Description : If a force greater than that of gravity is used to separate solids & fluidsof different densities, the process is termed as the (A) Sedimentation (B) Flocculation (C) Dispersion (D) Centrifugation
Last Answer : (D) Centrifugation
Description : Sizing of very fine particles of the order of 5 to 10 microns is done by elutriation, which is a __________ operation. (A) Clarification (B) Sedimentation (C) Flocculation (D) Classification
Last Answer : (D) Classification
Description : Separation 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 (A) Classification (B) Sedimentation (C) Clarification (D) Decantation
Last Answer : (B) Sedimentation
Description : The process opposite to 'dispersion' is termed as the (A) Flocculation (B) Sedimentation (C) Filtration (D) None of these
Last Answer : (A) Flocculation
Description : Separation of solid suspended in liquid into a supernatant clear liquid and a denser slurry employs a process termed as the (A) Coagulation (B) Flocculation (C) Sedimentation (D) Clarification
Last Answer : (C) Sedimentation
Description : Which of the following is the most efficient for removal of very finely divided suspended solids and colloidal matter from the polluted waterstream? (A) Sedimentation tank (B) Circular clarifier (C) Mechanical flocculation (D) Chemical coagulation
Last Answer : (D) Chemical coagulation
Description : Very fine suspended and colloidal impurities are removed from water by a process called (A) Sedimentation (B) Coagulation (C) Disinfection (D) Softening
Last Answer : (B) Coagulation
Description : Why Filtration is a better method than simple sedimentation and decantation?
Last Answer : Filtration can remove solid particles as small as 1 micron.Simply decanting, or allowing solids to settle - will not removethe smallest particles.
Description : Solid particles separation based on the difference in their flow velocities through fluids is termed as the (A) Clarification (B) Classification (C) Elutriation (D) Sedimentation
Last Answer : (B) Classification
Description : The process of removing calcium and magnesium from hard water is known as – (1) Sedimentation (2) Filtration (3) Flocculation (4) Water softening
Last Answer : (4) Water softening Explanation: Water softening is the reduction of the concentration of calcium, magnesium, and certain other metal cations in hard water. Hardness ions dissolved in water can cause a ... use depend on an ion-exchange resin in which hardness ions are exchanged for sodium ions.
Description : The main process to purify water by filtration, is (A) Mechanical straining (B) Flocculation and sedimentation (C) Biological metabolism (D) All the above
Last Answer : (D) All the above
Description : The process of removing calcium and magnesium from hard water is known as (1) Sedimentation (2) Filtration (3) Flocculation (4) Water softening
Last Answer : Water softening
Description : Cartridge filters are termed as 'edge' filters, because of the fact that the (A) Disks have very sharp edge (B) Solids are not deposited at the edge of the disk (C) Bulk of the solids are removed at the periphery of the disks (D) None of these
Last Answer : (C) Bulk of the solids are removed at the periphery of the disks
Description : If Organic sources of carcinogenic compounds in water persist even after chlorination, then what is the correct sequence among treatment processes listed below if all these are considered compulsory ? 1. Coagulation 2. Sedimentation 3. Filtration in ... c) 4- 2- 3- 1- 5 and 6 d) 1-5-2-3-4 and 6
Last Answer : d) 1-5-2-3-4 and 6
Description : Separation of materials into products based on the difference of theirsizes is called (A) Sizing (B) Sorting (C) Classification (D) Flocculation
Last Answer : (A) Sizing
Description : During sewage treatment, effluent from which one of the following treatment units has minimum wt/vol amount of suspended solids? (a) Detritus channel (b) Primary sedimentation tank (c) Secondary sedimentation tank (d) Activated sludge process aeration tank
Last Answer : (d) Activated sludge process aeration tank
Description : Coal washing waste water containing about 3% suspended solids (comprising of clay, slate, stone etc.) is treated for solid particles removal (A) By chemical coagulation (B) In sedimentation tanks equipped with mechanical scrapper (C) In vacuum filter (D) In clarifiers
Last Answer : (B) In sedimentation tanks equipped with mechanical scrapper
Description : The function of sedimentation tank in sewage treatment is to: (1) Disinfect the sewage (2) Remove water content (3) Aerate the sewage (4) Remove suspended solids
Last Answer : (4) Remove suspended solids Explanation: The function of sedimentation tank in the sewage treatment is to remove suspended solids.
