refine coarse grain structure obtained during hot working

610. What happens, when SO2 is passed through a solution of H2S in water ?
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A. None of these

B. Precipitation of sulphur takes place

C. H2SO3 is formed

D. Oleum is formed

611. Which of the following metals is not subjected to electrolytic refining/purification ?
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A. Tin

B. Zinc

C. Aluminium

D. Copper

612. Routing in production, planning & control is concerned with the___________________?
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A. Balancing of load on machines

B. Progress of work performed

C. Authorisation of work to be performed

D. Sequence of operation to be performed
613. In case of brasses, with decreasing zinc percentage and increasing copper percentage, its _____________ increases ?
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A. Percentage elongation

B. All A, B & C

C. Tensile strength

D. Brinell hardness

614. Cassiterite is an ore of_________________?
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A. Molybdenum

B. Lead

C. Chromium

D. Tin
615. The passage between the nozzle and the _______________________ is called sprue in case of injection moulding?
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A. None of these

B. Runner

C. Mold

D. Cylinder

616. Hydrogen can be ________________?
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A. All (A), B. & C.

B. Produced by electrolysis of water

C. Liquefied & stored under cryogenic conditions

D. Used in I.C. engines as fuel

617. Blasting of tri-nitro-toluene (TNT) is done by mixing it with ammonium_______________?
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A. Sulphate

B. Chloride

C. Carbonate

D. Nitrate
618. The property of material, by which a given amount of energy is absorbed by it, without plastic deformation, is called__________________?
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A. Toughness

B. Resilience

C. Impact strength

D. Ductility

619. The mechanism involved in the removal of metal in drilling operation is by_________________?
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A. Compression

B. Extrusion

C. Shearing

D. Both B & C
620. Exposure to _________________ accelerates the degradation of plastics?
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A. High ambient temperature

B. Damp atmosphere

C. Ultraviolet radiation

D. High atmospheric temperature