A. 5 – 200 milli-microns
B. 50 – 200 microns
C. 500 – 1000 microns
D. 10 – 50 Angstrom
Related Mcqs:
- 5-200 μm size particles are called__________________?
A. Colloids or aerosols
B. Powder
C. Dust
D. Smoke - 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. - 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 - Basicity [%Cao + %MgO + %SiO2) of the slag in Indian blast furnace is in the range of___________________?
A. 0.7-1.0
B. 1.1-1.4
C. 1.5 – 1.8
D. 2.0 – 2.5 - Brinell Hardness Number (BHN) for talc is approximately in the range of ____________________?
A. 1-5
B. 20-30
C. 100-150
D. 200-250 - The concentration of water vapour in troposphere, which depends upon the altitude & temperature, varies in the range of zero to ______________ percent?
A. 1
B. 4
C. 8
D. 12 - BOD of raw municipal sewage may be in the range of about _____________ mg/litre?
A. 1-2
B. 5-10
C. 150-300
D. 2000-3000 - Maximum work that could be secured by expanding the gas over a given pressure range is the _____________ work?
A. Isothermal
B. Adiabatic
C. Isentropic
D. None of these - The temperature at which a real gas obeys the ideal gas laws over a wide range of pressure is called the ____________ temperature?
A. Critical
B. Boyle
C. Inversion
D. Reduced - The quantity of heat required to evaporate 1 kg of a saturated liquid is called __________________?
A. Specific heat
B. 1 Kcal
C. Sensible heat
D. Latent heat
