This set of Energy Engineering Multiple Choice Questions Answers (MCQs) focuses on "Pulverised Mills 1". 1. How is coal pulverized in the ball mill? a) By rotating the cylinder. b) By rolling the cylinder. c) By hammering the cylinder. d) By jolting the cylinder. View Answer. 2.
Balls in a ball mill are usually made of. MCQ Buddy. ... Related MCQs on Materials And Construction . Q. Vacuum is generally maintained in the vapour space of an evaporator mainly to. Q. It is not preferable to use superheated steam in evaporators, because of its very. Q. In case of liquid petrofuels, momentary combustion is observed at its
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Construction of Ball Mill. A ball mill typically consists of a cylindrical drum partially filled with balls, typically made of steel or ceramic. The drum is mounted on a horizontal axis and is rotated by a motor. The mill also includes a feed hopper, which is used to introduce the material to be ground, and a discharge chute, which is used to ...
In many researches, they used encapsulated selenium to porous carbon. Like as this method. 1. ball milling with porous carbon and selenium powder. 2. Heat treatment. To exercise above method, i ...
This set of Engineering Physics Multiple Choice Questions Answers (MCQs) focuses on "Fabrication of Nanomaterials". 1. What's the procedure in Topdown fabrication method? a) Nanoparticles > Powder > Bulk b) Powder > Bulk > Nanoparticles c) Bulk > Powder > Nanoparticles d) Nanoparticle > Bulk > Powder View Answer
54. The efficiency of a ball mill is maximum at (a) High speed (b) Low speed (c) 2/3 rd speed (d) Very high speed. 55. Edge runner mill works on a principle upto (a) Crushing and attrition (b) Crushing and shearing force (c) Crushing and grinding (d) Cutting and attrition. 56. Fluid energy mill reduces the particles upto (a) 2550 micron (b) 120 micron (c) 50100 micron (d) 100150 micron
1) In ball mills, milling is performed by a cataract and cascade effect 2) Cataract effect: the impact of the trajectorydescribing bodies of grinding into the material to be milled 3) The shearing and rubbing effect of the bodies of grinding is called a cascade effect 4) The cataract effect is the highest when the critical rotation speed is ...
This set of Mechanical Operations Multiple Choice Questions Answers (MCQs) focuses on "Minimum Fluidisation Velocity". 1. Which of the following is the best condition for minimum fluidization? a) Drag force imparted by the down flowing gas equals the weight of the particles, and void space in the bed increases slightly.
250+ TOP MCQs on Ball Mill and Answers Mechanical Operations Multiple Choice Questions on "Ball Mill". 1. What is the average particle size of ultrafine grinders? a) 1 to 20 µm b) 4 to 10 µm c) 5 to 200 µm d) 50 to 100 µm Answer: a
Critical speed (in rpm) = /sqrt(D d) with D the diameter of the mill in meters and d the diameter of the largest grinding ball you will use for experiment (also expressed in meters)
c) Ball mill. d) Ball and race mill. Answer: Hammer mill. 16. How is coal pulverized in the ball mill? a) By rotating the cylinder. b) By rolling the cylinder. c) By hammering the cylinder. d) By jolting the cylinder. Answer: By rotating the cylinder. 17. What does the primary air that is induced by draught does in a bowl mill? a) Blows away ash
MOMCQ1 Free download as Word Doc (.doc / .docx), PDF File (.pdf), Text File (.txt) or read online for free. Mining MCQS. Mining MCQS. ... Size reduction of the _____ can be suitably done by ball mills, crushing rolls and rod mills. a) Nonmetallic ores b) Basic slags c) Asbestos mica d) Metalliferrous ores. 5. Pick out the ...
Mechanical Operations Multiple Choice Questions on "Advantages Of Ball Mill". 1. ____ is an open container usually cylindrical with uniform openings. a) Bowel b) Screen c) Magnifier d) Shredder Answer: b Clarification: A screen can be called as an open container usually cylindrical with uniform openings, it is normally made of wire mesh cloth. 2.
1. Identify this size reduction equipment? a) Rolling compression mill b) Burr mill c) Jaw crusher d) Hammer mill View Answer 2. What is other name for attrition mill? a) Rolling compression mill b) Burr mill c) Jaw crusher d) Hammer mill View Answer 3. Which of the following forces acts in ball mill? a) Gravitational force b) Centrifugal force
a) Ball mill b) Roll crusher c) Jaw crusher d) Gyratory Mill Answer: a Clarification: The ball mill works on the principle of impact, it consists of the horizontal cylinder lined with steel or high carbon plates. 8. The shell diameter ranges from ____ a) 1 to m b) 3 to m c) 2 to 3 m d) 5 to 10 m Answer: b
![[MCQ] Liners of a ball mill are never made of](/bs2qdyc/360.jpg)
Liners of a ball mill are never made of. MCQ Buddy. ... Related MCQs on Materials And Construction . Q. In case of a desorber (stripper), the. Q. Which of the following ceramic packing materials is the costliest of all? Q. Low stack loss indicates the. Q. In salt bath furnace, heat is transferred to the charge mainly by
Clarification: Ball mill works on the principle of impact and attrition. Size reduction is done by impact as the balls drop from near the top of the shell. A ball mill consists of a hollow cylindrical shell rotating about its axis. 6. What is the working principle of triple roller mill? a) Impact b) Compression c) Shear d) Tear Answer: c
Size reduction: To verify the laws of size reduction using a ball mill and determining Kicks, Rittinger's, Bond's coefficients, power requirement and critical speed of Ball Mill. X. Demonstration of colloid mill, planetary mixer, fluidized bed dryer, freeze dryer and such other major equipment. XI.
