Environmental Engineering GATE Questions with Answers - Set 18 - ObjectiveBooks

Environmental Engineering GATE Questions with Answers - Set 18

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

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