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Chemical Engineering Mcqs 9594 MCQs [All-Courses]

Chemical Engineering MCQs designed for job test and interview preparation, particularly for fresh graduates, students, and candidates appearing in competitive exams. These multiple-choice questions cover important topics such as the fundamentals of chemical engineering, chemical processes, chemical reactions, process control, and instrumentation, along with other key concepts in the field.

A solid is being dried in the linear drying rate regime from moisture content Xo to XF. The drying rate is zero at X = 0 and the critical moisture content is the same as the initial moisture Xo. The drying time for M = (Ls/ARc) is (where, L = total mass of dry solid, A = total surface area for drying Rc = Constant maximum drying rate per unit area X = moisture content (in mass of water/mass of dry solids))_____________?

A M(Xo – XF)

B M(Xo/XF)

C M ln(Xo/XF)

D MXo ln(Xo/XF)

Review Detailed Answer

Correct Answer: MXo ln(Xo/XF)

The Hatta number is important in______________________?

A Multi-component distillation

B Binary distillation

C Gas absorption without chemical reaction

D Gas absorption with chemical reaction

Review Detailed Answer

Correct Answer: Gas absorption with chemical reaction

For a binary mixture with low relative volatility________________?

A Use steam distillation

B Use molecular distillation

C Use high pressure distillation

D An azeotrope may be formed during distillation

Review Detailed Answer

Correct Answer: An azeotrope may be formed during distillation

The interfacial area per unit volume of dispersion, in a gas-liquid contactor, for fractional hold up of gas = 0.1 and gas bubble diameter = 0.5 mm is given by (in m2/m3) ?

A 500

B 1200

C 900

D 800

Review Detailed Answer

Correct Answer: 500

Rayleigh’s equation applies to _________________ distillation?

A Continuous

B Steam

C Differential

D Flash

Review Detailed Answer

Correct Answer: Differential

In extraction, as the temperature increases, the area of heterogeneity (area covered by binodal curve)________________?

A Decreases

B Increases

C Remains unchanged

D None of these

Review Detailed Answer

Correct Answer: Decreases

Blowdown in a cooling tower____________________?

A Means discarding a small fraction of circulating water to prevent and limit the concentration

B Increases the scale forming tendencies of water

C Is undesirable

D All A., B. & C.

Review Detailed Answer

Correct Answer: Means discarding a small fraction of circulating water to prevent and limit the concentration

Plate efficiency in a distillation column is reduced due to the ______________________ of liquid?

A Entrainment

B Foaming

C Weeping & dumping

D All A., B. & C.

Review Detailed Answer

Correct Answer: All A., B. & C.

The wet and ‘dry bulb temperature for a vapour-gas mixture are 25°C and 30°C respectively. If the mixture is heated to 45°C at constant pressure, the wet bulb temperature will be ______________ °C?

A 25

B > 25

C < 25

D – 25

Review Detailed Answer

Correct Answer: 25

Pick out the wrong statement. Raoult’s law does not apply, when the______________________?

A Size of component molecules are not equal

B Attractive forces between like and unlike molecules in the solution are approximately equal

C Component molecules are non-polar

D Chemical combination or molecular association between unlike molecules takes place in the

Review Detailed Answer

Correct Answer: Component molecules are non-polar

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Chemical Engineering Mcqs 9594 MCQs [All-Courses]

All Topics 9594

All Topics 9594

The Hatta number is important in______________________?

For a binary mixture with low relative volatility________________?

The interfacial area per unit volume of dispersion, in a gas-liquid contactor, for fractional hold up of gas = 0.1 and gas bubble diameter = 0.5 mm is given by (in m2/m3) ?

Rayleigh’s equation applies to _________________ distillation?

In extraction, as the temperature increases, the area of heterogeneity (area covered by binodal curve)________________?

Blowdown in a cooling tower____________________?

Plate efficiency in a distillation column is reduced due to the ______________________ of liquid?

The wet and ‘dry bulb temperature for a vapour-gas mixture are 25°C and 30°C respectively. If the mixture is heated to 45°C at constant pressure, the wet bulb temperature will be ______________ °C?

Pick out the wrong statement. Raoult’s law does not apply, when the______________________?