A. Packed scrubber
B. Gravity settling chamber
C. Electrostatic precipitator
D. Hydrocyclone
Related Mcqs:
- Most efficient and suitable dust removal equipment for removal of fly-ash from flue gas in a thermal power plant is the__________________?
A. Gravity settling chamber
B. Cyclone separator
C. Electrostatic precipitator
D. Bag filter - Which of the following fine dust removal equipments is the most efficient ?
A. Bag filter
B. Scrubber
C. Electrostatic precipitator
D. Cyclone separator - 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 - 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 - . 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 - 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 - Waste/polluted water discharged from electroplating, blast furnace and coal mining industries contain mainly _____________ substances?
A. Radioactive
B. Organic
C. Inorganic
D. None of these - Which of the following is the most efficient for removal of very finely divided suspended solids and colloidal matter from the polluted water stream ?
A. Sedimentation tank
B. Circular clarifier
C. Mechanical flocculation
D. Chemical coagulation - Black smoke coming out of the chimney of a furnace is an indication of the use of ______________ in the furnace?
A. Low amount of excess combustion air
B. Large quantity of excess combustion air
C. Hydrocarbon fuel
D. Pulverised coal as fuel - Major sources of noise in furnace operation arises from air inspirators, combustion, side wall vibrations and fluctuation in the process heat load. A 50% increase in fuel firing rate may increase the furnace noise level by about ____________ decibels?
A. 3
B. 30
C. 7
D. 70
