1. | Which of the following forms of water is the most contaminated? |
a. | Underground water |
b. | Rainwater |
c. | Surface water |
d. | Water stored in ice caps |
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Answer: (c).Surface water
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2. | Alum is used for which of the following purification process? |
a. | Sedimentation |
b. | Filtration |
c. | Disinfection |
d. | Ozonation |
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Answer: (a).Sedimentation
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3. | The potability of water can be checked by sanitary surveys. |
a. | True |
b. | False |
c. | May be |
d. | Can't say |
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Answer: (b).False
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4. | The coliform group of bacteria includes all the __________________ bacilli |
a. | aerobic |
b. | anaerobic |
c. | aerobic,non-sporulating |
d. | aerobic,Gram-negative,non-sporulating |
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Answer: (d).aerobic,Gram-negative,non-sporulating
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5. | Which of the following organism does not belong to coliform group of bacteria? |
a. | Salmonella |
b. | Serratia |
c. | Enterobacter |
d. | Proteus |
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Answer: (c).Enterobacter
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