TLV of ammonia, nitrogen dioxide and phenol vapor in air is __________ ppm.
A. 5
B. 100
C. 1000
D. 2000
Answer: Option A
This Question Belongs to Chemical Engineering >> Environmental Engineering In CE
Related Questions on Environmental Engineering in CE
Fluorosis is caused due to the presence of excessive amount of __________ in drinking water.
A. Mercury
B. Lead
C. Fluoride
D. Arsenic
Smog is not formed due to the presence of __________ in the atmosphere.
A. SO2
B. NOx
C. CO2
D. Any of these
Dose of chlorine for disinfection of water is about __________ mg/litre of water.
A. 0.01
B. 0.1
C. 0.3
D. 1
Join The Discussion