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1-Dont try to cram or spend more time here just read it fast and cover syllabus then practice MCQ's cheptor of same topic to check your progress. . |
2-Wrong options are also given but dont concentrate there, Right answer is in bold format. |
Q21 ⇒ In a grinding operation, the limiting particle size is the size of the __________ particle in the sample. neither (a) nor (b) [other wrong options] [Discuss in forum] smallest largest either (a) or (b) |
Q22 ⇒ Size reduction of __________ is accomplished in steam heated rollers and roll crushers. hard rubber [other wrong options] [Discuss in forum] resins gums waxes |
Q23 ⇒ Sizing of very fine particles of the order of 5 to 10 microns is done by elutriation, which is a __________ operation. classification [other wrong options] [Discuss in forum] clarification sedimentation flocculation |
Q24 ⇒ Size reduction of ice and gypsum can be accomplished suitably by a __________ crusher. toothed roll [other wrong options] [Discuss in forum] Blake jaw gyratory none of these. |
Q25 ⇒ Froth floatation is the most suitable for treating sulphide ores [other wrong options] [Discuss in forum] iron ores quartzite none of these |
Q26 ⇒ In paint industries, blending of light paste is done by using a charge can mixer [other wrong options] [Discuss in forum] masticator kneader none of these |
Q27 ⇒ Use of grinding aids results in the neither (a) nor (b). [other wrong options] [Discuss in forum] enhanced production rate. finer products. both (a) & (b). |
Q28 ⇒ The main size reduction operation in ultrafine grinders is attrition [other wrong options] [Discuss in forum] cutting compression impact |
Q29 ⇒ Cartridge filters are termed as 'edge' filters, because of the fact that the bulk of the solids are removed at the periphery of the disks. [other wrong options] [Discuss in forum] disks have very sharp edge. solids are not deposited at the edge of the disk. none of these. |
Q30 ⇒ The optimum moisture content in solids to be crushed/ground ranges from __________ percent. 3 to 4 [other wrong options] [Discuss in forum] 8 to 10 10 to 15 15 to 20 |
Q31 ⇒ 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 disc bowl centrifuge. [other wrong options] [Discuss in forum] sharpies supercentrifuge. batch basket centrifuge. sparkler filter. |
Q32 ⇒ Power consumption during turbulent flow in agitation tank is proportional to the __________ of the liquid. density [other wrong options] [Discuss in forum] viscosity thermal conductivity surface tension |
Q33 ⇒ Capacity (in tons/hr) of jaw/gyratory crusher is equal to (where, L = length of the receiving opening, cm S = greater width of the discharge opening, cm) 0.087 L.S [other wrong options] [Discuss in forum] 0.01 L.S L.S L.S/0.087 |
Q34 ⇒ In a roll crusher, the specific power consumption and the production rate is affected by the both (a) and (b). [other wrong options] [Discuss in forum] reduction ratio. differential roll speed. neither (a) nor (b). |
Q35 ⇒ Feed size of ≥ 25 cms can be accepted by jaw crusher [other wrong options] [Discuss in forum] ball mill rod mill fluid energy mill |
Q36 ⇒ Helical screw agitator is used for mixing highly viscous pastes. [other wrong options] [Discuss in forum] blending immiscible liquids. mixing liquids at very high temperature (> 250 °C). none of these. |
Q37 ⇒ Maximum size reduction in a ball mill is done by the, __________ action. impact [other wrong options] [Discuss in forum] attrition compression cutting |
Q38 ⇒ In ball mill operation, the feed size (Df in meters) and the ball diameter (Db in metres) are related as ( where, K = grindability constant (varying from 0.9 to 1.4 in increasing order of hard ness)) Db2 = K.Df [other wrong options] [Discuss in forum] Db = K.Df Db3 = K.Df Db2 = K.Df2 |
Q39 ⇒ The resistance offered by the filter used in a bag filter is proportional to (where, c = dust concentration, and s = particle size ) c/s [other wrong options] [Discuss in forum] s/c s . c 1/s . c |
Q40 ⇒ __________ mill is not used for grinding wheat into flour and for milling of cereals & other vegetable products. Pebble [other wrong options] [Discuss in forum] Buhrstone Roller Attrition |
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