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    • ( 1 ) For maximum alkalinity of water, pH value should be

    • 1) more than 7
    • 2) zero
    • 3) less than 7
    • 4) 14
    • Discussion in forum
      Answer : 4) 14
      Solution : For maximum alkalinity of water, pH value should be 14








      discussion


      Answer : 4) 14

    • ( 2 ) The intensity of rain is expressed in

    • 1) cm/minute
    • 2) cm/hour
    • 3) cm/day
    • 4) None of these
    • Discussion in forum
      Answer : 2) cm/hour
      Solution : The intensity of rain is expressed in cm/hour








      discussion


      Answer : 2) cm/hour

    • ( 3 ) The water temperature should preferably be less than __ degree Celsius.

    • 1) 10
    • 2) 15
    • 3) 20
    • 4) 25
    • Discussion in forum
      Answer : 4) 25
      Solution : The water temperature should preferably be less than 25 degree Celsius.








      discussion


      Answer : 4) 25

    • ( 4 ) Quality of water is said to be good if it is

    • 1) free from pathogenic organism
    • 2) colourless
    • 3) tasteless
    • 4) all
    • Discussion in forum
      Answer : 4) all
      Solution : Quality of water is said to be good if it is ree from pathogenic organism, colourless and tasteless.








      discussion


      Answer : 4) all

    • ( 5 ) The coagulant which is generally not used for treating the sewage, is

    • 1) Alum
    • 2) Ferric chloride
    • 3) Ferric sulphate
    • 4) Chlorinated coppers
    • Discussion in forum
      Answer : 1) Alum
      Solution : The coagulant which is generally not used for treating the sewage, is Alum








      discussion


      Answer : 1) Alum

    • ( 6 ) The sewage treatment in septic tanks is due to

    • 1) anaerobic decomposition
    • 2) aerobic decomposition
    • 3) parasitic decomposition
    • 4) None of these
    • Discussion in forum
      Answer : 1) anaerobic decomposition
      Solution : The sewage treatment in septic tanks is due to anaerobic decomposition








      discussion


      Answer : 1) anaerobic decomposition

    • ( 7 ) Hard water for public water supply is discarded because

    • 1) it contains pathogenic bacterias
    • 2) it possesses bad taste and odour
    • 3) it contains lot of turbidity
    • 4) it consumes more soap
    • Discussion in forum
      Answer : 4) it consumes more soap
      Solution : Hard water for public water supply is discarded because it consumes more soap








      discussion


      Answer : 4) it consumes more soap

    • ( 8 ) The maximum permitted loss of head in a rapid sand filter, is

    • 1) 4m
    • 2) 1m
    • 3) 2m
    • 4) 3m
    • Discussion in forum
      Answer : 4) 3m
      Solution : The maximum permitted loss of head in a rapid sand filter, is 3m








      discussion


      Answer : 4) 3m

    • ( 9 ) The average domestic consumption under normal conditions in an Indian city per day per person, is

    • 1) 105 litres
    • 2) 115 litres
    • 3) 125 litres
    • 4) 135 litres
    • Discussion in forum
      Answer : 4) 135 litres
      Solution : The average domestic consumption under normal conditions in an Indian city per day per person, is 135 litres








      discussion


      Answer : 4) 135 litres

    • ( 10 ) Underground water is obtained from

    • 1) rains
    • 2) rivers
    • 3) lakes
    • 4) reservoirs
    • Discussion in forum
      Answer : 5) springs
      Solution : Underground water is obtained from springs








      discussion


      Answer : 5) springs





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