Civil Engineering : Environmental Engineering QUESTIONS AND ANSWERS :: part3 : 21 to 25
Following Civil Engineering Multiple choice objective type questions and answers will help you in BSNL JTO, GATE 2024 and IES 2024 examinations :
21.Which of the following compounds is widely used for algae control ? |
| sodium sulphate |
| copper sulphate |
| sodium chloride |
| calcium chloride |
22.The commonly used material for water supply pipes, which has the properties of being strong, not easily corroded and long life but is heavy and brittle is |
| steel |
| cast iron |
| copper |
| reinforced cement concrete |
23.Double filtration is used |
| to increase the filtration slow sand filters capacity of |
| to increase the filtration rapid sand filters capacity of |
| for isolated buildings like pools, hotels etc swimming |
| all of the above |
24.In lime-soda process |
| only carbonate hardness is removed |
| only non-carbonate hardness is re-moved |
| lime reduces the carbonate hardness and soda-ash removes the non-carbo�nate hardness |
| lime reduces the non-carbonate hard-ness and soda-ash removes the carbo�nate hardness |
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