The hourly variation factor is usually taken as______________?
B. 1.8
C. 2.0
D. 2.7
B. 1.8
C. 2.0
D. 2.7
B. 1.8
C. 2.0
D. 2.7
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Which of the following compounds is widely used for algae control ?
Which of the following compounds is widely used for algae control ?A. sodium sulphate
B. copper sulphate
C. sodium chloride
D. calcium chlorideIf Biochemical oxygen demand (BOD. of a town is 20000 kg/day and BOD per capita per day is 0.05 kg, then population equivalent of town is_________________?
If Biochemical oxygen demand (BOD. of a town is 20000 kg/day and BOD per capita per day is 0.05 kg, then population equivalent of town is_________________?A. 1000
B. 4000
C. 100000
D. 400000Noise emitted by a ventilation fan at a distance of 3 metres is about __________ decibels.
Question: Noise emitted by a ventilation fan at a distance of 3 metres is about __________ decibels.
[A].85 [B].
105 [C].
125 [D].
145 Answer: Option B
Explanation:
No answer description available for this question.
The suitable method for disinfection of swimming pool water is________________?
The suitable method for disinfection of swimming pool water is________________?A. ultra violet rays treatment
B. lime treatment
C. by using potassium permanganate
D. chlorinationMaximum allowable noise exposure limits for a man working for 8 hours a day in a noisy chemical plant is about __________ decibels.
Question: Maximum allowable noise exposure limits for a man working for 8 hours a day in a noisy chemical plant is about __________ decibels.
[A].20 [B].
60 [C].
90 [D].
120 Answer: Option C
Explanation:
No answer description available for this question.
Aerosols present in atmospheric air may be
Question: Aerosols present in atmospheric air may be
[A].positively charged. [B].
negatively charged. [C].
neutral. [D].
combination of all (a), (b) & (c). Answer: Option D
Explanation:
No answer description available for this question.