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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 energy required per unit mass to grind limestone particles of very large size to 100 μm is 12.7 kWh/ton. An estimate (using Bond’s law) of the energy to grind the particles from a very large size to 50 μm is________________?

A 6.35 kWh/ton

B 9.0 kWh/ton

C 18 kWh/ton

D 25.4 kWh/ton

Review Detailed Answer

Correct Answer: 18 kWh/ton

_______________ mill is not used for grinding wheat into flour and for milling of cereals & other ?

A Buhrstone

B Roller

C Attrition

D Pebble

Review Detailed Answer

Correct Answer: Pebble

Jigging is a technique by which different particles can be____________________?

A Separated by particle size

B Separated by particle density

C Separated by particle shape

D Mixed

Review Detailed Answer

Correct Answer: Separated by particle size

For the preliminary breaking of hard rock, we use a____________________?

A Gyratory crusher

B Ball mill

C Tube mill

D Squirrel-cage disintegrator

Review Detailed Answer

Correct Answer: Gyratory crusher

For grinding of cereals, grains, spices, pigments, saw dust, cork etc., the most extensively used size reduction equipment is a__________________?

A Buhrstone mill

B Ball mill

C Crushing rolls

D Hammer mill

Review Detailed Answer

Correct Answer: Buhrstone mill

_____________ is the most commonly used ‘filter aid’?

A Diatomaceous earth

B Fuller’s earth

C Vermiculite

D Semi-plastic clay

Review Detailed Answer

Correct Answer: Diatomaceous earth

Which of the following is not accomplished by agitation of liquids in agitators ?

A Dispersing gas in liquid

B Blending of immiscible liquids

C Dispersing immiscible liquid in form of emulsion

D Suspending solid particles

Review Detailed Answer

Correct Answer: Blending of immiscible liquids

Equivalent diameter of a particle is the diameter of the sphere having the same __________________?

A Ratio of surface to volume as the actual volume

B Ratio of volume to surface as the particle

C Volume as the particle

D None of these

Review Detailed Answer

Correct Answer: Ratio of surface to volume as the actual volume

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

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Chemical Engineering Mcqs 9594 MCQs [All-Courses]

All Topics 9594

All Topics 9594

The energy required per unit mass to grind limestone particles of very large size to 100 μm is 12.7 kWh/ton. An estimate (using Bond’s law) of the energy to grind the particles from a very large size to 50 μm is________________?

_______________ mill is not used for grinding wheat into flour and for milling of cereals & other ?

Jigging is a technique by which different particles can be____________________?

For the preliminary breaking of hard rock, we use a____________________?

For grinding of cereals, grains, spices, pigments, saw dust, cork etc., the most extensively used size reduction equipment is a__________________?

_____________ is the most commonly used ‘filter aid’?

Which of the following is not accomplished by agitation of liquids in agitators ?

Equivalent diameter of a particle is the diameter of the sphere having the same __________________?

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 ___________________?