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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.

Separation of isotopes is generally done using a/an _______________ centrifuge?

A Ultra

B Disk-bowl

C Both A. & B.

D Neither A. nor B.

Review Detailed Answer

Correct Answer: Ultra

Grinding efficiency of a ball mill is of the order of _______________ percent?

A 1-5

B 40-50

C 75-80

D 90-95

Review Detailed Answer

Correct Answer: 1-5

Cement clinker is reduced to fine size by a _____________________?

A Roll crusher

B Ball mill

C Tube mill

D Hammer mill

Review Detailed Answer

Correct Answer: Tube mill

In screen analysis, the notation +5 mm/-10 mm means particles passing through ____________________?

A 10 mm screen and retained on 5 mm screen

B 5 mm screen and retained on 10 mm screen

C Both 5 mm and 10 mm screens

D Neither 5 mm nor 10 mm screen

Review Detailed Answer

Correct Answer: 10 mm screen and retained on 5 mm screen

The critical speed of a trommel (N) is related to its dia D. as _____________________?

A N ∝ 1/√D

B N ∝ √D

C N ∝ D

D N ∝ 1/D

Review Detailed Answer

Correct Answer: N ∝ 1/√D

At low Reynold’s number, the power (P) required for agitating a fluid in a stirred tank becomes independent of inertial forces. In this limit, indicate which of the following relations is satisfied: Po = ρ/ρN3 D5: Power number Re = ρ N D2/μ: Reynold’s number N is the impeller rotational speed, and D is the impeller diameter ?

A Po ∝ Re-1.0

B Po ∝ Re0.0

C Po ∝ Re0.5

D Po ∝ Re1.0

Review Detailed Answer

Correct Answer: Po ∝ Re0.0

A _______________ employs a set of screen across a flow channel for the separation of dirt/rust from a flowing liquid stream?

A Thickener

B Classifier

C Strainer

D Clarifier

Review Detailed Answer

Correct Answer: Strainer

Laminar flow region is said to exist during agitation of a liquid in an agitator, when the value of Reynolds number is________________?

A > 10

B < 10

C > 100

D < 100

Review Detailed Answer

Correct Answer: < 10

_______________ centrifuge is the most suitable for separation of non-friable crystals?

A Tubular bowl

B Disc-bowl

C Perforated horizontal basket continuous

D Suspended batch basket

Review Detailed Answer

Correct Answer: Perforated horizontal basket continuous

In a size reduction crushing operation, feed size is 300 to 1500 mm while the product size is 100 to 300 mm. This is a case of the ________________ crushing?

A Secondary

B Fine

C Primary

D Ultrafine

Review Detailed Answer

Correct Answer: Primary

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Chemical Engineering Mcqs 9594 MCQs [All-Courses]

All Topics 9594

All Topics 9594

Separation of isotopes is generally done using a/an _______________ centrifuge?

Grinding efficiency of a ball mill is of the order of _______________ percent?

Cement clinker is reduced to fine size by a _____________________?

In screen analysis, the notation +5 mm/-10 mm means particles passing through ____________________?

The critical speed of a trommel (N) is related to its dia D. as _____________________?

A _______________ employs a set of screen across a flow channel for the separation of dirt/rust from a flowing liquid stream?

Laminar flow region is said to exist during agitation of a liquid in an agitator, when the value of Reynolds number is________________?

_______________ centrifuge is the most suitable for separation of non-friable crystals?

In a size reduction crushing operation, feed size is 300 to 1500 mm while the product size is 100 to 300 mm. This is a case of the ________________ crushing?