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chemical engineering MCQs

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 Review each marked answer and report any item that may be outdated or unclear.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

1. The thermodynamic law, PVy = constant, is not followed by the __________________?
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A. Ideal compression of air

B. Free expansion of an ideal gas

C. Adiabatic expansion of steam in turbine

D. Adiabatic compression of air

2. About _________________ ton of coke is required in a cupola to produce one ton of casting ?
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A. 0.8

B. 1.5

C. 0.03

D. 0.3

3. Minimum number of members required to form a Public Limited Joint Stock Com-pany is___________________?
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A. 12

B. 10

C. 17

D. 7

4. Drills are usually made of__________________?
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A. Alloy steel

B. Cermets

C. Tungsten carbide

D. High speed steel

5. Broaching tools are usually made of____________________?
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A. Cermets

B. High speed steel

C. Tungsten carbide

D. Stellite

6. The heat of neutralisation remains constant, when there is a reaction between dilute solutions of strong _____________________?
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A. None of these

B. Acid and weak base

C. Base and strong acid

D. Base and weak acid

7. Volume of blast furnace slag is about _______________ times the volume of hot metal (pig iron) of the same weight ?
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A. 5

B. 3

C. 7

D. 1.5

8. The elastic strain energy of a unit length of an edge dislocation as compared to that of a screw dislocation is____________________?
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A. More

B. Equal

C. Less

D. Double

9. Which of the following approaches the ideal gas behavior most closely ?
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A. Saturated water

B. Superheated steam

C. Wet steam

D. Saturated steam

10. The lightest non-inflammable gas is_________________?
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A. O2

B. H2

C. Ar

D. He

11. Alloying elements present in Haynes stellite, which has superior performance than high speed steel, are____________________?
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A. Tungsten, chromium & cobalt

B. Nickel, cobalt & chromium

C. Manganese, chromium & cobalt

D. Tungsten, molybdenum & nickel

12. The dew point of moist air becomes ____________________ with decrease in its relative humidity ?
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A. Less than the wet bulb temperature

B. Equal to wet bulb temperature

C. More than the dry bulb temperature

D. More than the wet bulb temperature

13. Which of the following is not the function of a volute casing provided in a centrifugal pump ?
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A. stant velocity

B. To collect liquid from the periphery of the impeller and to transmit it to the delivery pipe at

C. To increase the pump discharge rate

D. To increase the pump efficiency

E. To reduce the head loss in discharge

14. In case of condensers & evaporators operating under given terminal conditions, LMTD (logarithmic mean temperature difference) for counter flow as compared to that for parallel flow is__________________?
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A. Much more

B. Equal

C. More

D. Less

15. Unit of surface tension in S.I. unit is_________________?
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A. Joule/m

B. Joule/m2

C. Newton/m2

D. Watt/m

16. Boiling point of water gets lowered at high altitudes (e.g., hills), because ___________________?
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A. Temperature is low

B. Atmospheric pressure is high

C. Atmospheric pressure is low

D. None of these

17. Between 230 and 370C, blue brittleness is caused in mild steel because of the_________________?
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A. Increase in Youngs modulus

B. Immobility of dislocation

C. Strain hardening

D. Strain-ageing

18. Which of the following metals cannot be hot worked at room temperature ?
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A. Tin

B. Zinc

C. Lead

D. Nickel

19. The function of neutral flux used in the pyrometallurgy of metal extraction is to increase the _____________ of the slag ?
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A. Basicity

B. Acidity

C. Viscosity

D. Fluidity

20. Colour comparator is used to measure the___________________?
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A. Colour intensity

B. Electrode potential

C. None of these

D. pH value

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