Carcinogenic air pollutants cause__________________?
Carcinogenic air pollutants cause__________________?
A. Bone decay
B. Cancer
C. Asphyxiation (suffocation)
D. Anemia
Chemical Environmental Engineering
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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