Description : Which of the following dust collection equipments is the least efficient (for sub-micronic particles)? (A) Dust catcher (gravity type) (B) Cyclone separator (C) Bag filter (D) Hollow wet scrubber
Last Answer : (A) Dust catcher (gravity type)
Description : . The most suitable equipment for removing the fine dust particle (< 1 micron dia.) from air below its dew point will be a/an (A) Bag filter (B) Electrostatic precipitator (C) Cyclone separator (D) Wet scrubber
Last Answer : (B) Electrostatic precipitator
Description : Which of the following fine dust removal equipments is the most efficient? (A) Bag filter (B) Scrubber (C) Electrostatic precipitator (D) Cyclone separator
Last Answer : (C) Electrostatic precipitator
Description : Most efficient and suitable dust removal equipment for removal of flyash from flue gas in a thermal power plant is the (A) Gravity settling chamber (B) Cyclone separator (C) Electrostatic precipitator (D) Bag filter
Description : In large thermal power stations very fine particulates present in flue gas are removed by (A) Wet scrubber (B) Bag filter (C) Electrostatic precipitators (D) Dust catcher
Last Answer : (C) Electrostatic precipitators
Description : Dust laden air can be purified using a (A) Cyclone separator (B) Bag filter (C) Gravity settler (D) Tubular centrifuge
Last Answer : (A) Cyclone separator
Description : The most efficient equipment for the removal of sub-micronic dust particles from blast furnace gas is the (A) Venturi atomiser (B) Gravity settling chamber (C) Electro-static precipitator (D) Cyclone separator
Last Answer : (C) Electro-static precipitator
Description : Traces of tar fog present in the coke oven gas is removed by (A) Cyclone separator (B) Wet packed scrubber (C) Electrostatic precipitator (D) Washing with monoethanolamine
Description : Dorr thickener is an equipment used for (A) Classification (B) Sedimentation (C) Clarification (D) Leaching
Last Answer : (B) Sedimentation
Description : Which of the following does not discharge the dust collected as a dry solid? (A) Electrostatic precipitator (B) Wet scrubber (C) Bag filter (D) Gravity settling chamber
Last Answer : (B) Wet scrubber
Description : __________ is used for producing a thick suspension from a thin slurry. (A) Cartridge filter (B) Rotary drum vacuum filter (C) Pressure filter thickener (D) Plate and frame filter press
Last Answer : (C) Pressure filter thickener
Description : In the cyclone separator used for separation of dust from dust laden gas, the gas (A) Enters the cyclone from the top (B) Is admitted tangentially at high velocity (C) Develops a helical motion inside the chamber (D) Both (B) and (C
Last Answer : (D) Both (B) and (C
Description : Operating principle of cyclone separator is based on the action of __________ dust particles. (A) Diffusion of (B) Centrifugal force on (C) Gravitational force on (D) Electrostatic force on
Last Answer : (B) Centrifugal force on
Description : Dust collection efficiency of a cyclone separator depends upon its (A) Diameter (B) Inlet gas velocity (C) Overall height (D) All (A), (B) & (C)
Last Answer : (D) All (A), (B) & (C)
Description : Hydro-cyclone is a (A) Crusher (B) wet classifier (C) Dry classifier (D) Magnetic separator
Last Answer : (B) wet classifier
Description : Metallic wire mesh is used as a filtering medium for the separation of dust from dust laden gas in case of a/an (A) Air filter (B) Bag filter (C) Venturi scrubber (D) Hydrocyclones
Last Answer : (A) Air filter
Description : Which of the following will be unsuitable for dust cleaning from flue gas at 400°C from a pulverised coal fired boiler? (A) Multicyclones (B) Bag filter (C) Wet scrubber (D) Hydrocyclones
Last Answer : (B) Bag filter
Description : Which is the most efficient dust removal equipment for removal of submicronic dust particles from blast furnace gas? (A) Packed scrubber (B) Gravity settling chamber (C) Electrostatic precipitator (D) Hydrocyclone
Description : Gravity settling process is not involved in the working of a (A) Hydrocyclone (B) Classifier (C) Dorr-thickener (D) Sedimentation tank
Last Answer : (A) Hydrocyclone
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
Description : Removal of activated carbon from glycerine is done by (A) Plate and frame filter (B) Rotary vacuum filter (C) Batch basket centrifuge (D) None of these
Last Answer : (A) Plate and frame filter
Description : Which of the following is a vacuum filter? (A) Filter press (B) Rotary disc filter (C) Batch basket centrifuge (D) Tank filter (Nutsche filter)
Last Answer : (B) Rotary disc filter
Description : Traces of liquid tar fog present in coke oven gas is separated using (A) Electrostatic precipitator (B) Cyclone separator (C) Strainer (D) None of these
Last Answer : (A) Electrostatic precipitato
Description : Close circuit grinding by a ball mill with air sweeping employs a (A) Classifier (B) Cyclone separator between mill & classifier (C) Both (A) & (B) (D) Neither (A) nor (B)
Last Answer : (C) Both (A) & (B)
Description : Particle size range in which dust catcher (gravity settling chamber) works most effectively and efficiently is __________ microns. (A) < 5 (B) 10 to 25 (C) < 74 (D) > 1000
Last Answer : (C) < 74
Description : Write short note on i. Cyclone separator. ii. Fluidized bed dryer.
