Practice Test: Question Set - 18
1. 'Pneumoconiosis' is a disease caused by the inhalation of __________ dust.
- (A) Coal
- (B) Uranium ore
- (C) Iron ore
- (D) Lime
2. Which of the following acts as a natural source of air pollution?
- (A) Forest fire
- (B) Deforestation
- (C) Volcanic eruption
- (D) None of these
3. COD of raw municipal sewage may be in the range of about __________ mg/liter.
- (A) 1-2
- (B) 5-10
- (C) 90-120
- (D) 1500-2500
4. Exposure to small amount of __________ results in high blood pressure & heart disease in human beings.
- (A) Hydrogen sulphide
- (B) Mercury
- (C) Cadmium
- (D) Asbestos
5. Maximum permissible limit of industrial noise as recommended by World Health Organization (WHO) is __________ decibels.
- (A) 35
- (B) 75
- (C) 95
- (D) 105
6. Noise level during normal conversation among men is about __________ decibels.
- (A) 10
- (B) 45
- (C) 90
- (D) 115
7. Exposure to chemicals having carcinogenic properties cause
- (A) Dermatitis (skin disorder)
- (B) Cancer
- (C) Asphyxiation (suffocation)
- (D) Asthma
8. Ionization potential employed in the industrial electrostatic precipitator is of the order of
- (A) 30 to 70 kV DC
- (B) 30 to 70 kV AC
- (C) 230 V AC
- (D) 230 V DC
9. World's worst radioactive pollution was caused by nuclear reactor disaster which occurred in
- (A) Arizona (U.S.A.)
- (B) Chernobyl (undivided U.S.S.R.)
- (C) Pennsylvania (U.S.A.)
- (D) Moscow (U.S.S.R.)
10. Phenolic water generated in coke ovens & by-product plant attached to an integrated steel plant containing phenol in concentration of less than 100 mg/liter can be removed by
- (A) Chlorination
- (B) Treating in biological oxygen pond
- (C) Chemical coagulation
- (D) None of these
11. 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 personnel
- (D) All (a), (b) & (c)
12. Industrial workers working in leather tanning & manufacturing units are prone to suffer from
- (A) Respiratory ailments (e.g. bronchitis)
- (B) Skin diseases (e.g. dermatitis)
- (C) Silicosis
- (D) Blurred vision
13. 80% less than 200 mesh size particles are called
- (A) Smoke
- (B) Powder
- (C) Grit
- (D) Aggregates
14. __________ substances present in sewage are removed in grit chamber during sewage treatment.
- (A) Organic
- (B) Fatty
- (C) Inorganic
- (D) Dissolved
15. Which of the following is the common pollutant emitted from metallurgical smelters, thermal power plant and cement plants?
- (A) NOx
- (B) Hg
- (C) SO2
- (D) F
Next Tests: