Chemical Engineering Archives

Chemical Engineering

Prepare with the best Chemical Engineering MCQs with answers and detailed explanations for exams and job tests. Our collection covers key topics such as chemical process calculations, thermodynamics, fluid mechanics, heat transfer, mass transfer, reaction engineering, instrumentation, and plant design. These Chemical Engineering multiple-choice questions are ideal for students, competitive exam aspirants, and professionals preparing for NTS, PPSC, FPSC, PEC exams, GATE, university entry tests, and job interviews. Practice online with updated Chemical Engineering MCQs to strengthen your concepts and improve technical problem-solving skills.

2851. Sometimes water is sprayed during coal charging in the coke oven, which helps in

Prevention of clinker formation in the oven

Controlling the dust nuisance while charging the coal

Reducing the cracking of hydrocarbons in the gas and increasing the percentage of CO & H₂ in the gas (due to the endothermic reaction represented by C + H₂O = CO + H₂)

All of the above

✅ The correct answer is option D.

2852. Gross & net calorific value is the same for

Blast furnace gas

Coke oven gas

L.D. converter gas

None of these

✅ The correct answer is option C.

2853. Undercharging of coal in the by-product coke ovens results in

Decrease in the c.v. of coke oven gas

Increase in its throughput

Increase in the c.v. of coke oven gas

No change in the c.v. of coke oven gas

✅ The correct answer is option A.

2854. A coal having high amount of volatile matter

Would require smaller combustion chamber

Produces very little of tar and gas on carbonisation

Ignites easily and burns with long smoky flame

All of the above

✅ The correct answer is option D.

2855. Presence of force moisture in coal is most disadvantageous during its

Transportation and handling

Washing

Pulverisation

Storage

✅ The correct answer is option C.

2856. Power alcohol as compared to straight run gasoline has lower

Calorific value

Octane number

Specific gravity

Viscosity

✅ The correct answer is option A.

2857. High rate of heating of coke ovens

May damage its walls due to abrupt excessive swelling of coal

Produces larger size coke

Increases the time of carbonisation

None of these

✅ The correct answer is option A.

2858. Ignition temperature of a fuel in air is __________ that in pure oxygen.

More than

Less than

Equal to

Either more or less; depends on the type of fuel

✅ The correct answer is option A.

2859. Coal is heated in absence of air for 7 minutes at a temperature of about __________ °C, during its volatile matter determination for proximate analysis.

550

750

950

1150

✅ The correct answer is option C.

2860. Blast furnace gas constitutes mainly of

N₂ & CH₄

N₂ & H₂

N₂ & CO

CH₄ & CO₂

✅ The correct answer is option C.