Last Answer : Cyclone Separator Principle: Centrifugal force Construction1) Cyclone separator is size separation device 2) It consists of a cylindrical vessel with a conical base. 3) The upper part of ... are produced 3) High friction between practices generate electrostatic charges. Diagram:
Description : Describe the principle, construction, working and uses of cyclone separator.
Last Answer : Principle: Centrifugal force Construction- 1) Cyclone separator is size separation device 2) It consists of a cylindrical vessel with a conical base. 3) The upper part of the vessel is fitted ... the suspension of a solid in gas 2. It can be used with liquid suspension of solid
Description : Explain the construction and working of cyclone separator.
Last Answer : Construction: It consists of cylindrical vessel with a conical base. In upper part of vessel is fitted with a tangential inlet and fluid outlet. At the base it is fitted with solid outlet. ... solids are thrown out to the wall and fall to the conical base for discharge. Diagram
Description : Explain construction and working of cyclone separator with a well labelled diagram.
Description : Explain the working of cyclone separator with labelled diagram.
Last Answer : Cyclone separator: Working: Cyclone separators work much like a centrifuge, but with a continuous feed of dirty air. In a cyclone separator, dirty flue gas is fed into a chamber. The inside ... at the bottom of the container. The cleaned flue gas escapes out the top of the chamber.
Description : 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 (A) Disc bowl centrifuge (B) Sharpies super-centrifuge (C) Batch basket centrifuge
Last Answer : (A) Disc bowl centrifuge
Description : Which of the following is the most suitable for cleaning of fine coal dust (
Last Answer : (D) Froth floatation
Description : Pick out the wrong statement. (A) A slight haze at the top of chimney indicates good combustion in the furnace (B) A bag filter incurs very small pressure drop and is very efficient for ... dust collection equipment for removal of submicronic dust particles present in flue gas (D) None of these
Last Answer : (B) A bag filter incurs very small pressure drop and is very efficient for removal of submicronic dust particles from flue gases at very high temperature
Description : Sedimentation on commercial scale occurs in (A) Classifiers (B) Thickeners (C) Rotary drum filters (D) Cyclones
Last Answer : (C) Rotary drum filters
Description : Cement Kiln is a (A) Rotary Kiln (B) Tunnel Kiln (C) Natural draft furnace (D) Batch furnace
Last Answer : (A) Rotary Kiln
Description : Which of the following is the treatment of water pollution? (1) Bag house filter (2) Windrow composting (3) Venturi scrubber (4) Reverse Osmosis
Last Answer : (4) Reverse Osmosis Explanation: Reverse osmosis (RO) is a water purification technology that uses a semipermeable membrane to remove ions, molecules, and larger particles from drinking water. It can ... of potable water. It is most commonly known for its use in drinking water purification form.
Last Answer : Reverse Osmosis
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 : Cooling water is required for following equipment in ammonia absorption plant (a) condenser (b) evaporator (c) condenser and absorber (d) condenser, absorber and separator (rectifier).
Last Answer : Ans: d
Description : Basic components of sprayer. a. Nozzle body b. Nozzle boss c. Filter d. Spray gun e. All of the above
Last Answer : All of the above
Description : __________ employs a set of screen across a flow channel for the separation of dirt/rust from a flowing liquid stream. (A) Thickener (B) Classifier (C) Strainer (D) Clarifier
Last Answer : (C) Strainer
Description : Suspended solid present in the waste water generated in blast furnace gas cooling and cleaning plant is removed by (A) Biological oxygen pond (B) Radial settling tank (thickener) using coagulant (lime & ferrous sulphate) (C) Lagoons (D) Filtration
Last Answer : (B) Radial settling tank (thickener) using coagulant (lime & ferrous sulphate)
Description : The speed of a rotary drum vacuum filter may be about __________ rpm. (A) 1 (B) 50 (C) 100 (D) 500
Last Answer : (A) 1
Description : With increase in drum speed, in a rotary drum filter, the filtration rate (A) Increases (B) Increases linearly (C) Decreases (D) Is not affected
Last Answer : (A) Increases
Description : For classification of potable (drinking) water, we use a __________ filter. (A) Gravity sand (B) Plate and frame (C) Vacuum leaf (D) Rotary vacuum
Last Answer : (A) Gravity sand
Description : For removal of very small amounts of precipitate from large volume of water, the most suitable filter is the __________ filter. (A) Plate & frame (B) Shell & lea (C) Sand (D) Rotary vacuum
Last Answer : (C) Sand
Description : For separation of sugar solution from settled out mud, we use a __________ filter. (A) Sparkler (B) Plate and frame (C) Centrifugal (D) Rotary drum vacuum
Last Answer : (C) Centrifugal
Description : Moore filter is a __________ filter. (A) Leaf (B) Press (C) Rotary (D) Sand
Last Answer : (A) Leaf
Description : Vacuum is applied in __________ zone, in case of a general type continuous rotary drum vacuum filter. (A) Filtering (B) Washing (C) Drying (D) All (A), (B) & (C)
Description : The controlling resistance in a rotary drum vacuum filter is the __________ resistance. (A) Piping (B) Cake (C) Filter medium (D) None of these
Last Answer : (B) Cake