Browsing category
Inhalation of lead compounds present in automobile exhaust (using leaded petrol) causes__________________? A. Blood poisoning B. Anaemia C. Nervous system disorderD. All A., B. & C.
Higher concentration of CO2 in atmosphere_____________________? A. Allows visible solar radiation (ultraviolet) of short wave-length to pass through B. Reflects and absorbs the longer wavelength (infra-red) radiations C. Prevents solar heat being radiated out completely, resulting in ‘heat trap’ i.e., global warmingD. All A., B. and C.
Which of the following is the common pollutant emitted from metallurgical smelters, thermal power plant and cement plants ? A. NOx B. HgC. SO2 D. F
80% less than 200 mesh size particles are called____________________? A. SmokeB. Powder C. Grit D. Aggregates
High noise level in a chemical plant can be controlled by the_________________? A. Suppression of noise at the source itself B. Path control of noise C. Protection of operating personnelD. All A., B. & C.
World’s worst radioactive pollution was caused by nuclear reactor disaster which occured in ___________________? A. Arizona (U.S.A.)B. Chernobyl (undivided U.S.S.R.) C. Pennsylvania (U.S.A.) D. Moscow (U.S.S.R.)
Exposure to chemicals having carcinogenic properties cause ____________________? A. Dermatitis (skin disorder)B. Cancer C. Asphyxiation (suffocation) D. Asthma
Maximum permissible limit of industrial noise as recommended by World Health Organisation (WHO) is _____________ decibels? A. 35B. 75 C. 95 D. 105
COD of raw municipal sewage may be in the range of about _____________ mg/litre? A. 1-2 B. 5-10C. 90-120 D. 1500-2500
‘Pneumoconiosis’ is a disease caused by the inhalation of ______________ dust? A. Coal B. Uranium ore C. Iron ore D. Lime