Set 2 Practice Mode

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Q2975
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Which device is used to prevent sewer gased from entering the building?
Q2976
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What is the angle between the drains and inspection manhole?
Q2977
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Which pipeline is laid in buildings to take out the sewage under the ground?
Q2978
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Which material is made by PVC pipes?
Q2979
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Which type of trap is used in Indian water closet?