Engineering :: Public Health Engineering
|
|
|
|
|
|
| 61. |
The prsence of sodium chloride in water |
| A. |
causes bad taste |
B. |
softens the water |
| C. |
increases hardness of water |
D. |
stops epidemic |
Answer: Option B
Explanation:
|
| 62. |
The presence of calcium and magnesium bi-carbonates in water causes hardness in the water. |
Answer: Option A
Explanation:
|
| 63. |
The sodium carbonate in water |
| A. |
causes bad taste |
B. |
softens the water |
| C. |
increases hardness of water |
D. |
stops epidemic |
Answer: Option B
Explanation:
|
| 64. |
The presence of |
| A. |
iron |
B. |
manganese |
| C. |
sodium fluoride |
D. |
calcium carbonate |
Answer: Option A
Explanation:
|
| 65. |
When manganese is present in water, it reduces the degree of hardness. |
Answer: Option B
Explanation:
|
| 66. |
When lead is present in water, it |
| A. |
changes its colour |
B. |
causes turbidity |
| C. |
causes alkalinity |
D. |
none of these |
Answer: Option D
Explanation:
|
| 67. |
The presence of hydrogen sulphide in water causes |
| A. |
softening |
B. |
alkalinity |
| C. |
aciity |
D. |
bad taste |
Answer: Option C
Explanation:
|
| 68. |
The presence of carbon dioxide in water causes acidity. |
Answer: Option A
Explanation:
|
| 69. |
Turbidity is the measure of resistance to the passage of |
Answer: Option A
Explanation:
|
| 70. |
Turbidity of water is expressed in terms of |
| A. |
silica scale |
B. |
platinum cobalt scale |
| C. |
pO value |
D. |
none of these |
Answer: Option A
Explanation:
|
Read more:
|
|
