The optimum temperature for bacterial activity is in what range?
A) 25-35 degree Celsius
B) 50 degree Celsius
C) 20 degree Celsius
D) 40 degree Celsius
Correct Answer:
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Q15: _ are constructed for water supply, electricity
Q16: What is the next step after water
Q17: Which of the following requires aesthetically pleasant
Q18: The addition of substances or energy forms
Q19: What is the type of pollution where
Q20: What percentage of solids does wastewater contain?
A)0.5%
B)5%
C)0.1%
D)1%
Q21: What is the growth of huge amounts
Q23: The fluoride concentration for prevention of dental
Q24: In which process, the fluoride content of
Q25: Which of the following is not used
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