Standard BOD is measured at________________?
B. 25°C- 3day
C. 20°C – 5day(Correct)
D. 30°C- 5day
B. 25°C- 3day
C. 20°C – 5day(Correct)
D. 30°C- 5day
B. 25°C- 3day
C. 20°C – 5day(Correct)
D. 30°C- 5day
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As compared to geometrical increase method of forecasting population, arithmetical increase method gives________________?
As compared to geometrical increase method of forecasting population, arithmetical increase method gives________________?A. lesser value
B. higher value
C. same value
D. accurate valueThe water carriage system of collection of waste product________________?
The water carriage system of collection of waste product________________?A. is cheaper in initial cost than dry conservancy system
B. requires treatment before disposal
C. creates hygenic problem
D. all of the aboveIn water chemical treatment plant, use of chloramines ensures
Question: In water chemical treatment plant, use of chloramines ensures
[A].disinfection. [B].
taste & odour control. [C].
weed control in reservoirs. [D].
removal of permanent hardness. Answer: Option A
Explanation:
No answer description available for this question.
Alum as a coagulant is found to be most effective when pH range of water is______________?
Alum as a coagulant is found to be most effective when pH range of water is______________?A. 2 to 4
B. 4 to 6
C. 6 to 8
D. 8 to 10The settling velocity of a particle in a sedimentation tank increases if______________?
The settling velocity of a particle in a sedimentation tank increases if______________?A. particle size is decreased
B. the surface area of tank is increased
C. the depth of tank is decreased
D. none of the aboveAssertion A: Slow sand filters are more efficient in removal of bacteria than rapid sand filters. Reason R : The sand used in slow sand filters is finer than that in rapid sand filters. Select your answer based on the coding system given below?
Assertion A: Slow sand filters are more efficient in removal of bacteria than rapid sand filters. Reason R : The sand used in slow sand filters is finer than that in rapid sand filters. Select your answer based on the coding system given below?A. Both A and R are true and R is the correct explanation of A
B. Both A and R are true but R is not the correct explanation of A
C. A is true but R is false
D. A is false but R is true