Environmental Engineering Degree Jobs Questions - Set 11 - ObjectiveBooks

Environmental Engineering Degree Jobs Questions - Set 11

Practice Test: Question Set - 11

1. The common pollutant generated in chlor-alkali industry and battery manufacture is
    (A) Mercury
    (B) Brine
    (C) Phosphate
    (D) None of these

2. Nitrogen oxides (NOx) is not produced in the __________ industry.
    (A) Nitric acid making
    (B) Nitrogenous fertilizer
    (C) Detergent
    (D) Any of these

3. Permissible safe limit (TLV) of __________ toxic gas is 100-1000 parts per million (ppm).
    (A) Highly
    (B) Moderately
    (C) Extremely
    (D) Very extremely

4. What are the methods of treatment & disposal of radioactive wastes?
    (A) Evaporation & chemical precipitation
    (B) Biological methods & adsorption in ion exchange materials
    (C) Fixing into a solid mass with cement and sinking deep in the sea
    (D) All (a), (b) & (c)

5. Deaeration of high pressure boiler feed water is done to reduce
    (A) Foaming from boilers
    (B) Its dissolved oxygen content
    (C) Its silica content
    (D) Caustic embrittlement

6. Main pollutants released from petroleum refineries is
    (A) CO, SO2 & H2S
    (B) CO2, NO & SO3
    (C) CO2, H2S & NO2
    (D) SO3, NO2 & CO2

7. Which of the following radioactive wastes emits all α, β & γ rays and hence is the most hazardous of all radioactive emitters?
    (A) I-131
    (B) Sr-90
    (C) Au-198
    (D) Ra-226

8. In sewage treatment, its sedimentation is speeded up by commonly adding
    (A) Hydrochloric acid
    (B) Lime
    (C) Copper sulphate
    (D) Sodium sulphate

9. Pick out the correct statement.
    (A) Noise from ball mills can be dealt with by fibre glass lined enclosures
    (B) Noise from vibrating chutes can be reduced by lining the metallic chute with rubber
    (C) Noise of conveyor belt system is reduced by using urethane coated cloth conveyor belts and rubber/plastic covered metallic rollers
    (D) All (a), (b) & (c)

10. Thermal pollution of water increases its toxicity and oxidation of oxygen demanding waste besides favoring bacterial growth. A rise in water temperature by 10°C, doubles the toxic effects of __________ present in it.
    (A) Coal ash
    (B) Potassium cyanide
    (C) Ortho-xylene
    (D) None of these

11. Beyond what concentration of H2S in air, acute danger to human life exists?
    (A) 50 ppm
    (B) 100 ppm
    (C) 300 ppm
    (D) 700 ppm

12. Presence of high concentration of ozone and smog in atmospheric air causes the
    (A) Embrittlement & decrease of folding resistance of paper
    (B) Cracking of rubber products
    (C) Fading of dye on textiles
    (D) Damage of electrical insulator on high tension power line

13. Methyl isocyanate (MIC) gas (TLV <1 ppm), which caused Bhopal gas tragedy in 1984 falls under the category of __________ toxic gas.
    (A) Moderately
    (B) Highly
    (C) Extremely
    (D) Very extremely

14. Which of the following air pollutants is not toxic to vegetation i.e., doesn't cause vegetation damage?
    (A) Smog & ozone
    (B) Hydrogen fluoride & nitrogen oxides
    (C) Sulphur dioxide & spray of weed killers
    (D) Carbon monoxide

15. Carbonaceous particles having size less than 1 μm are called
    (A) Grit
    (B) Aggregates
    (C) Aerosols
    (D) Smoke

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