A man exposed to excessive noise level in the working environment may suffer from
A. Hearing loss
B. Rupture of ear drum
C. Nervousness & fatigue
D. All of the above
Answer: Option D
A. Hearing loss
B. Rupture of ear drum
C. Nervousness & fatigue
D. All of the above
Answer: Option D
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
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