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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 centrifugal filtration unit operating at a rotational speed of w has inner surface of the liquid (density ρL) located at a radial distance R from the axis of rotation. The thickness of the liquid film is δ and no cake is formed. The initial pressure drop during filtration is ___________________?

A ½w2 . R2 . ρL

B ½w2 . δ2 . ρL

C ½w2 . δρL (2R + δ)

D ½w2 . R . ρL(R + 2δ)

Review Detailed Answer

Correct Answer: ½w2 . δρL (2R + δ)

The basic filtration equation is given as dt/dV = (μ/A ΔP). [(α .CV/A) + Rm], where, V is volume of the filtrate; A is the filtration area, a is specific cake resistance, μ is viscosity of the filtrate, and C is the concentration of the solids in the feed slurry. In a 20 minutes constant rate filtration, 5 m3 of filtrate was obtained. If this is followed by a constant pressure filtration, how much more time in minutes, it will take for another 5 m3 of filtrate to be produced? Neglect filter medium resistance, Rm; assume incompressible cake ?

A 10

B 20

C 25

D 30

Review Detailed Answer

Correct Answer: 20

Colloid mills achieve size reduction mainly by___________________?

A Impact

B Attrition

C Cutting

D Compression

Review Detailed Answer

Correct Answer: Attrition

Cake resistance is___________________?

A Important in the beginning of filtration

B Decreased with the time of filtration

C Independent of pressure drop

D None of these

Review Detailed Answer

Correct Answer: None of these

A _____________ mill is a revolving mill divided into two or more sections by perforated partitions in which preliminary grinding takes place at one end and the finishing grinding at the discharge end?

A Compartment

B Tube

C Rod

D Pebble

Review Detailed Answer

Correct Answer: Compartment

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Chemical Engineering Mcqs 9594 MCQs [All-Courses]

All Topics 9594

All Topics 9594

A centrifugal filtration unit operating at a rotational speed of w has inner surface of the liquid (density ρL) located at a radial distance R from the axis of rotation. The thickness of the liquid film is δ and no cake is formed. The initial pressure drop during filtration is ___________________?

Colloid mills achieve size reduction mainly by___________________?

Cake resistance is___________________?

A _____________ mill is a revolving mill divided into two or more sections by perforated partitions in which preliminary grinding takes place at one end and the finishing grinding at the discharge end?