A. Grit
B. Dust
C. Powder
D. Smoke
Related Mcqs:
- 5-200 μm size particles are called__________________?
A. Colloids or aerosols
B. Powder
C. Dust
D. Smoke - Carbonaceous particles having size less than 1 μm are called___________________?
A. Grit
B. Aggregates
C. Aerosols
D. Smoke - Inhalation of silica dust causes a disease called__________________?
A. Bronchitis
B. Silicosis
C. Pneumoconiosis
D. None of these - A shallow pond in which the sewage is retained and biologically treated is called__________________?
A. Oxidation
B. Imhoff tank
C. Lagoon
D. Skimming tank - Color test of water is done with an instrument called__________________?
A. Tintometer
B. Colorimeter
C. Electro-chemical cell
D. Turbidimeter - 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 - 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 - . 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 - 80% less than 200 mesh size particles are called____________________?
A. Smoke
B. Powder
C. Grit
D. Aggregates - Sooty and sulphurous smog formed due to combustion of fossil fuels particularly in winter, continues throughout the day and night. When the moist atmospheric air’s water vapor condenses on the solid particles of smoke thereby forming smog (smoke + fog), it causes_________________?
A. Poor visibility due to sky darkening
B. Irritation in eyes
C. Respiratory trouble
D. All A., B. and C.
