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Chemical Engineering :: Environmental Engineering

  1. In water treatment plant, zeolite process is used to remove the __________ of water.

  2. A.
    acidity
    B.
    alkalinity
    C.
    hardness
    D.
    iron & zinc

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  3. For existence of aquatic life in water, the dissolved oxygen content in it, should not be less than __________ ppm.

  4. A.
    10000
    B.
    5
    C.
    500
    D.
    1000

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  5. Fresh sewage is __________ in nature.

  6. A.
    acidic
    B.
    neutral
    C.
    alkaline
    D.
    highly acidic

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  7. In a sedimentation tank, the detention period for water ranges from __________ hours.

  8. A.
    2 to 4
    B.
    8 to 12
    C.
    16 to 20
    D.
    24 to 32

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  9. On prolonged exposure to high concentration of carbon monoxide (> 5000 ppm), man dies because

  10. A.
    of clotting of blood.
    B.
    of jamming of respiratory tract.
    C.
    it forms carboxyhaemoglobin by combining with haemoglobin of blood, thereby making it incapable of absorbing oxygen.
    D.
    it forms CO2 by combining with oxygen present in the blood.

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  11. Workers working in __________ industry are most prone to white lung cancer.

  12. A.
    coal mining
    B.
    limestone mining
    C.
    textile
    D.
    asbestos

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  13. A standard test for determination of hardness in water is termed as __________ test.

  14. A.
    EDTA
    B.
    electometric
    C.
    total count
    D.
    presumptive

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  15. TLV of lead for public sewer/waste water is about __________ ppm.

  16. A.
    1
    B.
    25
    C.
    150
    D.
    650

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  17. Presence of nitrates in water in excess of 50 ppm causes

  18. A.
    mathenoglobenemia
    B.
    gastroentetitis
    C.
    asphyxiation
    D.
    tooth decay

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  19. In sewage treatment, the detention period allowed for oxidation ponds ranges from __________ weeks.

  20. A.
    1 to 2
    B.
    4 to 5
    C.
    9 to 10
    D.
    15 to 20

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