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Environmental Engineering Test 1
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  • Question 1/9
    1 / -0
    A 50 ml odorous water sample is mixed with freshwater and total volume of the mix is 500 ml when the odour is hardly detectable. The Threshold odour number is ____
  • Question 2/9
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    Match List I (Water Quality Parameter) with List – II (Tests)

    List I (Water Quality Parameter)

    List II (Tests)

    A) Hardness

    1) Winkler method

    B) Chlorine

    2) EDTA method

    C) Dissolved Oxygen

    3) Orthotolodine test

    D) Chloride

    4) Mohr method

  • Question 3/9
    1 / -0

    Match List I (Industry/ Institution type) with List II (Water needed) and select the correct code:

     

    List I

     

    List II

    A.

    Schools

    1.

    80-200 kL/tonne/day

    B.

    Paper industry

    2.

    200-400 kL/tonne/day

    C.

    Hospitals

    3.

    45-135 lpcd

    D.

    Domestic

    4.

    340-450 lpcd

     

     

    5.

    135-225 lpcd

  • Question 4/9
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    The average daily demand of water in a region is 140 lpcd, and the fire demand is 10 lpcd. The coincident draft is
  • Question 5/9
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    If the pH of solution A is 6 and that of solution B is 8 and 1 ℓ of each solution is mixed thoroughly and stirred the pH of the new mixture is (correct up to one decimal place)
  • Question 6/9
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    Results of a water sample  analysis are as follows:

    Species

    Concentration (meq/L)

    Chloride

    15

    Carbonate \(\left( {CO_3^{2 - }} \right)\)

    15

    Bicarbonate \(\left( {HCO_3^ - } \right)\)

    20

    Calcium (Ca2+)

    30

    Magnesium (Mg2+)

    12

    Aluminium (Al3+)

    13

     

    The total hardness in mg/L as CaCO3 is ________

  • Question 7/9
    1 / -0

    The population of a town in the various year is shown below:

    Year

    Population

    1960

    50000

    1970

    60000

    1980

    75000

    1990

    92000


    The predicted population in 2010 using geometric increase method is:
  • Question 8/9
    1 / -0

    The analysis of a water sample for MPN calculation in Multiple Tube Fermentation Test is given below:

    Size of the sample (ml)

    Number of (+)ve tubes

    Number of (-)ve tubes

    1

    4

    1

    0.1

    3

    2

    0.01

    3

    2

    0.001

    0

    5

     

    The MPN using the Thomas equation is 

  • Question 9/9
    1 / -0
    A 800 ml solution of 0.1 M H2SO4 is diluted with 200 ml distilled water, then the normality of the new obtained solution is:
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