Carcinogenic air pollutants cause__________________?
A. Bone decay
B. Cancer
C. Asphyxiation (suffocation)
D. Anemia
Chemical Environmental Engineering
The resistance of water to the passage of light through it is a measure of the___________________?
The resistance of water to the passage of light through it is a measure of the___________________?
A. Turbidity
B. Color
C. Hardness
D. Dissolved gases
Polyvinyl chloride containers are not suitable for storing_________________?
Polyvinyl chloride containers are not suitable for storing_________________?
A. Foodstuffs
B. Woolen clothes
C. Metallic powder
D. None of these
Fresh domestic sewage is _______________ in color?
Fresh domestic sewage is _______________ in color?
A. Grey
B. Dark brown
C. Red
D. Black
Aerosols present in atmospheric air may be__________________?
Aerosols present in atmospheric air may be__________________?
A. Positively charged
B. Negatively charged
C. Neutral
D. Combination of all A., B. & C.
Noise level inside a jet airliner in normal flight is about ______________ decibels?
Noise level inside a jet airliner in normal flight is about ______________ decibels?
A. 80
B. 100
C. 125
D. 150
A considerable part of the harmful ultraviolet radiation of the sum does not reach the earth surface, because of the fact that, there is a layer of _____________ high above earth’s atmosphere, which absorbs it?
A considerable part of the harmful ultraviolet radiation of the sum does not reach the earth surface, because of the fact that, there is a layer of _____________ high above earth’s atmosphere, which absorbs it?
A. Hydrogen
B. Carbon dioxide
C. Ozone
D. None of these
Fluorosis is caused due to the presence of excessive amount of ______________ in drinking water?
Fluorosis is caused due to the presence of excessive amount of ______________ in drinking water?
A. Mercury
B. Lead
C. Fluoride
D. Arsenic
Presence of carbon monoxide in atmosphere produced by decomposition of chlorophyll and haemoglobin breakdown of some animals, beyond TLV (>50 ppm) ?
Presence of carbon monoxide in atmosphere produced by decomposition of chlorophyll and haemoglobin breakdown of some animals, beyond TLV (>50 ppm) ?
A. Acts as a green house gas thereby raising earth’s temperature
B. Causes asphyxia
C. Causes increase in sea level
D. Enhances the green house effect
Soluble silica present in boiler feed water can be removed by______________________?
Soluble silica present in boiler feed water can be removed by______________________?
A. Coagulation
B. Filtration
C. Anion exchanger
D. Preheating it