Environmental Engineering Air Pollution MCQ Questions - Set 05 - ObjectiveBooks

Environmental Engineering Air Pollution MCQ Questions - Set 05

Practice Test: Question Set - 05

1. Photochemical smog is formed from automobile exhaust
    (A) By reaction of hydrocarbon & nitric oxide in presence of sunlight
    (B) Appears only on sunny days
    (C) Is harmful for crops and trees also besides causing eye irritation & asthma
    (D) All (a), (b) & (c)

2. Green house gases blanket/block the infrared radiation from earth's surface to the atmosphere leading to its progressive warming up. Which of the following gases does not exhibit green house effect?
    (A) CO2
    (B) H2
    (C) SO3
    (D) N2

3. Which of the following is not a source of ozone emission in the atmosphere?
    (A) Refrigerators
    (B) Xerox machines
    (C) Dermatological photo-therapy equipments
    (D) High voltage electrical equipments

4. Which of the following is an adsorbent for removal of nitrogen oxides from gas/air?
    (A) Active carbon
    (B) Silica gel
    (C) Bog iron (iron oxide)
    (D) Pulverised limestone

5. Ringelmann chart is used for the evaluation of __________ pollution.
    (A) Air
    (B) Water
    (C) Noise
    (D) Radioactive

6. The effect of increase in carbon dioxide level of the atmosphere and its profound effect on our climate is called the
    (A) Catalytic conversion
    (B) Green house effect
    (C) Global warming
    (D) Both (b) and (c)

7. Inorganic impurities causing water pollution is
    (A) Fats
    (B) Carbohydrates
    (C) Salts of metals
    (D) Protein

8. Which of the following is not a practical method of low level radioactive waste disposal?
    (A) Dilution with inert material
    (B) Discharging to atmosphere through tall stacks after dilution
    (C) Disposing off in rivers & oceans
    (D) Filling in steel crates and shooting it off out of earth's gravity

9. In a sedimentation tank, the detention period for water ranges from __________ hours.
    (A) 2 to 4
    (B) 8 to 12
    (C) 16 to 20
    (D) 24 to 32

10. Disinfection of water is done to destroy pathogenic bacteria and thus prevent water-borne diseases. Disinfection of water may be done by the use of
    (A) Ozone and iodine
    (B) Chlorine or its compounds
    (C) Ultraviolet light for irradiation of water
    (D) All (a), (b) & (c)

11. Inhalation of silica dust by human being during hand drilling in mica mining, lead & zinc mining, silica refractory manufacture and in foundries causes
    (A) Asphyxiation (suffocation)
    (B) Shortness of breath
    (C) Tuberculosis
    (D) All (a), (b) and (c)

12. Global warming may result in
    (A) Flood
    (B) Cyclone
    (C) Decrease in food productivity
    (D) All (a), (b) and (c)

13. Maximum permissible residual chlorine in treated water should be __________ mg/liter.
    (A) 0.001 to 0.01
    (B) 0.2 to 0.3
    (C) 2 to 3
    (D) 5 to 10

14. Ringelmann chart No. 2 corresponds to __________ percent black smoke.
    (A) 10
    (B) 20
    (C) 40
    (D) 80

15. The maximum permissible noise level to which a man working in a chemical plant can be exposed for eight hours per day is about __________ decibels.
    (A) 60
    (B) 90
    (C) 105
    (D) 120

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