Engineering :: Environmental Engineering
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1. |
Disinfection of drinking water means removal of |
A. |
Turbidity |
B. |
Colour |
C. |
Odour |
D. |
Oxygen |
E. |
Bacteria |
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Answer: Option E
Explanation:
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2. |
Disinfection of water is done by |
A. |
Filtration |
B. |
Alum |
C. |
Ozone |
D. |
Heating and cooling |
E. |
Passing chlorine |
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Answer: Option E
Explanation:
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3. |
The aeration of water is done for the removal of |
A. |
Colour |
B. |
Turbidity |
C. |
Bacteria |
D. |
Odour |
E. |
Hardness |
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Answer: Option D
Explanation:
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4. |
For controlling the growth of algae, the chemical generally used is |
A. |
Alum |
B. |
Lime |
C. |
Bleaching powder |
D. |
Copper sulphate |
E. |
Ozone |
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Answer: Option D
Explanation:
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5. |
For removal of temporary hardness of water |
A. |
Water is filtered |
B. |
Water is boiled |
C. |
Alum is added to water |
D. |
Lime is added to water |
E. |
Chlorine is passed through water |
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Answer: Option C
Explanation:
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6. |
The presence of algae in water indicates that the water is |
A. |
Hard |
B. |
Soft |
C. |
Acidic |
D. |
Pune |
E. |
Free from turbidity |
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Answer: Option C
Explanation:
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7. |
For portable water the permissible pH value is |
A. |
1 - 4.5 |
B. |
4.5 - 7 |
C. |
7 - 8.5 |
D. |
9 -- 11 |
E. |
11 -- 14 |
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Answer: Option C
Explanation:
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8. |
The desirable temperature of portable water is |
A. |
zero degree centigrade |
B. |
10?C |
C. |
20?C |
D. |
27?C |
E. |
37?C |
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Answer: Option B
Explanation:
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9. |
The hardness limit for portable water ranges between |
A. |
10 - 50 ppm |
B. |
50 - 65 ppm |
C. |
75 - 117 ppm |
D. |
150 - 250 ppm |
E. |
300 - 700 ppm |
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Answer: Option C
Explanation:
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10. |
The maximum permissible turbidity for drinking water |
A. |
Zero |
B. |
1 - 4 ppm |
C. |
15 - 25 ppm |
D. |
3 - 50 ppm |
E. |
30 - 50 ppm |
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Answer: Option C
Explanation:
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