chemical engineering MCQs – Page 122

Practise multiple-choice questions from chemical engineering for competitive examinations and subject revision. Review each marked answer and report any item that may be outdated or unclear.

chemical engineering Mcqs

2421. Which one is a filter aid ?
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A. None of these

B. Calcined lime

C. Diatomaceous earth

D. Canvas fabric

2422. Flow of filtrate through the cake in a plate and frame filter press is best described by the ______________ equation?
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A. Fannings

B. Hagen-Poiseuilles

C. Kremser

D. Kozeny-Carman

2423. Carbon black is pulverised in a_______________?
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A. Hammer crusher

B. Gyratory crusher

C. Ball mill

D. Roll crusher

2424. Berl saddle made of carbon cannot be used for ___________________?
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A. Oxidising atmosphere

B. Alkalis

C. SO2

D. H2SO4

2425. Use of grinding aids results in the ___________________?
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A. Enhanced production rate

B. Finer products

C. Both A. & B.

D. Neither A. nor B.

2426. Mixing mechanism employed in a pan mixer is by ________________?
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A. None of these

B. Mulling

C. Kneading

D. Dispersion

2427. As the reflux ratio decreases, the_________________?
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A. None of these

B. Column diameter increases

C. Number of plates increases

D. Separation becomes more efficient

2428. 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____________________?
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A. Sparkler filter

B. Disc bowl centrifuge

C. Batch basket centrifuge

D. Sharpies super-centrifuge

2429. Water-ethyl alcohol solution can be concentrated (in respect of alcohol concentration) by ________________ distillation?
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A. Atmospheric

B. High pressure

C. Vacuum

D. None of these

2430. Which is the most suitable conveyor for transportation of sticky material ?
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A. Apron conveyor

B. Belt conveyor

C. Screw conveyor

D. Pneumatic conveyor

2431. In an absorber, HETP does not vary with the____________________?
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A. None of these

B. Flow rate of liquid

C. Type and size of packing

D. Flow rate of gas

2432. To get a fine talc powder from its granules, the equipment used is____________________?
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A. Gyratory crusher

B. Jaw crusher

C. Roller crusher

D. Ball mill

2433. Molten ammonium nitrate is mixed with ground limestone in fertilizer plant in a__________________?
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A. Muller mixer

B. Banbury mixer

C. Mixer-extruder

D. Pug mill

2434. Filtration capacity of a rotary drum vacuum filter depends upon the_______________?
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A. Cake thickness

B. Characteristics of the feed slurry

C. Both A. & B.

D. Neither A. nor B.

2435. The equipment frequently used for adiabatic humidification-cooling operation with recirculating liquid is_________________?
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A. Induced draft cooling tower

B. Spray chamber

C. None of these

D. Natural draft cooling tower

2436. Ribbon blenders are exclusively meant for __________________?
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A. Bath mixing

B. Blending miscible liquids

C. Non-flowing powder and thin pastes

D. Continuous mixing

2437. Removal of activated carbon from glycerine is done by _________________?
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A. Batch basket centrifuge

B. Rotary vacuum filter

C. None of these

D. Plate and frame filter

2438. The capacity of a gyratory crusher is ______________ that of a jaw crusher with the same gape, handling the same feed & for the same product size range.?
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A. 2.5 times

B. 5 times

C. 10 times

D. Same as

2439. Which of the following remains constant during evaporative cooling process with recirculated water supply ?
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A. None of these

B. Relative humidity

C. Wet bulb temperature

D. Partial pressure of vapour

2440. Agglomeration of individual particles into clusters (flocs) is called flocculation. To prevent flocculation, the most commonly used dispersing agents are________________?
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A. Bi-carbonates

B. Carbonates

C. Sulphates

D. Silicates & phosphates

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