Description : In primary sedimentation, the 0.2 mm inorganic solids get separated if specific gravity is A. 2.25 B. 2.50 C. 2.55 D. 2.65
Last Answer : ANS: D
Last Answer : Remove suspended solids
Description : __________ are mixed using ribbon blenders. (A) Lumpy solids and low viscosity liquids (B) Dry powders (C) High viscosity liquids (D) Thick pastes
Last Answer : (B) Dry powders
Description : Cyclones are used primarily for separating (A) Solids (B) Solids from fluids (C) Liquids (D) Solids from solids
Last Answer : (B) Solids from fluids
Description : Which of the following is generally considered as opaque surface towards radiations? (A) Gases (B) Solids (C) Liquids (D) Both (B) and (C)
Last Answer : (D) Both (B) and (C)
Description : Hydrometer measures the specific gravity of liquids based on the principles of buoyancy. Pycnometer is used to measure the specific gravity of (A) Powder & granular solids (B) Liquids (C) Low melting point semi-solids (D) All 'a', 'b' & 'c
Last Answer : (D) All 'a', 'b' & 'c
Description : Diaphragm pumps are used to transport (A) Solids (B) Liquids (C) Fluids (D) Slurries
Last Answer : (D) Slurries
Description : Particulate' air pollutants are finely divided solids and liquids. Which of the following is not a ‘particulate’? (A) Dust & mists (B) Smoke & fumes (C) Photochemical smog & soot (D) None of these
Last Answer : (D) None of these
Description : In reactions involving solids and liquids (where change in volume is negligible), the heat of reaction at constant pressure as compared to that at constant volume is (A) More (B) Less (C) Same (D) Unpredictable; depends on the particular reaction
Last Answer : (C) Same
Description : Kopp's rule is used to calculate the heat capacity of (A) Solids (B) Liquids (C) Gases (D) All (A), (B) & (C)
Last Answer : (A) Solids
Description : Dorr thickener is an equipment used for (A) Classification (B) Sedimentation (C) Clarification (D) Leaching
Description : Pick out the true statement pertaining to water treatment. (A) Slow sand filters can remove colour completely (B) Activated carbon can be used for taste & odour control without subsequent filtration ... of water (D) Normally, the turbidity is removed by adding a coagulant prior to sedimentation
Last Answer : (D) Normally, the turbidity is removed by adding a coagulant prior to sedimentation
Description : n a chemical factory where dyes are made, wet cake at 30 OC consisting of 60% moisture is put in a dryer to obtain an output having only 5% moisture, at atmospheric pressure. In each batch about 120 ... dryer and the dryer efficiency is 80%. Latent heat of steam at 4 kg/cm2 is 520 kcal/kg.
Last Answer : Given that Qty of material dried per batch - 120 Kgs Moisture at inlet - 60% a. The quantity of moisture removed per batch. Water quantity in a wet batch - 120 x 0.6 = 72 Kgs. Quantity of bone dry ... - 48/0.95 = 50.5 Kgs. Equivalent water in a dry batch - 50.5 - 48 = 2.5 Kgs.
Description : Coulomb friction is a.Friction between solids and liquids b.Friction between electrically charged bodies c.Friction between lubricated surface d.Friction between dry surfaces e.Friction between bodies having relative motion
Last Answer : d. Friction between dry surfaces
Description : What connections do you have between the reading and your Mixing Solids and Liquids investigation?
Last Answer : well reading is more diffrent then sold and liquid
Description : What is the speed of particles in liquids compared to solids ?
Last Answer : Liquid particles have a higher velocity than solids.
Description : How did you separate the solids from the liquids?
Last Answer : Solids can often be removed from a liquid by filtering theliquid, or by settling, where solids either settle to the bottom orfloat to the top.
Description : What seismic waves can travel through solids and liquids?
Last Answer : What is the answer ?
Description : What can liquids and gases do that solids can not?
Last Answer : Need answer
Description : What is a solution A. a solid dissolved in a gas B. a solute and a solvent C. a liquid dissolved in a gas D. an amalgam of solids, liquids, and gases?
Last Answer : B. A solute and a solvent
Description : Speed of sound is greater in solids than in liquids?
Last Answer : – Because the solids have high elasticity
Description : A fractionating column is a glass apparatus used to (a) Separate magnetic solids from nonmagnetic solids (b) Separate a mixture in water (c) Separate two or more liquids (d) Extract oils from vegetable matter
Last Answer : Ans:(c)
Description : Which of the following statements is not true about triacylglycerols? (a) When solids and semisolids at room temperature, they are called fats. (b) When liquids at room temperature, they are ... low melting points are composed of saturated fatty acids, causing them to be liquids at room temperature
Last Answer : Triacylglycerols with low melting points are composed of saturated fatty acids, causing them to be liquids at room temperature
Description : Which statement is false? (a) Many alkanes are soluble in water. (b) All alkanes have a lower density than water. (c) At room temperature some alkanes are liquids, some solids, some gases. (d) All alkanes burn
Last Answer : Many alkanes are soluble in water
Description : What is the advantage of flash pasteurization? a. It Doesn't Get As Hot b. It Is Faster c. It Is Also Used For Solids, Not Just Liquids d. It Also Sterilizes The Liquid
Last Answer : b. It Is Faster
Description : Why do gases expand faster than liquids and solids?
Last Answer : Because the particles of gases are widely disturbed i.e. their particles are far apart from each other and they free to move. Other
Description : Coulomb friction is the friction between (A) Bodies having relative motion (B) Two dry surfaces (C) Two lubricated surfaces (D) Solids and liquids
Last Answer : (A) Bodies having relative motion
Description : Halitosis and a sour taste in the mouth are signs and symptoms associated most directly with a) esophageal diverticula. Because the diverticula may retain decomposed food, halitosis and a sour ... as heartburn, regurgitation, and dysphagia in many patients while at least 50% are asymptomatic.
Last Answer : a) esophageal diverticula. Because the diverticula may retain decomposed food, halitosis and a sour taste in the mouth are frequent complaints.
Description : Hydrometer is used to determine (A) Specific gravity of liquids (B) Specific gravity of solids (C) Specific gravity of gases (D) Relative humidity
Last Answer : Answer: Option A
Description : Which of the following have the highest thermal conductivities? a. liquids b. gases c. metals d. solids other than metals
Last Answer : metals
Description : Solids and liquids have (a) one value of specific heat (ft) two values of specific heat (c) three values of specific heat (d) no value of specific heat (e) one value under some conditions and two values under other conditions.
Last Answer : Answer : a
Description : Pick out the wrong statement. (A) Recycled coarse material to the grinder by a classifier is termed as circulating load (B) Wear and tear in wet crushing is more than that in dry crushing of ... a pipeline which permits the solids to settle down due to reduction in velocity of the dust laden gas
Last Answer : (C) Size enlargement (opposite of size reduction) is not a mechanical operation