Engineering :: Public Health Engineering
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71. |
The colour of water is expressed in numbers of a |
A. |
silica scale |
B. |
platinum cobalt scale |
C. |
pO value |
D. |
none of these |
Answer: Option B
Explanation:
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72. |
The odour of water can be determined by |
A. |
thermometer |
B. |
Osmoscope |
C. |
Jackson's turbidimeter |
D. |
none of these |
Answer: Option B
Explanation:
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73. |
The odour of water does not change with the temperature. |
Answer: Option B
Explanation:
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74. |
The commercial osmoscope is graduated with pO values from |
A. |
0 to 5 |
B. |
5 to 10 |
C. |
10 to 15 |
D. |
15 to 20 |
Answer: Option A
Explanation:
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75. |
When the pO value of water is 5, then it has |
A. |
no perceptible odour |
B. |
distinct odour |
C. |
faint odour |
D. |
extremely strong odour |
Answer: Option D
Explanation:
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76. |
The maximum permissible temperature for domestic supply is |
A. |
5 to 10?C |
B. |
10 to 15?C |
C. |
15 to 20?C |
D. |
20 to 25?C |
Answer: Option B
Explanation:
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77. |
The maximum permissible colour for domestic supplies, on platinum cobalt scale is |
A. |
5 to 10 ppm |
B. |
10 to 20 ppm |
C. |
20 to 30 ppm |
D. |
30 to 40 ppm |
Answer: Option B
Explanation:
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78. |
Odours and tastes may result due to the prsence of |
A. |
micro-organisms either dead or alive |
B. |
dissolved gases such as oxygen, carbon dioxide, methane etc. |
C. |
mineral substances such as sodium chloride, iron compounds etc. |
D. |
all of the above |
Answer: Option D
Explanation:
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79. |
The maximum permissible turbidity for domestic supplies, on silica scale is |
A. |
5 to 10 ppm |
B. |
10 to 20 ppm |
C. |
20 to 30 ppm |
D. |
30 to 40 ppm |
Answer: Option A
Explanation:
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80. |
High turbidity of water can be determined by |
A. |
turbidity tube |
B. |
Jacksons turbidimeter |
C. |
Baylis turbidimeter |
D. |
Hellipe turbidimeter |
Answer: Option B
Explanation:
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