Set 3 Practice Mode

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Q2980
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What is the first stage in sewage treatment process?
Q2981
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What is the term for water inside trap which prevents gas from entering?
Q2982
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What is the name of the appurtenance that are constructed at suitable intervals?
Q2983
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What is the type of manhole having a depth greater than 1.5 m is called?
Q2984
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What is the nominal shape of septic tank?