Mechanical Operations Lab MCQ Read online for free. Scribd is the world's largest social reading and publishing site. Open navigation menu. Close suggestions Search Search. en Change Language. ... Power required to drive a ball mill with a particular ball load is proportional to (where, D = diameter of ball mill ) A) D B) 1/D C) D) 1/D2 ...
61. Ball mill is used for Crushing Coarse grinding Fine grinding Attrition 62. Ball mills and tube mills with flint or porcelain balls are used for size reduction of Asbestos Rubber Nonmetallic ores Limestone 63. Balls for ball mills are never made of Forged/cast steel Lead Cast iron Alloy steel 64. Basic slag is not ground in Jaw crushers
Methods of Evaluation : Organoleptic evaluation. Microscopic evaluation. Chemical evaluation. Physical evaluation. Biological evaluation. 1) Organoleptic evaluation: Examination of the drug by color, odor, shape size, taste, touch, texture, and sound is known as Organoleptic evaluation. taste of fennel is sweet. Taste of clove is pungent.
Pharmaceutical Engineering Syllabus, MCQ, Notes, PDF, Books Downloads. Pharm Engg Chapterwise MCQ: UNITI MCQ * Flow of fluids * Size reduction * Size separation UNITI I MCQ * Heat transfer * Distillation * Evaporation UNITIII MCQ * Drying * Mixing UNITIV MCQ * Filtration * Centrifugation * UNITV MCQ Materials of construction * Corrosion.
The length of the mill is approximately equal to its diameter. Principle of Ball Mill : Ball Mill Diagram. • The balls occupy about 30 to 50 percent of the volume of the mill. The diameter of ball used is/lies in between 12 mm and 125 mm. The optimum diameter is approximately proportional to the square root of the size of the feed.
Engineering Questions with Answers Multiple Choice Questions. ... Mechanical Operations MCQ's Ball Mill. 1 Question. What is the average particle size of ultrafine grinders? a) 1 to 20 µm b) 4 to 10 µm c) 5 to 200 µm d) 50 to 100 µm. View Answer. Answer: a
D Pharmacy MCQ,D Pharmacy 1st Year Mcq Questions And Answers,Pharmaceutics 1 MCQ Questions With Answers Pdf,Pharmaceutics 1 MCQ Pdf, ... Ball mill (D) Roller mill. Ans A. Pharmaceutics 1 MCQ Pdf. 13. Fine powder should pass through which sieve number (A) 75 (B) 85 (C) 120 (D) 10. Ans B.
Principle The ball mill operates on the principle of impact and attrition. In this, impact occurs between fast moving balls and the powder material while the attrition mode comes in action when the hollow cylinder rotates on its longitudinal axis. All is occurs at low speed and the balls roll over each other. Construction
The formula for calculating critical mill of speed: N c = / √ (D d) Where: N c = Critical Speed of Mill. D = Mill Diameter. d = Diameter of Balls. Let's solve an example; Find the critical speed of mill when the mill diameter is 12 and the diameter of balls is 6. This implies that;
250+ TOP MCQs on Crushers and Answers. Mechanical Operations Multiple Choice Questions on "Crushers". 1. As the size of feed increases, size of product ____. Clarification: The larger the size of the feed the larger will be the size of the product, a smaller size reduction is obtained with hard material. 2. For a ball mill, what will happen ...
This mill do not have any moving part in the grinding area: A. Disintegrator mill B. Hammer mill C. Colloid mill D. Fluid energy mill 10. Which of following mill is free from wear? A. Ball mill B. Roller mill C. Edge runner mill D. Fluid energy mill 11. In Ball mill, how much volume should be occupied by material: A. 1030% B. 520% C. 5070% D ...
Fundamentally, a ball mill comprises a vessel or vial filled with balls, or rods, constructed from a variety of materials such as ceramic, agate, silicon nitride, sintered corundum, zirconia, chrome steel, CrNi steel, tungsten carbide or plastic polyamide (Fig. 2). The material to be milled is placed inside the vessel, which is made to ...
PE MCQ Read online for free. ... PHARMACEUTICAL ENGINEERING. Question Bank Flow of fluids: Types of manometers, Reynolds number and its significance, Bernoulli's theorem and its applications, Energy losses, Orifice meter, Venturimeter, Pitot tube and Rotometer. Multiple Choice Questions: 1. The fluid flow in which the fluid particles in one layer do not mix with the fluid particles in ...
ball mill: [noun] a pulverizing machine consisting of a rotating drum which contains pebbles or metal balls as the grinding implements.
Ball mill, is used in the combination of impact attrition. 3. LAWS GOVERNING SIZE REDUCTION: They are used to predict energy requirement for size reduction. 01. Rittinger's law. 02. Kick's law. 03. Bond's law. 04. Holmes law. 05. Harris law. 01]. Rittinger's law The energy required in crushing is proportional to the new surface ...
Question 1 answer Nov 13, 2023 Any one has an idia about the kind of jars and bowles we need for nanopowder preparation foe example using the Planetary Micro Mill PULVERISETTE 7 classic line. How...
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