Civil Engineering : Environmental Engineering QUESTIONS AND ANSWERS :: part3 : 16 to 20
Following Civil Engineering Multiple choice objective type questions and answers will help you in BSNL JTO, GATE 2024 and IES 2024 examinations :
16.Disinfection efficiency is |
| reduced at higher pH value of water |
| unaffected by pH value of water |
| increased at higher pH value of water |
| highest at pH value equal to 7 |
17.Activated carbon is used for |
| disinfection |
| removing hardness |
| removing odours |
| removing corrosiveness |
18.The layout of distribution system in which water flows towards the outer periphery is |
| ring system |
| dead end system |
| radial system |
| grid iron system |
19.The disinfection efficiency of chlorine increases by i) decreasing the time of contact ii) decreasing the temperature of water iii) increasing the temperature of water The correct answer is |
| only (i) |
| both (i) and (ii) |
| both (i) and (iii) |
| only (iii) |
20.The suitable layout of distribution system for a city with roads of rectangular pattern is |
| grid iron system |
| dead end system |
| ring system |
| radial system |
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