Q281
Open questionTrommels are revolving screens which normally operate in the range of __________ rpm.
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Chemical Engineering · all questionsMechanical Operations
Mechanical Operations
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Q282
Open questionSeparation of a suspension or slurry into a supernatant clear liquid (free from particles) and a thick sludge containing a high concentration of solid is called
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Q283
Open questionAt 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/ρN3D5: Power number
Re = ρ ND2/μ: Reynold's number
N is the impeller rotational speed and D is the impeller diameter.
Po = ρ/ρN3D5: Power number
Re = ρ ND2/μ: Reynold's number
N is the impeller rotational speed and D is the impeller diameter.
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Q284
Open questionThe constants (Kb, Kr and Kk) used in the laws of crushing (i.e., Bond's law, Rittinger's law and Kick's law) depend upon the
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Q285
Open questionWhich of the following parts of a jaw crusher is subjected to maximum wear and tear during its operation?
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Q286
Open questionWhich of the following mechanical conveyors does not come under the division 'carriers'?
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Q287
Open questionWhich of the follwoing mechanical conveyors does not come under the division 'scrapers'?
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Q288
Open questionIn case of a revolving mill, wet grinding compared to dry grinding
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Q289
Open questionRange of compressibility co-efficient of the commercial compressible cake obtained in filtration operation is
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Q290
Open questionSeparation of isotopes is generally done using a/an __________ centrifuge.
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Q291
Open questionPick out the material having minimum Rittinger's number.
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Q292
Open questionAgglomeration of individual particles into clusters (flocs) is called flocculation. To prevent flocculation, the most commonly used dispersing agents are
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Q293
Open questionWhich of the following mineral dressing operations is termed as 'comminution'?
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Q294
Open questionCumulative analysis for determining surface is more precise than differential analysis, because of the
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Q295
Open questionScreen capacity is proportional to (where, S = screen aperture)
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Q296
Open questionRod mills employed for grinding
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Q297
Open questionUltra centrifuges are used for the separation of __________ solid particles.
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Q298
Open questionFeed size of ≥ 25 cms can be accepted by
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Q299
Open questionThe unit of filter medium resistance is
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Q300
Open questionA suspension of glass beads in ethylene glycol has a hindered settling velocity of 1.7 mm/s, while the terminal settling velocity of a single glass bead in ethylene glycol is 17 mm/s. If the Richardson-Zaki hindered settling index is 4.5, the volume fraction of solids in the suspension is
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