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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.

6621. Consider two pipes of same length and diameter through which water is passed at the same velocity. The friction factor for rough pipe is f₁ and that for smooth pipe is f₂. Pick out the correct statement.

f₁ = f₂

f₁ < f₂

f₁ > f₂

Data not sufficient to relate f₁ & f₂

✅ The correct answer is option C.

6622. The average value of heat of neutralisation of dilute solution of strong acids and strong bases is about __________ kcal/kg.mole of water formed.

6680

13360

2481

97302

✅ The correct answer is option B.

6623. Volute type of casing is provided in a centrifugal pump to

Convert velocity head to pressure head

Convert pressure head to velocity head

Reduce the discharge fluctuation

Increase the discharge

✅ The correct answer is option D.

6624. Kinetic theory of gases stipulates that, the

Energy is lost during molecular collisions

Molecules possess appreciable volume

Absolute temperature is a measure of the kinetic energy of molecules

None of these

✅ The correct answer is option C.

6625. The centre of pressure is

Always below the centroid of the area

Always above the centroid of the area

A point on the line of action of the resultant force

At the centroid of the submerged area

✅ The correct answer is option C.

6626. The atomic heat capacities of all solid elements __________ with decrease in temperature.

Increases

Decreases

Remains unchanged

Approach zero at 0°C

✅ The correct answer is option B.

6627. For a given Reynolds number, in a hydraulically smooth pipe, further smoothening __________ the friction factor.

Brings about no further reduction of

Increases

Decreases

None of these

✅ The correct answer is option A.

6628. The vapor pressure of water at 100°C is

100N/m²

76 cms of Hg

13.6 cms of Hg

760 mm wc

✅ The correct answer is option B.

6629. Reynolds number for flow of water at room temperature through 2 cm dia pipe at an average velocity of 5 cm/sec is around

2000

100

1000

✅ The correct answer is option D.

6630. A fluid whose apparent viscosity increases with shear rate is termed as the __________ fluid.

Newtonion

Viscous

Dilatant

Non-viscous

✅ The correct answer is option C.