Noise level in a quiet private business office is about _____________ decibels?
Noise level in a quiet private business office is about _____________ decibels?
A. 25
B. 50
C. 70
D. 85
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As per the world health organisation (WHO) specification, the maximum permissible concentration (i.e., TLV) of particulate matter in air is _____________ μg/m3.(μg-microgram)?
As per the world health organisation (WHO) specification, the maximum permissible concentration (i.e., TLV) of particulate matter in air is _____________ μg/m3.(μg-microgram)?A. 10
B. 90
C. 800
D. 750The main pollutant in waste water discharged from a petroleum refinery is oil (both in free and emulsified form). Free oil is removed by_________________?
The main pollutant in waste water discharged from a petroleum refinery is oil (both in free and emulsified form). Free oil is removed by_________________?A. Biological oxygen pond
B. Aerated lagoons
C. Trickling filters
D. Gravity separator having oil skimming devicesTLV of NO2 & NO exposure for the human being is 5 & 25 ppm respectively. Prolonged exposure of human being to NO2 causes_________________?
TLV of NO2 & NO exposure for the human being is 5 & 25 ppm respectively. Prolonged exposure of human being to NO2 causes_________________?A. Skin disorder
B. Bronchitis
C. Bone disease
D. CancerPresence 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 effectFluorosis 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. ArsenicThe Killer gas which caused Bhopal gas tragedy in 1984 was________________?
The Killer gas which caused Bhopal gas tragedy in 1984 was________________?A. Phosgene
B. Methyl isocyanate (MIC)
C. Carbon monoxide
D. Sulphur dioxide