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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.

The important dimensional group involved in the power requirement calculation in mixing operation is the _____________ number?

A Reynold’s

B Froude

C Both A. & B.

D Neither A. nor B.

Review Detailed Answer

Correct Answer: Both A. & B.

During agitation of liquids, the_________________?

A Froude number is independent for the curves between power number and Reynolds number in

B Power number becomes independent of impellers Reynolds number at high Reynolds number,

C Froude number is used to account for the effect of surface (e.g., the centre vortex) on the

D All A., B. and C.

Review Detailed Answer

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

Which of the following size reduction equipments employs mainly attrition for ultrafine grinding ?

A Jet mills

B Fluid energy mill

C Micronizer

D All A., B. and C.

Review Detailed Answer

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

Ribbon blenders are exclusively meant for __________________?

A Blending miscible liquids

B Non-flowing powder and thin pastes

C Bath mixing

D Continuous mixing

Review Detailed Answer

Correct Answer: Non-flowing powder and thin pastes

Critical Speed (Nc) of a ball mill is given by (where R1 and R2 are radii of ball mill and the ball respectively) ?

A Nc = (1/4π). √(g/R1 – R2)

B Nc = (1/2π). √(g/R1 – R2)

C Nc = (1/π). √(g/R1 – R2)

D Nc = (1/2π). √(R1 – R2/g)

Review Detailed Answer

Correct Answer: Nc = (1/2π). √(g/R1 – R2)

The optimum moisture content in solids to be crushed/ground ranges from _______________ percent?

A 3 to 4

B 8 to 10

C 10 to 15

D 15 to 20

Review Detailed Answer

Correct Answer: 3 to 4

Where the density difference of the two liquid phase to be separated is very small (as in milk cream separator), the most suitable separator is a____________________?

A Disc bowl centrifuge

B Sharpies super-centrifuge

C Batch basket centrifuge

D Sparkler filter

Review Detailed Answer

Correct Answer: Disc bowl centrifuge

Percentage of drum submerged in the slurry in case of rotary drum filter is ________________?

A 3

B 30

C 85

D 25

Review Detailed Answer

Correct Answer: 3

In a size reduction crushing operation, feed size is 100 to 300 mm. while the product size is 10 to 50 mm. This is a case of the _____________ crushing?

A Primary

B Secondary

C Fine

D Ultrafine

Review Detailed Answer

Correct Answer: Secondary

General mechanism of size reduction in intermediate and fine grinder is by __________________?

A Cutting action

B Compression

C Compression and tearing

D Impact and attrition

Review Detailed Answer

Correct Answer: Impact and attrition

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Chemical Engineering Mcqs 9594 MCQs [All-Courses]

All Topics 9594

All Topics 9594

The important dimensional group involved in the power requirement calculation in mixing operation is the _____________ number?

During agitation of liquids, the_________________?

Which of the following size reduction equipments employs mainly attrition for ultrafine grinding ?

Ribbon blenders are exclusively meant for __________________?

Critical Speed (Nc) of a ball mill is given by (where R1 and R2 are radii of ball mill and the ball respectively) ?

The optimum moisture content in solids to be crushed/ground ranges from _______________ percent?

Where the density difference of the two liquid phase to be separated is very small (as in milk cream separator), the most suitable separator is a____________________?

Percentage of drum submerged in the slurry in case of rotary drum filter is ________________?

In a size reduction crushing operation, feed size is 100 to 300 mm. while the product size is 10 to 50 mm. This is a case of the _____________ crushing?

General mechanism of size reduction in intermediate and fine grinder is by __________________?